Header And Logo
|
#include "postgres.h"#include <unistd.h>#include <fcntl.h>#include <sys/param.h>#include <sys/time.h>#include <sys/socket.h>#include <netdb.h>#include <netinet/in.h>#include <arpa/inet.h>#include <signal.h>#include "pgstat.h"#include "access/heapam.h"#include "access/htup_details.h"#include "access/transam.h"#include "access/twophase_rmgr.h"#include "access/xact.h"#include "catalog/pg_database.h"#include "catalog/pg_proc.h"#include "lib/ilist.h"#include "libpq/ip.h"#include "libpq/libpq.h"#include "libpq/pqsignal.h"#include "mb/pg_wchar.h"#include "miscadmin.h"#include "pg_trace.h"#include "postmaster/autovacuum.h"#include "postmaster/fork_process.h"#include "postmaster/postmaster.h"#include "storage/backendid.h"#include "storage/fd.h"#include "storage/ipc.h"#include "storage/latch.h"#include "storage/pg_shmem.h"#include "storage/procsignal.h"#include "utils/ascii.h"#include "utils/guc.h"#include "utils/memutils.h"#include "utils/ps_status.h"#include "utils/rel.h"#include "utils/timestamp.h"#include "utils/tqual.h"
Go to the source code of this file.
| #define PGSTAT_DB_HASH_SIZE 16 |
Definition at line 102 of file pgstat.c.
Referenced by pgstat_read_statsfiles().
| #define PGSTAT_FUNCTION_HASH_SIZE 512 |
Definition at line 104 of file pgstat.c.
Referenced by pgstat_init_function_usage(), pgstat_read_statsfiles(), and reset_dbentry_counters().
| #define PGSTAT_INQ_LOOP_COUNT (PGSTAT_INQ_INTERVAL / PGSTAT_RETRY_DELAY) |
Definition at line 95 of file pgstat.c.
Referenced by backend_read_statsfile().
| #define PGSTAT_POLL_LOOP_COUNT (PGSTAT_MAX_WAIT_TIME / PGSTAT_RETRY_DELAY) |
| #define PGSTAT_RESTART_INTERVAL 60 |
Definition at line 90 of file pgstat.c.
Referenced by pgstat_start().
| #define PGSTAT_RETRY_DELAY 10 |
Definition at line 81 of file pgstat.c.
Referenced by backend_read_statsfile().
| #define PGSTAT_STAT_INTERVAL 500 |
Definition at line 78 of file pgstat.c.
Referenced by backend_read_statsfile(), and pgstat_report_stat().
| #define PGSTAT_STAT_PERMANENT_DIRECTORY "pg_stat" |
Definition at line 70 of file pgstat.c.
Referenced by get_dbstat_filename(), and pgstat_reset_all().
| #define PGSTAT_STAT_PERMANENT_FILENAME "pg_stat/global.stat" |
Definition at line 71 of file pgstat.c.
Referenced by pgstat_read_db_statsfile_timestamp(), pgstat_read_statsfiles(), and pgstat_write_statsfiles().
| #define PGSTAT_STAT_PERMANENT_TMPFILE "pg_stat/global.tmp" |
Definition at line 72 of file pgstat.c.
Referenced by pgstat_write_statsfiles().
| #define PGSTAT_TAB_HASH_SIZE 512 |
Definition at line 103 of file pgstat.c.
Referenced by pgstat_collect_oids(), pgstat_read_statsfiles(), and reset_dbentry_counters().
| #define TABSTAT_QUANTUM 100 |
Definition at line 156 of file pgstat.c.
Referenced by get_tabstat_entry().
| #define TESTBYTEVAL ((char) 199) |
Referenced by pgstat_init().
| typedef struct DBWriteRequest DBWriteRequest |
| typedef struct PgStat_SubXactStatus PgStat_SubXactStatus |
| typedef struct TabStatusArray TabStatusArray |
| typedef struct TwoPhasePgStatRecord TwoPhasePgStatRecord |
| static void add_tabstat_xact_level | ( | PgStat_TableStatus * | pgstat_info, | |
| int | nest_level | |||
| ) | [static] |
Definition at line 1739 of file pgstat.c.
References PgStat_SubXactStatus::first, get_tabstat_stack_level(), MemoryContextAllocZero(), PgStat_TableXactStatus::nest_level, PgStat_TableXactStatus::next, PgStat_TableXactStatus::parent, TopTransactionContext, PgStat_TableStatus::trans, trans, and PgStat_TableXactStatus::upper.
Referenced by pgstat_count_heap_delete(), pgstat_count_heap_insert(), and pgstat_count_heap_update().
{
PgStat_SubXactStatus *xact_state;
PgStat_TableXactStatus *trans;
/*
* If this is the first rel to be modified at the current nest level, we
* first have to push a transaction stack entry.
*/
xact_state = get_tabstat_stack_level(nest_level);
/* Now make a per-table stack entry */
trans = (PgStat_TableXactStatus *)
MemoryContextAllocZero(TopTransactionContext,
sizeof(PgStat_TableXactStatus));
trans->nest_level = nest_level;
trans->upper = pgstat_info->trans;
trans->parent = pgstat_info;
trans->next = xact_state->first;
xact_state->first = trans;
pgstat_info->trans = trans;
}
| void allow_immediate_pgstat_restart | ( | void | ) |
Definition at line 692 of file pgstat.c.
References last_pgstat_start_time.
Referenced by HandleChildCrash().
{
last_pgstat_start_time = 0;
}
| void AtEOSubXact_PgStat | ( | bool | isCommit, | |
| int | nestDepth | |||
| ) |
Definition at line 1927 of file pgstat.c.
References Assert, PgStat_SubXactStatus::first, get_tabstat_stack_level(), PgStat_TableXactStatus::nest_level, PgStat_SubXactStatus::nest_level, PgStat_TableXactStatus::next, NULL, PgStat_TableXactStatus::parent, pfree(), PgStat_SubXactStatus::prev, PgStat_TableStatus::t_counts, PgStat_TableCounts::t_delta_dead_tuples, PgStat_TableCounts::t_tuples_deleted, PgStat_TableCounts::t_tuples_inserted, PgStat_TableCounts::t_tuples_updated, PgStat_TableStatus::trans, trans, PgStat_TableXactStatus::tuples_deleted, PgStat_TableXactStatus::tuples_inserted, PgStat_TableXactStatus::tuples_updated, and PgStat_TableXactStatus::upper.
Referenced by AbortSubTransaction(), and CommitSubTransaction().
{
PgStat_SubXactStatus *xact_state;
/*
* Transfer transactional insert/update counts into the next higher
* subtransaction state.
*/
xact_state = pgStatXactStack;
if (xact_state != NULL &&
xact_state->nest_level >= nestDepth)
{
PgStat_TableXactStatus *trans;
PgStat_TableXactStatus *next_trans;
/* delink xact_state from stack immediately to simplify reuse case */
pgStatXactStack = xact_state->prev;
for (trans = xact_state->first; trans != NULL; trans = next_trans)
{
PgStat_TableStatus *tabstat;
next_trans = trans->next;
Assert(trans->nest_level == nestDepth);
tabstat = trans->parent;
Assert(tabstat->trans == trans);
if (isCommit)
{
if (trans->upper && trans->upper->nest_level == nestDepth - 1)
{
trans->upper->tuples_inserted += trans->tuples_inserted;
trans->upper->tuples_updated += trans->tuples_updated;
trans->upper->tuples_deleted += trans->tuples_deleted;
tabstat->trans = trans->upper;
pfree(trans);
}
else
{
/*
* When there isn't an immediate parent state, we can just
* reuse the record instead of going through a
* palloc/pfree pushup (this works since it's all in
* TopTransactionContext anyway). We have to re-link it
* into the parent level, though, and that might mean
* pushing a new entry into the pgStatXactStack.
*/
PgStat_SubXactStatus *upper_xact_state;
upper_xact_state = get_tabstat_stack_level(nestDepth - 1);
trans->next = upper_xact_state->first;
upper_xact_state->first = trans;
trans->nest_level = nestDepth - 1;
}
}
else
{
/*
* On abort, update top-level tabstat counts, then forget the
* subtransaction
*/
/* count attempted actions regardless of commit/abort */
tabstat->t_counts.t_tuples_inserted += trans->tuples_inserted;
tabstat->t_counts.t_tuples_updated += trans->tuples_updated;
tabstat->t_counts.t_tuples_deleted += trans->tuples_deleted;
/* inserted tuples are dead, deleted tuples are unaffected */
tabstat->t_counts.t_delta_dead_tuples +=
trans->tuples_inserted + trans->tuples_updated;
tabstat->trans = trans->upper;
pfree(trans);
}
}
pfree(xact_state);
}
}
| void AtEOXact_PgStat | ( | bool | isCommit | ) |
Definition at line 1854 of file pgstat.c.
References Assert, PgStat_SubXactStatus::first, PgStat_TableXactStatus::nest_level, PgStat_SubXactStatus::nest_level, PgStat_TableXactStatus::next, NULL, PgStat_TableXactStatus::parent, pgstat_clear_snapshot(), pgStatXactCommit, pgStatXactRollback, PgStat_SubXactStatus::prev, PgStat_TableCounts::t_changed_tuples, PgStat_TableStatus::t_counts, PgStat_TableCounts::t_delta_dead_tuples, PgStat_TableCounts::t_delta_live_tuples, PgStat_TableCounts::t_tuples_deleted, PgStat_TableCounts::t_tuples_inserted, PgStat_TableCounts::t_tuples_updated, PgStat_TableStatus::trans, trans, PgStat_TableXactStatus::tuples_deleted, PgStat_TableXactStatus::tuples_inserted, PgStat_TableXactStatus::tuples_updated, and PgStat_TableXactStatus::upper.
Referenced by AbortTransaction(), CommitTransaction(), and FinishPreparedTransaction().
{
PgStat_SubXactStatus *xact_state;
/*
* Count transaction commit or abort. (We use counters, not just bools,
* in case the reporting message isn't sent right away.)
*/
if (isCommit)
pgStatXactCommit++;
else
pgStatXactRollback++;
/*
* Transfer transactional insert/update counts into the base tabstat
* entries. We don't bother to free any of the transactional state, since
* it's all in TopTransactionContext and will go away anyway.
*/
xact_state = pgStatXactStack;
if (xact_state != NULL)
{
PgStat_TableXactStatus *trans;
Assert(xact_state->nest_level == 1);
Assert(xact_state->prev == NULL);
for (trans = xact_state->first; trans != NULL; trans = trans->next)
{
PgStat_TableStatus *tabstat;
Assert(trans->nest_level == 1);
Assert(trans->upper == NULL);
tabstat = trans->parent;
Assert(tabstat->trans == trans);
/* count attempted actions regardless of commit/abort */
tabstat->t_counts.t_tuples_inserted += trans->tuples_inserted;
tabstat->t_counts.t_tuples_updated += trans->tuples_updated;
tabstat->t_counts.t_tuples_deleted += trans->tuples_deleted;
if (isCommit)
{
/* insert adds a live tuple, delete removes one */
tabstat->t_counts.t_delta_live_tuples +=
trans->tuples_inserted - trans->tuples_deleted;
/* update and delete each create a dead tuple */
tabstat->t_counts.t_delta_dead_tuples +=
trans->tuples_updated + trans->tuples_deleted;
/* insert, update, delete each count as one change event */
tabstat->t_counts.t_changed_tuples +=
trans->tuples_inserted + trans->tuples_updated +
trans->tuples_deleted;
}
else
{
/* inserted tuples are dead, deleted tuples are unaffected */
tabstat->t_counts.t_delta_dead_tuples +=
trans->tuples_inserted + trans->tuples_updated;
/* an aborted xact generates no changed_tuple events */
}
tabstat->trans = NULL;
}
}
pgStatXactStack = NULL;
/* Make sure any stats snapshot is thrown away */
pgstat_clear_snapshot();
}
| void AtPrepare_PgStat | ( | void | ) |
Definition at line 2012 of file pgstat.c.
References Assert, PgStat_SubXactStatus::first, PgStat_TableXactStatus::nest_level, PgStat_SubXactStatus::nest_level, PgStat_TableXactStatus::next, NULL, PgStat_TableXactStatus::parent, PgStat_SubXactStatus::prev, RegisterTwoPhaseRecord(), PgStat_TableStatus::t_id, TwoPhasePgStatRecord::t_id, PgStat_TableStatus::t_shared, TwoPhasePgStatRecord::t_shared, PgStat_TableStatus::trans, trans, PgStat_TableXactStatus::tuples_deleted, TwoPhasePgStatRecord::tuples_deleted, PgStat_TableXactStatus::tuples_inserted, TwoPhasePgStatRecord::tuples_inserted, PgStat_TableXactStatus::tuples_updated, TwoPhasePgStatRecord::tuples_updated, TWOPHASE_RM_PGSTAT_ID, and PgStat_TableXactStatus::upper.
Referenced by PrepareTransaction().
{
PgStat_SubXactStatus *xact_state;
xact_state = pgStatXactStack;
if (xact_state != NULL)
{
PgStat_TableXactStatus *trans;
Assert(xact_state->nest_level == 1);
Assert(xact_state->prev == NULL);
for (trans = xact_state->first; trans != NULL; trans = trans->next)
{
PgStat_TableStatus *tabstat;
TwoPhasePgStatRecord record;
Assert(trans->nest_level == 1);
Assert(trans->upper == NULL);
tabstat = trans->parent;
Assert(tabstat->trans == trans);
record.tuples_inserted = trans->tuples_inserted;
record.tuples_updated = trans->tuples_updated;
record.tuples_deleted = trans->tuples_deleted;
record.t_id = tabstat->t_id;
record.t_shared = tabstat->t_shared;
RegisterTwoPhaseRecord(TWOPHASE_RM_PGSTAT_ID, 0,
&record, sizeof(TwoPhasePgStatRecord));
}
}
}
| static void backend_read_statsfile | ( | void | ) | [static] |
Definition at line 4229 of file pgstat.c.
References Assert, CHECK_FOR_INTERRUPTS, elog, GetCurrentTimestamp(), InvalidOid, IsAutoVacuumLauncherProcess(), IsAutoVacuumWorkerProcess(), LOG, MyDatabaseId, pfree(), pg_usleep(), PGSTAT_INQ_LOOP_COUNT, pgstat_read_db_statsfile_timestamp(), pgstat_read_statsfiles(), PGSTAT_RETRY_DELAY, pgstat_send_inquiry(), PGSTAT_STAT_INTERVAL, pgStatRunningInCollector, pstrdup(), timestamptz_to_str(), TimestampTzPlusMilliseconds, and WARNING.
Referenced by pgstat_fetch_global(), pgstat_fetch_stat_dbentry(), pgstat_fetch_stat_funcentry(), pgstat_fetch_stat_tabentry(), and pgstat_vacuum_stat().
{
TimestampTz min_ts = 0;
TimestampTz ref_ts = 0;
int count;
/* already read it? */
if (pgStatDBHash)
return;
Assert(!pgStatRunningInCollector);
/*
* Loop until fresh enough stats file is available or we ran out of time.
* The stats inquiry message is sent repeatedly in case collector drops
* it; but not every single time, as that just swamps the collector.
*/
for (count = 0; count < PGSTAT_POLL_LOOP_COUNT; count++)
{
bool ok;
TimestampTz file_ts = 0;
TimestampTz cur_ts;
CHECK_FOR_INTERRUPTS();
ok = pgstat_read_db_statsfile_timestamp(MyDatabaseId, false, &file_ts);
cur_ts = GetCurrentTimestamp();
/* Calculate min acceptable timestamp, if we didn't already */
if (count == 0 || cur_ts < ref_ts)
{
/*
* We set the minimum acceptable timestamp to PGSTAT_STAT_INTERVAL
* msec before now. This indirectly ensures that the collector
* needn't write the file more often than PGSTAT_STAT_INTERVAL. In
* an autovacuum worker, however, we want a lower delay to avoid
* using stale data, so we use PGSTAT_RETRY_DELAY (since the
* number of workers is low, this shouldn't be a problem).
*
* We don't recompute min_ts after sleeping, except in the
* unlikely case that cur_ts went backwards. So we might end up
* accepting a file a bit older than PGSTAT_STAT_INTERVAL. In
* practice that shouldn't happen, though, as long as the sleep
* time is less than PGSTAT_STAT_INTERVAL; and we don't want to
* tell the collector that our cutoff time is less than what we'd
* actually accept.
*/
ref_ts = cur_ts;
if (IsAutoVacuumWorkerProcess())
min_ts = TimestampTzPlusMilliseconds(ref_ts,
-PGSTAT_RETRY_DELAY);
else
min_ts = TimestampTzPlusMilliseconds(ref_ts,
-PGSTAT_STAT_INTERVAL);
}
/*
* If the file timestamp is actually newer than cur_ts, we must have
* had a clock glitch (system time went backwards) or there is clock
* skew between our processor and the stats collector's processor.
* Accept the file, but send an inquiry message anyway to make
* pgstat_recv_inquiry do a sanity check on the collector's time.
*/
if (ok && file_ts > cur_ts)
{
/*
* A small amount of clock skew between processors isn't terribly
* surprising, but a large difference is worth logging. We
* arbitrarily define "large" as 1000 msec.
*/
if (file_ts >= TimestampTzPlusMilliseconds(cur_ts, 1000))
{
char *filetime;
char *mytime;
/* Copy because timestamptz_to_str returns a static buffer */
filetime = pstrdup(timestamptz_to_str(file_ts));
mytime = pstrdup(timestamptz_to_str(cur_ts));
elog(LOG, "stats collector's time %s is later than backend local time %s",
filetime, mytime);
pfree(filetime);
pfree(mytime);
}
pgstat_send_inquiry(cur_ts, min_ts, MyDatabaseId);
break;
}
/* Normal acceptance case: file is not older than cutoff time */
if (ok && file_ts >= min_ts)
break;
/* Not there or too old, so kick the collector and wait a bit */
if ((count % PGSTAT_INQ_LOOP_COUNT) == 0)
pgstat_send_inquiry(cur_ts, min_ts, MyDatabaseId);
pg_usleep(PGSTAT_RETRY_DELAY * 1000L);
}
if (count >= PGSTAT_POLL_LOOP_COUNT)
elog(WARNING, "pgstat wait timeout");
/*
* Autovacuum launcher wants stats about all databases, but a shallow read
* is sufficient.
*/
if (IsAutoVacuumLauncherProcess())
pgStatDBHash = pgstat_read_statsfiles(InvalidOid, false, false);
else
pgStatDBHash = pgstat_read_statsfiles(MyDatabaseId, false, true);
}
| Size BackendStatusShmemSize | ( | void | ) |
Definition at line 2322 of file pgstat.c.
References add_size(), MaxBackends, mul_size(), NAMEDATALEN, and pgstat_track_activity_query_size.
Referenced by CreateSharedMemoryAndSemaphores().
{
Size size;
size = mul_size(sizeof(PgBackendStatus), MaxBackends);
size = add_size(size,
mul_size(NAMEDATALEN, MaxBackends));
size = add_size(size,
mul_size(pgstat_track_activity_query_size, MaxBackends));
size = add_size(size,
mul_size(NAMEDATALEN, MaxBackends));
return size;
}
| void CreateSharedBackendStatus | ( | void | ) |
Definition at line 2341 of file pgstat.c.
References i, MaxBackends, MemSet, mul_size(), NAMEDATALEN, pgstat_track_activity_query_size, ShmemInitStruct(), PgBackendStatus::st_activity, PgBackendStatus::st_appname, and PgBackendStatus::st_clienthostname.
Referenced by CreateSharedMemoryAndSemaphores().
{
Size size;
bool found;
int i;
char *buffer;
/* Create or attach to the shared array */
size = mul_size(sizeof(PgBackendStatus), MaxBackends);
BackendStatusArray = (PgBackendStatus *)
ShmemInitStruct("Backend Status Array", size, &found);
if (!found)
{
/*
* We're the first - initialize.
*/
MemSet(BackendStatusArray, 0, size);
}
/* Create or attach to the shared appname buffer */
size = mul_size(NAMEDATALEN, MaxBackends);
BackendAppnameBuffer = (char *)
ShmemInitStruct("Backend Application Name Buffer", size, &found);
if (!found)
{
MemSet(BackendAppnameBuffer, 0, size);
/* Initialize st_appname pointers. */
buffer = BackendAppnameBuffer;
for (i = 0; i < MaxBackends; i++)
{
BackendStatusArray[i].st_appname = buffer;
buffer += NAMEDATALEN;
}
}
/* Create or attach to the shared client hostname buffer */
size = mul_size(NAMEDATALEN, MaxBackends);
BackendClientHostnameBuffer = (char *)
ShmemInitStruct("Backend Client Host Name Buffer", size, &found);
if (!found)
{
MemSet(BackendClientHostnameBuffer, 0, size);
/* Initialize st_clienthostname pointers. */
buffer = BackendClientHostnameBuffer;
for (i = 0; i < MaxBackends; i++)
{
BackendStatusArray[i].st_clienthostname = buffer;
buffer += NAMEDATALEN;
}
}
/* Create or attach to the shared activity buffer */
BackendActivityBufferSize = mul_size(pgstat_track_activity_query_size,
MaxBackends);
BackendActivityBuffer = (char *)
ShmemInitStruct("Backend Activity Buffer",
BackendActivityBufferSize,
&found);
if (!found)
{
MemSet(BackendActivityBuffer, 0, size);
/* Initialize st_activity pointers. */
buffer = BackendActivityBuffer;
for (i = 0; i < MaxBackends; i++)
{
BackendStatusArray[i].st_activity = buffer;
buffer += pgstat_track_activity_query_size;
}
}
}
| PgStat_BackendFunctionEntry* find_funcstat_entry | ( | Oid | func_id | ) |
Definition at line 1518 of file pgstat.c.
References HASH_FIND, hash_search(), and NULL.
Referenced by pg_stat_get_xact_function_calls(), pg_stat_get_xact_function_self_time(), and pg_stat_get_xact_function_total_time().
{
if (pgStatFunctions == NULL)
return NULL;
return (PgStat_BackendFunctionEntry *) hash_search(pgStatFunctions,
(void *) &func_id,
HASH_FIND, NULL);
}
| PgStat_TableStatus* find_tabstat_entry | ( | Oid | rel_id | ) |
Definition at line 1693 of file pgstat.c.
References i, PgStat_TableStatus::t_id, TabStatusArray::tsa_entries, TabStatusArray::tsa_next, and TabStatusArray::tsa_used.
Referenced by pg_stat_get_xact_blocks_fetched(), pg_stat_get_xact_blocks_hit(), pg_stat_get_xact_numscans(), pg_stat_get_xact_tuples_deleted(), pg_stat_get_xact_tuples_fetched(), pg_stat_get_xact_tuples_hot_updated(), pg_stat_get_xact_tuples_inserted(), pg_stat_get_xact_tuples_returned(), and pg_stat_get_xact_tuples_updated().
{
PgStat_TableStatus *entry;
TabStatusArray *tsa;
int i;
for (tsa = pgStatTabList; tsa != NULL; tsa = tsa->tsa_next)
{
for (i = 0; i < tsa->tsa_used; i++)
{
entry = &tsa->tsa_entries[i];
if (entry->t_id == rel_id)
return entry;
}
}
/* Not present */
return NULL;
}
| static void get_dbstat_filename | ( | bool | permanent, | |
| bool | tempname, | |||
| Oid | databaseid, | |||
| char * | filename, | |||
| int | len | |||
| ) | [static] |
Definition at line 3618 of file pgstat.c.
References elog, ERROR, pgstat_stat_directory, PGSTAT_STAT_PERMANENT_DIRECTORY, and snprintf().
Referenced by pgstat_read_db_statsfile(), pgstat_recv_dropdb(), and pgstat_write_db_statsfile().
{
int printed;
printed = snprintf(filename, len, "%s/db_%u.%s",
permanent ? PGSTAT_STAT_PERMANENT_DIRECTORY :
pgstat_stat_directory,
databaseid,
tempname ? "tmp" : "stat");
if (printed > len)
elog(ERROR, "overlength pgstat path");
}
| static PgStat_TableStatus * get_tabstat_entry | ( | Oid | rel_id, | |
| bool | isshared | |||
| ) | [static] |
Definition at line 1634 of file pgstat.c.
References i, MemoryContextAllocZero(), PgStat_TableStatus::t_id, PgStat_TableStatus::t_shared, TABSTAT_QUANTUM, TopMemoryContext, and TabStatusArray::tsa_next.
Referenced by pgstat_initstats(), pgstat_twophase_postabort(), and pgstat_twophase_postcommit().
{
PgStat_TableStatus *entry;
TabStatusArray *tsa;
TabStatusArray *prev_tsa;
int i;
/*
* Search the already-used tabstat slots for this relation.
*/
prev_tsa = NULL;
for (tsa = pgStatTabList; tsa != NULL; prev_tsa = tsa, tsa = tsa->tsa_next)
{
for (i = 0; i < tsa->tsa_used; i++)
{
entry = &tsa->tsa_entries[i];
if (entry->t_id == rel_id)
return entry;
}
if (tsa->tsa_used < TABSTAT_QUANTUM)
{
/*
* It must not be present, but we found a free slot instead. Fine,
* let's use this one. We assume the entry was already zeroed,
* either at creation or after last use.
*/
entry = &tsa->tsa_entries[tsa->tsa_used++];
entry->t_id = rel_id;
entry->t_shared = isshared;
return entry;
}
}
/*
* We ran out of tabstat slots, so allocate more. Be sure they're zeroed.
*/
tsa = (TabStatusArray *) MemoryContextAllocZero(TopMemoryContext,
sizeof(TabStatusArray));
if (prev_tsa)
prev_tsa->tsa_next = tsa;
else
pgStatTabList = tsa;
/*
* Use the first entry of the new TabStatusArray.
*/
entry = &tsa->tsa_entries[tsa->tsa_used++];
entry->t_id = rel_id;
entry->t_shared = isshared;
return entry;
}
| static PgStat_SubXactStatus* get_tabstat_stack_level | ( | int | nest_level | ) | [static] |
Definition at line 1717 of file pgstat.c.
References PgStat_SubXactStatus::first, MemoryContextAlloc(), PgStat_SubXactStatus::nest_level, NULL, PgStat_SubXactStatus::prev, and TopTransactionContext.
Referenced by add_tabstat_xact_level(), and AtEOSubXact_PgStat().
{
PgStat_SubXactStatus *xact_state;
xact_state = pgStatXactStack;
if (xact_state == NULL || xact_state->nest_level != nest_level)
{
xact_state = (PgStat_SubXactStatus *)
MemoryContextAlloc(TopTransactionContext,
sizeof(PgStat_SubXactStatus));
xact_state->nest_level = nest_level;
xact_state->prev = pgStatXactStack;
xact_state->first = NULL;
pgStatXactStack = xact_state;
}
return xact_state;
}
| static void pgstat_beshutdown_hook | ( | int | code, | |
| Datum | arg | |||
| ) | [static] |
Definition at line 2532 of file pgstat.c.
References Assert, MyDatabaseId, OidIsValid, pgstat_report_stat(), PgBackendStatus::st_changecount, and PgBackendStatus::st_procpid.
Referenced by pgstat_initialize().
{
volatile PgBackendStatus *beentry = MyBEEntry;
/*
* If we got as far as discovering our own database ID, we can report what
* we did to the collector. Otherwise, we'd be sending an invalid
* database ID, so forget it. (This means that accesses to pg_database
* during failed backend starts might never get counted.)
*/
if (OidIsValid(MyDatabaseId))
pgstat_report_stat(true);
/*
* Clear my status entry, following the protocol of bumping st_changecount
* before and after. We use a volatile pointer here to ensure the
* compiler doesn't try to get cute.
*/
beentry->st_changecount++;
beentry->st_procpid = 0; /* mark invalid */
beentry->st_changecount++;
Assert((beentry->st_changecount & 1) == 0);
}
| void pgstat_bestart | ( | void | ) |
Definition at line 2451 of file pgstat.c.
References application_name, Assert, GetCurrentTimestamp(), GetSessionUserId(), MemSet, MyDatabaseId, MyProcPid, MyProcPort, NAMEDATALEN, pgstat_report_appname(), pgstat_track_activity_query_size, Port::raddr, Port::remote_hostname, Port::SessionStartTime, PgBackendStatus::st_activity, PgBackendStatus::st_activity_start_timestamp, PgBackendStatus::st_appname, PgBackendStatus::st_changecount, PgBackendStatus::st_clientaddr, PgBackendStatus::st_clienthostname, PgBackendStatus::st_databaseid, PgBackendStatus::st_proc_start_timestamp, PgBackendStatus::st_procpid, PgBackendStatus::st_state, PgBackendStatus::st_state_start_timestamp, PgBackendStatus::st_userid, PgBackendStatus::st_waiting, PgBackendStatus::st_xact_start_timestamp, and strlcpy().
Referenced by InitPostgres().
{
TimestampTz proc_start_timestamp;
Oid userid;
SockAddr clientaddr;
volatile PgBackendStatus *beentry;
/*
* To minimize the time spent modifying the PgBackendStatus entry, fetch
* all the needed data first.
*
* If we have a MyProcPort, use its session start time (for consistency,
* and to save a kernel call).
*/
if (MyProcPort)
proc_start_timestamp = MyProcPort->SessionStartTime;
else
proc_start_timestamp = GetCurrentTimestamp();
userid = GetSessionUserId();
/*
* We may not have a MyProcPort (eg, if this is the autovacuum process).
* If so, use all-zeroes client address, which is dealt with specially in
* pg_stat_get_backend_client_addr and pg_stat_get_backend_client_port.
*/
if (MyProcPort)
memcpy(&clientaddr, &MyProcPort->raddr, sizeof(clientaddr));
else
MemSet(&clientaddr, 0, sizeof(clientaddr));
/*
* Initialize my status entry, following the protocol of bumping
* st_changecount before and after; and make sure it's even afterwards. We
* use a volatile pointer here to ensure the compiler doesn't try to get
* cute.
*/
beentry = MyBEEntry;
do
{
beentry->st_changecount++;
} while ((beentry->st_changecount & 1) == 0);
beentry->st_procpid = MyProcPid;
beentry->st_proc_start_timestamp = proc_start_timestamp;
beentry->st_activity_start_timestamp = 0;
beentry->st_state_start_timestamp = 0;
beentry->st_xact_start_timestamp = 0;
beentry->st_databaseid = MyDatabaseId;
beentry->st_userid = userid;
beentry->st_clientaddr = clientaddr;
beentry->st_clienthostname[0] = '\0';
beentry->st_waiting = false;
beentry->st_state = STATE_UNDEFINED;
beentry->st_appname[0] = '\0';
beentry->st_activity[0] = '\0';
/* Also make sure the last byte in each string area is always 0 */
beentry->st_clienthostname[NAMEDATALEN - 1] = '\0';
beentry->st_appname[NAMEDATALEN - 1] = '\0';
beentry->st_activity[pgstat_track_activity_query_size - 1] = '\0';
beentry->st_changecount++;
Assert((beentry->st_changecount & 1) == 0);
if (MyProcPort && MyProcPort->remote_hostname)
strlcpy(beentry->st_clienthostname, MyProcPort->remote_hostname, NAMEDATALEN);
/* Update app name to current GUC setting */
if (application_name)
pgstat_report_appname(application_name);
}
| void pgstat_clear_snapshot | ( | void | ) |
Definition at line 4370 of file pgstat.c.
References localNumBackends, and MemoryContextDelete().
Referenced by AtEOXact_PgStat(), autovac_refresh_stats(), AutoVacLauncherMain(), pg_stat_clear_snapshot(), and PostPrepare_PgStat().
{
/* Release memory, if any was allocated */
if (pgStatLocalContext)
MemoryContextDelete(pgStatLocalContext);
/* Reset variables */
pgStatLocalContext = NULL;
pgStatDBHash = NULL;
localBackendStatusTable = NULL;
localNumBackends = 0;
}
Definition at line 1093 of file pgstat.c.
References AccessShareLock, CHECK_FOR_INTERRUPTS, CurrentMemoryContext, HASHCTL::entrysize, ForwardScanDirection, HASHCTL::hash, HASH_CONTEXT, hash_create(), HASH_ELEM, HASH_FUNCTION, hash_search(), HASHCTL::hcxt, heap_beginscan(), heap_close, heap_endscan(), heap_getnext(), heap_open(), HeapTupleGetOid, HASHCTL::keysize, NULL, PGSTAT_TAB_HASH_SIZE, and SnapshotNow.
Referenced by pgstat_vacuum_stat().
{
HTAB *htab;
HASHCTL hash_ctl;
Relation rel;
HeapScanDesc scan;
HeapTuple tup;
memset(&hash_ctl, 0, sizeof(hash_ctl));
hash_ctl.keysize = sizeof(Oid);
hash_ctl.entrysize = sizeof(Oid);
hash_ctl.hash = oid_hash;
hash_ctl.hcxt = CurrentMemoryContext;
htab = hash_create("Temporary table of OIDs",
PGSTAT_TAB_HASH_SIZE,
&hash_ctl,
HASH_ELEM | HASH_FUNCTION | HASH_CONTEXT);
rel = heap_open(catalogid, AccessShareLock);
scan = heap_beginscan(rel, SnapshotNow, 0, NULL);
while ((tup = heap_getnext(scan, ForwardScanDirection)) != NULL)
{
Oid thisoid = HeapTupleGetOid(tup);
CHECK_FOR_INTERRUPTS();
(void) hash_search(htab, (void *) &thisoid, HASH_ENTER, NULL);
}
heap_endscan(scan);
heap_close(rel, AccessShareLock);
return htab;
}
| void pgstat_count_heap_delete | ( | Relation | rel | ) |
Definition at line 1812 of file pgstat.c.
References add_tabstat_xact_level(), GetCurrentTransactionNestLevel(), PgStat_TableXactStatus::nest_level, NULL, RelationData::pgstat_info, PgStat_TableStatus::trans, and PgStat_TableXactStatus::tuples_deleted.
Referenced by heap_delete().
{
PgStat_TableStatus *pgstat_info = rel->pgstat_info;
if (pgstat_info != NULL)
{
/* We have to log the effect at the proper transactional level */
int nest_level = GetCurrentTransactionNestLevel();
if (pgstat_info->trans == NULL ||
pgstat_info->trans->nest_level != nest_level)
add_tabstat_xact_level(pgstat_info, nest_level);
pgstat_info->trans->tuples_deleted++;
}
}
| void pgstat_count_heap_insert | ( | Relation | rel, | |
| int | n | |||
| ) |
Definition at line 1766 of file pgstat.c.
References add_tabstat_xact_level(), GetCurrentTransactionNestLevel(), PgStat_TableXactStatus::nest_level, NULL, RelationData::pgstat_info, PgStat_TableStatus::trans, and PgStat_TableXactStatus::tuples_inserted.
Referenced by heap_insert(), and heap_multi_insert().
{
PgStat_TableStatus *pgstat_info = rel->pgstat_info;
if (pgstat_info != NULL)
{
/* We have to log the effect at the proper transactional level */
int nest_level = GetCurrentTransactionNestLevel();
if (pgstat_info->trans == NULL ||
pgstat_info->trans->nest_level != nest_level)
add_tabstat_xact_level(pgstat_info, nest_level);
pgstat_info->trans->tuples_inserted += n;
}
}
Definition at line 1787 of file pgstat.c.
References add_tabstat_xact_level(), GetCurrentTransactionNestLevel(), PgStat_TableXactStatus::nest_level, NULL, RelationData::pgstat_info, PgStat_TableStatus::t_counts, PgStat_TableCounts::t_tuples_hot_updated, PgStat_TableStatus::trans, and PgStat_TableXactStatus::tuples_updated.
Referenced by heap_update().
{
PgStat_TableStatus *pgstat_info = rel->pgstat_info;
if (pgstat_info != NULL)
{
/* We have to log the effect at the proper transactional level */
int nest_level = GetCurrentTransactionNestLevel();
if (pgstat_info->trans == NULL ||
pgstat_info->trans->nest_level != nest_level)
add_tabstat_xact_level(pgstat_info, nest_level);
pgstat_info->trans->tuples_updated++;
/* t_tuples_hot_updated is nontransactional, so just advance it */
if (hot)
pgstat_info->t_counts.t_tuples_hot_updated++;
}
}
Definition at line 5024 of file pgstat.c.
References slist_iter::cur, DBWriteRequest::databaseid, next(), slist_container, and slist_foreach.
Referenced by pgstat_write_statsfiles().
{
slist_iter iter;
/* Check the databases if they need to refresh the stats. */
slist_foreach(iter, &last_statrequests)
{
DBWriteRequest *req = slist_container(DBWriteRequest, next, iter.cur);
if (req->databaseid == databaseid)
return true;
}
return false;
}
| void pgstat_drop_database | ( | Oid | databaseid | ) |
Definition at line 1137 of file pgstat.c.
References PgStat_MsgDropdb::m_databaseid, PgStat_MsgDropdb::m_hdr, PGINVALID_SOCKET, PGSTAT_MTYPE_DROPDB, pgstat_send(), pgstat_setheader(), and pgStatSock.
Referenced by dropdb(), and pgstat_vacuum_stat().
{
PgStat_MsgDropdb msg;
if (pgStatSock == PGINVALID_SOCKET)
return;
pgstat_setheader(&msg.m_hdr, PGSTAT_MTYPE_DROPDB);
msg.m_databaseid = databaseid;
pgstat_send(&msg, sizeof(msg));
}
| void pgstat_end_function_usage | ( | PgStat_FunctionCallUsage * | fcu, | |
| bool | finalize | |||
| ) |
Definition at line 1538 of file pgstat.c.
References PgStat_FunctionCounts::f_numcalls, PgStat_FunctionCounts::f_self_time, PgStat_FunctionCallUsage::f_start, PgStat_FunctionCounts::f_total_time, PgStat_FunctionCallUsage::fs, have_function_stats, INSTR_TIME_ADD, INSTR_TIME_SET_CURRENT, INSTR_TIME_SUBTRACT, NULL, PgStat_FunctionCallUsage::save_f_total_time, PgStat_FunctionCallUsage::save_total, and total_func_time.
Referenced by EventTriggerInvoke(), ExecCallTriggerFunc(), ExecMakeFunctionResult(), ExecMakeFunctionResultNoSets(), ExecMakeTableFunctionResult(), and fmgr_security_definer().
{
PgStat_FunctionCounts *fs = fcu->fs;
instr_time f_total;
instr_time f_others;
instr_time f_self;
/* stats not wanted? */
if (fs == NULL)
return;
/* total elapsed time in this function call */
INSTR_TIME_SET_CURRENT(f_total);
INSTR_TIME_SUBTRACT(f_total, fcu->f_start);
/* self usage: elapsed minus anything already charged to other calls */
f_others = total_func_time;
INSTR_TIME_SUBTRACT(f_others, fcu->save_total);
f_self = f_total;
INSTR_TIME_SUBTRACT(f_self, f_others);
/* update backend-wide total time */
INSTR_TIME_ADD(total_func_time, f_self);
/*
* Compute the new f_total_time as the total elapsed time added to the
* pre-call value of f_total_time. This is necessary to avoid
* double-counting any time taken by recursive calls of myself. (We do
* not need any similar kluge for self time, since that already excludes
* any recursive calls.)
*/
INSTR_TIME_ADD(f_total, fcu->save_f_total_time);
/* update counters in function stats table */
if (finalize)
fs->f_numcalls++;
fs->f_total_time = f_total;
INSTR_TIME_ADD(fs->f_self_time, f_self);
/* indicate that we have something to send */
have_function_stats = true;
}
| static void pgstat_exit | ( | SIGNAL_ARGS | ) | [static] |
Definition at line 3317 of file pgstat.c.
References need_exit, and SetLatch().
Referenced by PgstatCollectorMain().
{
int save_errno = errno;
need_exit = true;
SetLatch(&pgStatLatch);
errno = save_errno;
}
| PgStat_GlobalStats* pgstat_fetch_global | ( | void | ) |
Definition at line 2297 of file pgstat.c.
References backend_read_statsfile().
Referenced by pg_stat_get_bgwriter_buf_written_checkpoints(), pg_stat_get_bgwriter_buf_written_clean(), pg_stat_get_bgwriter_maxwritten_clean(), pg_stat_get_bgwriter_requested_checkpoints(), pg_stat_get_bgwriter_stat_reset_time(), pg_stat_get_bgwriter_timed_checkpoints(), pg_stat_get_buf_alloc(), pg_stat_get_buf_fsync_backend(), pg_stat_get_buf_written_backend(), pg_stat_get_checkpoint_sync_time(), and pg_stat_get_checkpoint_write_time().
{
backend_read_statsfile();
return &globalStats;
}
| PgBackendStatus* pgstat_fetch_stat_beentry | ( | int | beid | ) |
Definition at line 2262 of file pgstat.c.
References localNumBackends, and pgstat_read_current_status().
Referenced by pg_stat_get_activity(), pg_stat_get_backend_activity(), pg_stat_get_backend_activity_start(), pg_stat_get_backend_client_addr(), pg_stat_get_backend_client_port(), pg_stat_get_backend_dbid(), pg_stat_get_backend_pid(), pg_stat_get_backend_start(), pg_stat_get_backend_userid(), pg_stat_get_backend_waiting(), pg_stat_get_backend_xact_start(), and pg_stat_get_db_numbackends().
{
pgstat_read_current_status();
if (beid < 1 || beid > localNumBackends)
return NULL;
return &localBackendStatusTable[beid - 1];
}
| PgStat_StatDBEntry* pgstat_fetch_stat_dbentry | ( | Oid | dbid | ) |
Definition at line 2147 of file pgstat.c.
References backend_read_statsfile(), HASH_FIND, hash_search(), and NULL.
Referenced by do_autovacuum(), do_start_worker(), pg_stat_get_db_blk_read_time(), pg_stat_get_db_blk_write_time(), pg_stat_get_db_blocks_fetched(), pg_stat_get_db_blocks_hit(), pg_stat_get_db_conflict_all(), pg_stat_get_db_conflict_bufferpin(), pg_stat_get_db_conflict_lock(), pg_stat_get_db_conflict_snapshot(), pg_stat_get_db_conflict_startup_deadlock(), pg_stat_get_db_conflict_tablespace(), pg_stat_get_db_deadlocks(), pg_stat_get_db_stat_reset_time(), pg_stat_get_db_temp_bytes(), pg_stat_get_db_temp_files(), pg_stat_get_db_tuples_deleted(), pg_stat_get_db_tuples_fetched(), pg_stat_get_db_tuples_inserted(), pg_stat_get_db_tuples_returned(), pg_stat_get_db_tuples_updated(), pg_stat_get_db_xact_commit(), pg_stat_get_db_xact_rollback(), pgstat_fetch_stat_funcentry(), rebuild_database_list(), and table_recheck_autovac().
{
/*
* If not done for this transaction, read the statistics collector stats
* file into some hash tables.
*/
backend_read_statsfile();
/*
* Lookup the requested database; return NULL if not found
*/
return (PgStat_StatDBEntry *) hash_search(pgStatDBHash,
(void *) &dbid,
HASH_FIND, NULL);
}
| PgStat_StatFuncEntry* pgstat_fetch_stat_funcentry | ( | Oid | func_id | ) |
Definition at line 2230 of file pgstat.c.
References backend_read_statsfile(), PgStat_StatDBEntry::functions, hash_search(), MyDatabaseId, NULL, and pgstat_fetch_stat_dbentry().
Referenced by pg_stat_get_function_calls(), pg_stat_get_function_self_time(), and pg_stat_get_function_total_time().
{
PgStat_StatDBEntry *dbentry;
PgStat_StatFuncEntry *funcentry = NULL;
/* load the stats file if needed */
backend_read_statsfile();
/* Lookup our database, then find the requested function. */
dbentry = pgstat_fetch_stat_dbentry(MyDatabaseId);
if (dbentry != NULL && dbentry->functions != NULL)
{
funcentry = (PgStat_StatFuncEntry *) hash_search(dbentry->functions,
(void *) &func_id,
HASH_FIND, NULL);
}
return funcentry;
}
| int pgstat_fetch_stat_numbackends | ( | void | ) |
Definition at line 2281 of file pgstat.c.
References localNumBackends, and pgstat_read_current_status().
Referenced by pg_stat_get_activity(), pg_stat_get_backend_idset(), and pg_stat_get_db_numbackends().
{
pgstat_read_current_status();
return localNumBackends;
}
| PgStat_StatTabEntry* pgstat_fetch_stat_tabentry | ( | Oid | relid | ) |
Definition at line 2174 of file pgstat.c.
References backend_read_statsfile(), hash_search(), MyDatabaseId, NULL, and PgStat_StatDBEntry::tables.
Referenced by pg_stat_get_analyze_count(), pg_stat_get_autoanalyze_count(), pg_stat_get_autovacuum_count(), pg_stat_get_blocks_fetched(), pg_stat_get_blocks_hit(), pg_stat_get_dead_tuples(), pg_stat_get_last_analyze_time(), pg_stat_get_last_autoanalyze_time(), pg_stat_get_last_autovacuum_time(), pg_stat_get_last_vacuum_time(), pg_stat_get_live_tuples(), pg_stat_get_numscans(), pg_stat_get_tuples_deleted(), pg_stat_get_tuples_fetched(), pg_stat_get_tuples_hot_updated(), pg_stat_get_tuples_inserted(), pg_stat_get_tuples_returned(), pg_stat_get_tuples_updated(), and pg_stat_get_vacuum_count().
{
Oid dbid;
PgStat_StatDBEntry *dbentry;
PgStat_StatTabEntry *tabentry;
/*
* If not done for this transaction, read the statistics collector stats
* file into some hash tables.
*/
backend_read_statsfile();
/*
* Lookup our database, then look in its table hash table.
*/
dbid = MyDatabaseId;
dbentry = (PgStat_StatDBEntry *) hash_search(pgStatDBHash,
(void *) &dbid,
HASH_FIND, NULL);
if (dbentry != NULL && dbentry->tables != NULL)
{
tabentry = (PgStat_StatTabEntry *) hash_search(dbentry->tables,
(void *) &relid,
HASH_FIND, NULL);
if (tabentry)
return tabentry;
}
/*
* If we didn't find it, maybe it's a shared table.
*/
dbid = InvalidOid;
dbentry = (PgStat_StatDBEntry *) hash_search(pgStatDBHash,
(void *) &dbid,
HASH_FIND, NULL);
if (dbentry != NULL && dbentry->tables != NULL)
{
tabentry = (PgStat_StatTabEntry *) hash_search(dbentry->tables,
(void *) &relid,
HASH_FIND, NULL);
if (tabentry)
return tabentry;
}
return NULL;
}
| const char* pgstat_get_backend_current_activity | ( | int | pid, | |
| bool | checkUser | |||
| ) |
Definition at line 2826 of file pgstat.c.
References CHECK_FOR_INTERRUPTS, GetUserId(), i, MaxBackends, PgBackendStatus::st_activity, PgBackendStatus::st_changecount, PgBackendStatus::st_procpid, PgBackendStatus::st_userid, and superuser().
Referenced by DeadLockReport().
{
PgBackendStatus *beentry;
int i;
beentry = BackendStatusArray;
for (i = 1; i <= MaxBackends; i++)
{
/*
* Although we expect the target backend's entry to be stable, that
* doesn't imply that anyone else's is. To avoid identifying the
* wrong backend, while we check for a match to the desired PID we
* must follow the protocol of retrying if st_changecount changes
* while we examine the entry, or if it's odd. (This might be
* unnecessary, since fetching or storing an int is almost certainly
* atomic, but let's play it safe.) We use a volatile pointer here to
* ensure the compiler doesn't try to get cute.
*/
volatile PgBackendStatus *vbeentry = beentry;
bool found;
for (;;)
{
int save_changecount = vbeentry->st_changecount;
found = (vbeentry->st_procpid == pid);
if (save_changecount == vbeentry->st_changecount &&
(save_changecount & 1) == 0)
break;
/* Make sure we can break out of loop if stuck... */
CHECK_FOR_INTERRUPTS();
}
if (found)
{
/* Now it is safe to use the non-volatile pointer */
if (checkUser && !superuser() && beentry->st_userid != GetUserId())
return "<insufficient privilege>";
else if (*(beentry->st_activity) == '\0')
return "<command string not enabled>";
else
return beentry->st_activity;
}
beentry++;
}
/* If we get here, caller is in error ... */
return "<backend information not available>";
}
| const char* pgstat_get_crashed_backend_activity | ( | int | pid, | |
| char * | buffer, | |||
| int | buflen | |||
| ) |
Definition at line 2896 of file pgstat.c.
References ascii_safe_strlcpy(), i, MaxBackends, Min, NULL, pgstat_track_activity_query_size, PgBackendStatus::st_activity, and PgBackendStatus::st_procpid.
Referenced by LogChildExit().
{
volatile PgBackendStatus *beentry;
int i;
beentry = BackendStatusArray;
/*
* We probably shouldn't get here before shared memory has been set up,
* but be safe.
*/
if (beentry == NULL || BackendActivityBuffer == NULL)
return NULL;
for (i = 1; i <= MaxBackends; i++)
{
if (beentry->st_procpid == pid)
{
/* Read pointer just once, so it can't change after validation */
const char *activity = beentry->st_activity;
const char *activity_last;
/*
* We mustn't access activity string before we verify that it
* falls within the BackendActivityBuffer. To make sure that the
* entire string including its ending is contained within the
* buffer, subtract one activity length from the buffer size.
*/
activity_last = BackendActivityBuffer + BackendActivityBufferSize
- pgstat_track_activity_query_size;
if (activity < BackendActivityBuffer ||
activity > activity_last)
return NULL;
/* If no string available, no point in a report */
if (activity[0] == '\0')
return NULL;
/*
* Copy only ASCII-safe characters so we don't run into encoding
* problems when reporting the message; and be sure not to run off
* the end of memory.
*/
ascii_safe_strlcpy(buffer, activity,
Min(buflen, pgstat_track_activity_query_size));
return buffer;
}
beentry++;
}
/* PID not found */
return NULL;
}
| static PgStat_StatDBEntry * pgstat_get_db_entry | ( | Oid | databaseid, | |
| bool | create | |||
| ) | [static] |
Definition at line 3397 of file pgstat.c.
References HASH_ENTER, hash_search(), and reset_dbentry_counters().
Referenced by pgstat_recv_analyze(), pgstat_recv_autovac(), pgstat_recv_deadlock(), pgstat_recv_dropdb(), pgstat_recv_funcpurge(), pgstat_recv_funcstat(), pgstat_recv_inquiry(), pgstat_recv_recoveryconflict(), pgstat_recv_resetcounter(), pgstat_recv_resetsinglecounter(), pgstat_recv_tabpurge(), pgstat_recv_tabstat(), pgstat_recv_tempfile(), and pgstat_recv_vacuum().
{
PgStat_StatDBEntry *result;
bool found;
HASHACTION action = (create ? HASH_ENTER : HASH_FIND);
/* Lookup or create the hash table entry for this database */
result = (PgStat_StatDBEntry *) hash_search(pgStatDBHash,
&databaseid,
action, &found);
if (!create && !found)
return NULL;
/*
* If not found, initialize the new one. This creates empty hash tables
* for tables and functions, too.
*/
if (!found)
reset_dbentry_counters(result);
return result;
}
| static PgStat_StatTabEntry * pgstat_get_tab_entry | ( | PgStat_StatDBEntry * | dbentry, | |
| Oid | tableoid, | |||
| bool | create | |||
| ) | [static] |
Definition at line 3428 of file pgstat.c.
References PgStat_StatTabEntry::analyze_count, PgStat_StatTabEntry::analyze_timestamp, PgStat_StatTabEntry::autovac_analyze_count, PgStat_StatTabEntry::autovac_analyze_timestamp, PgStat_StatTabEntry::autovac_vacuum_count, PgStat_StatTabEntry::autovac_vacuum_timestamp, PgStat_StatTabEntry::blocks_fetched, PgStat_StatTabEntry::blocks_hit, PgStat_StatTabEntry::changes_since_analyze, HASH_ENTER, hash_search(), PgStat_StatTabEntry::n_dead_tuples, PgStat_StatTabEntry::n_live_tuples, PgStat_StatTabEntry::numscans, PgStat_StatDBEntry::tables, PgStat_StatTabEntry::tuples_deleted, PgStat_StatTabEntry::tuples_fetched, PgStat_StatTabEntry::tuples_hot_updated, PgStat_StatTabEntry::tuples_inserted, PgStat_StatTabEntry::tuples_returned, PgStat_StatTabEntry::tuples_updated, PgStat_StatTabEntry::vacuum_count, and PgStat_StatTabEntry::vacuum_timestamp.
Referenced by pgstat_recv_analyze(), and pgstat_recv_vacuum().
{
PgStat_StatTabEntry *result;
bool found;
HASHACTION action = (create ? HASH_ENTER : HASH_FIND);
/* Lookup or create the hash table entry for this table */
result = (PgStat_StatTabEntry *) hash_search(dbentry->tables,
&tableoid,
action, &found);
if (!create && !found)
return NULL;
/* If not found, initialize the new one. */
if (!found)
{
result->numscans = 0;
result->tuples_returned = 0;
result->tuples_fetched = 0;
result->tuples_inserted = 0;
result->tuples_updated = 0;
result->tuples_deleted = 0;
result->tuples_hot_updated = 0;
result->n_live_tuples = 0;
result->n_dead_tuples = 0;
result->changes_since_analyze = 0;
result->blocks_fetched = 0;
result->blocks_hit = 0;
result->vacuum_timestamp = 0;
result->vacuum_count = 0;
result->autovac_vacuum_timestamp = 0;
result->autovac_vacuum_count = 0;
result->analyze_timestamp = 0;
result->analyze_count = 0;
result->autovac_analyze_timestamp = 0;
result->autovac_analyze_count = 0;
}
return result;
}
| void pgstat_init | ( | void | ) |
Definition at line 316 of file pgstat.c.
References addrinfo::ai_next, closesocket, connect, EINTR, ereport, errcode(), errcode_for_socket_access(), errmsg(), gai_strerror, LOG, NULL, pg_freeaddrinfo_all(), pg_getaddrinfo_all(), pg_set_noblock(), PGC_INTERNAL, PGC_S_OVERRIDE, PGINVALID_SOCKET, pgStatAddr, pgStatSock, recv, select, send, SetConfigOption(), socket, and TESTBYTEVAL.
Referenced by PostmasterMain().
{
ACCEPT_TYPE_ARG3 alen;
struct addrinfo *addrs = NULL,
*addr,
hints;
int ret;
fd_set rset;
struct timeval tv;
char test_byte;
int sel_res;
int tries = 0;
#define TESTBYTEVAL ((char) 199)
/*
* Create the UDP socket for sending and receiving statistic messages
*/
hints.ai_flags = AI_PASSIVE;
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_protocol = 0;
hints.ai_addrlen = 0;
hints.ai_addr = NULL;
hints.ai_canonname = NULL;
hints.ai_next = NULL;
ret = pg_getaddrinfo_all("localhost", NULL, &hints, &addrs);
if (ret || !addrs)
{
ereport(LOG,
(errmsg("could not resolve \"localhost\": %s",
gai_strerror(ret))));
goto startup_failed;
}
/*
* On some platforms, pg_getaddrinfo_all() may return multiple addresses
* only one of which will actually work (eg, both IPv6 and IPv4 addresses
* when kernel will reject IPv6). Worse, the failure may occur at the
* bind() or perhaps even connect() stage. So we must loop through the
* results till we find a working combination. We will generate LOG
* messages, but no error, for bogus combinations.
*/
for (addr = addrs; addr; addr = addr->ai_next)
{
#ifdef HAVE_UNIX_SOCKETS
/* Ignore AF_UNIX sockets, if any are returned. */
if (addr->ai_family == AF_UNIX)
continue;
#endif
if (++tries > 1)
ereport(LOG,
(errmsg("trying another address for the statistics collector")));
/*
* Create the socket.
*/
if ((pgStatSock = socket(addr->ai_family, SOCK_DGRAM, 0)) == PGINVALID_SOCKET)
{
ereport(LOG,
(errcode_for_socket_access(),
errmsg("could not create socket for statistics collector: %m")));
continue;
}
/*
* Bind it to a kernel assigned port on localhost and get the assigned
* port via getsockname().
*/
if (bind(pgStatSock, addr->ai_addr, addr->ai_addrlen) < 0)
{
ereport(LOG,
(errcode_for_socket_access(),
errmsg("could not bind socket for statistics collector: %m")));
closesocket(pgStatSock);
pgStatSock = PGINVALID_SOCKET;
continue;
}
alen = sizeof(pgStatAddr);
if (getsockname(pgStatSock, (struct sockaddr *) & pgStatAddr, &alen) < 0)
{
ereport(LOG,
(errcode_for_socket_access(),
errmsg("could not get address of socket for statistics collector: %m")));
closesocket(pgStatSock);
pgStatSock = PGINVALID_SOCKET;
continue;
}
/*
* Connect the socket to its own address. This saves a few cycles by
* not having to respecify the target address on every send. This also
* provides a kernel-level check that only packets from this same
* address will be received.
*/
if (connect(pgStatSock, (struct sockaddr *) & pgStatAddr, alen) < 0)
{
ereport(LOG,
(errcode_for_socket_access(),
errmsg("could not connect socket for statistics collector: %m")));
closesocket(pgStatSock);
pgStatSock = PGINVALID_SOCKET;
continue;
}
/*
* Try to send and receive a one-byte test message on the socket. This
* is to catch situations where the socket can be created but will not
* actually pass data (for instance, because kernel packet filtering
* rules prevent it).
*/
test_byte = TESTBYTEVAL;
retry1:
if (send(pgStatSock, &test_byte, 1, 0) != 1)
{
if (errno == EINTR)
goto retry1; /* if interrupted, just retry */
ereport(LOG,
(errcode_for_socket_access(),
errmsg("could not send test message on socket for statistics collector: %m")));
closesocket(pgStatSock);
pgStatSock = PGINVALID_SOCKET;
continue;
}
/*
* There could possibly be a little delay before the message can be
* received. We arbitrarily allow up to half a second before deciding
* it's broken.
*/
for (;;) /* need a loop to handle EINTR */
{
FD_ZERO(&rset);
FD_SET(pgStatSock, &rset);
tv.tv_sec = 0;
tv.tv_usec = 500000;
sel_res = select(pgStatSock + 1, &rset, NULL, NULL, &tv);
if (sel_res >= 0 || errno != EINTR)
break;
}
if (sel_res < 0)
{
ereport(LOG,
(errcode_for_socket_access(),
errmsg("select() failed in statistics collector: %m")));
closesocket(pgStatSock);
pgStatSock = PGINVALID_SOCKET;
continue;
}
if (sel_res == 0 || !FD_ISSET(pgStatSock, &rset))
{
/*
* This is the case we actually think is likely, so take pains to
* give a specific message for it.
*
* errno will not be set meaningfully here, so don't use it.
*/
ereport(LOG,
(errcode(ERRCODE_CONNECTION_FAILURE),
errmsg("test message did not get through on socket for statistics collector")));
closesocket(pgStatSock);
pgStatSock = PGINVALID_SOCKET;
continue;
}
test_byte++; /* just make sure variable is changed */
retry2:
if (recv(pgStatSock, &test_byte, 1, 0) != 1)
{
if (errno == EINTR)
goto retry2; /* if interrupted, just retry */
ereport(LOG,
(errcode_for_socket_access(),
errmsg("could not receive test message on socket for statistics collector: %m")));
closesocket(pgStatSock);
pgStatSock = PGINVALID_SOCKET;
continue;
}
if (test_byte != TESTBYTEVAL) /* strictly paranoia ... */
{
ereport(LOG,
(errcode(ERRCODE_INTERNAL_ERROR),
errmsg("incorrect test message transmission on socket for statistics collector")));
closesocket(pgStatSock);
pgStatSock = PGINVALID_SOCKET;
continue;
}
/* If we get here, we have a working socket */
break;
}
/* Did we find a working address? */
if (!addr || pgStatSock == PGINVALID_SOCKET)
goto startup_failed;
/*
* Set the socket to non-blocking IO. This ensures that if the collector
* falls behind, statistics messages will be discarded; backends won't
* block waiting to send messages to the collector.
*/
if (!pg_set_noblock(pgStatSock))
{
ereport(LOG,
(errcode_for_socket_access(),
errmsg("could not set statistics collector socket to nonblocking mode: %m")));
goto startup_failed;
}
pg_freeaddrinfo_all(hints.ai_family, addrs);
return;
startup_failed:
ereport(LOG,
(errmsg("disabling statistics collector for lack of working socket")));
if (addrs)
pg_freeaddrinfo_all(hints.ai_family, addrs);
if (pgStatSock != PGINVALID_SOCKET)
closesocket(pgStatSock);
pgStatSock = PGINVALID_SOCKET;
/*
* Adjust GUC variables to suppress useless activity, and for debugging
* purposes (seeing track_counts off is a clue that we failed here). We
* use PGC_S_OVERRIDE because there is no point in trying to turn it back
* on from postgresql.conf without a restart.
*/
SetConfigOption("track_counts", "off", PGC_INTERNAL, PGC_S_OVERRIDE);
}
| void pgstat_init_function_usage | ( | FunctionCallInfoData * | fcinfo, | |
| PgStat_FunctionCallUsage * | fcu | |||
| ) |
Definition at line 1465 of file pgstat.c.
References HASHCTL::entrysize, PgStat_BackendFunctionEntry::f_counts, PgStat_FunctionCallUsage::f_start, PgStat_FunctionCounts::f_total_time, FunctionCallInfoData::flinfo, FmgrInfo::fn_oid, PgStat_FunctionCallUsage::fs, HASHCTL::hash, hash_create(), HASH_ELEM, HASH_ENTER, HASH_FUNCTION, hash_search(), INSTR_TIME_SET_CURRENT, HASHCTL::keysize, MemSet, PGSTAT_FUNCTION_HASH_SIZE, PgStat_FunctionCallUsage::save_f_total_time, PgStat_FunctionCallUsage::save_total, and total_func_time.
Referenced by EventTriggerInvoke(), ExecCallTriggerFunc(), ExecMakeFunctionResult(), ExecMakeFunctionResultNoSets(), ExecMakeTableFunctionResult(), and fmgr_security_definer().
{
PgStat_BackendFunctionEntry *htabent;
bool found;
if (pgstat_track_functions <= fcinfo->flinfo->fn_stats)
{
/* stats not wanted */
fcu->fs = NULL;
return;
}
if (!pgStatFunctions)
{
/* First time through - initialize function stat table */
HASHCTL hash_ctl;
memset(&hash_ctl, 0, sizeof(hash_ctl));
hash_ctl.keysize = sizeof(Oid);
hash_ctl.entrysize = sizeof(PgStat_BackendFunctionEntry);
hash_ctl.hash = oid_hash;
pgStatFunctions = hash_create("Function stat entries",
PGSTAT_FUNCTION_HASH_SIZE,
&hash_ctl,
HASH_ELEM | HASH_FUNCTION);
}
/* Get the stats entry for this function, create if necessary */
htabent = hash_search(pgStatFunctions, &fcinfo->flinfo->fn_oid,
HASH_ENTER, &found);
if (!found)
MemSet(&htabent->f_counts, 0, sizeof(PgStat_FunctionCounts));
fcu->fs = &htabent->f_counts;
/* save stats for this function, later used to compensate for recursion */
fcu->save_f_total_time = htabent->f_counts.f_total_time;
/* save current backend-wide total time */
fcu->save_total = total_func_time;
/* get clock time as of function start */
INSTR_TIME_SET_CURRENT(fcu->f_start);
}
| void pgstat_initialize | ( | void | ) |
Definition at line 2431 of file pgstat.c.
References Assert, MaxBackends, MyBackendId, on_shmem_exit(), and pgstat_beshutdown_hook().
Referenced by InitPostgres().
{
/* Initialize MyBEEntry */
Assert(MyBackendId >= 1 && MyBackendId <= MaxBackends);
MyBEEntry = &BackendStatusArray[MyBackendId - 1];
/* Set up a process-exit hook to clean up */
on_shmem_exit(pgstat_beshutdown_hook, 0);
}
| void pgstat_initstats | ( | Relation | rel | ) |
Definition at line 1595 of file pgstat.c.
References get_tabstat_entry(), NULL, PGINVALID_SOCKET, RelationData::pgstat_info, pgstat_track_counts, pgStatSock, RelationData::rd_id, RelationData::rd_rel, RELKIND_INDEX, RELKIND_MATVIEW, RELKIND_RELATION, RELKIND_SEQUENCE, RELKIND_TOASTVALUE, and PgStat_TableStatus::t_id.
Referenced by relation_open(), and try_relation_open().
{
Oid rel_id = rel->rd_id;
char relkind = rel->rd_rel->relkind;
/* We only count stats for things that have storage */
if (!(relkind == RELKIND_RELATION ||
relkind == RELKIND_MATVIEW ||
relkind == RELKIND_INDEX ||
relkind == RELKIND_TOASTVALUE ||
relkind == RELKIND_SEQUENCE))
{
rel->pgstat_info = NULL;
return;
}
if (pgStatSock == PGINVALID_SOCKET || !pgstat_track_counts)
{
/* We're not counting at all */
rel->pgstat_info = NULL;
return;
}
/*
* If we already set up this relation in the current transaction, nothing
* to do.
*/
if (rel->pgstat_info != NULL &&
rel->pgstat_info->t_id == rel_id)
return;
/* Else find or make the PgStat_TableStatus entry, and update link */
rel->pgstat_info = get_tabstat_entry(rel_id, rel->rd_rel->relisshared);
}
| void pgstat_ping | ( | void | ) |
Definition at line 1430 of file pgstat.c.
References PgStat_MsgDummy::m_hdr, PGINVALID_SOCKET, PGSTAT_MTYPE_DUMMY, pgstat_send(), pgstat_setheader(), and pgStatSock.
{
PgStat_MsgDummy msg;
if (pgStatSock == PGINVALID_SOCKET)
return;
pgstat_setheader(&msg.m_hdr, PGSTAT_MTYPE_DUMMY);
pgstat_send(&msg, sizeof(msg));
}
| static void pgstat_read_current_status | ( | void | ) | [static] |
Definition at line 2726 of file pgstat.c.
References Assert, CHECK_FOR_INTERRUPTS, i, localNumBackends, MaxBackends, MemoryContextAlloc(), NAMEDATALEN, pgstat_setup_memcxt(), pgstat_track_activity_query_size, pgStatRunningInCollector, PgBackendStatus::st_activity, PgBackendStatus::st_appname, PgBackendStatus::st_changecount, and PgBackendStatus::st_procpid.
Referenced by pgstat_fetch_stat_beentry(), and pgstat_fetch_stat_numbackends().
{
volatile PgBackendStatus *beentry;
PgBackendStatus *localtable;
PgBackendStatus *localentry;
char *localappname,
*localactivity;
int i;
Assert(!pgStatRunningInCollector);
if (localBackendStatusTable)
return; /* already done */
pgstat_setup_memcxt();
localtable = (PgBackendStatus *)
MemoryContextAlloc(pgStatLocalContext,
sizeof(PgBackendStatus) * MaxBackends);
localappname = (char *)
MemoryContextAlloc(pgStatLocalContext,
NAMEDATALEN * MaxBackends);
localactivity = (char *)
MemoryContextAlloc(pgStatLocalContext,
pgstat_track_activity_query_size * MaxBackends);
localNumBackends = 0;
beentry = BackendStatusArray;
localentry = localtable;
for (i = 1; i <= MaxBackends; i++)
{
/*
* Follow the protocol of retrying if st_changecount changes while we
* copy the entry, or if it's odd. (The check for odd is needed to
* cover the case where we are able to completely copy the entry while
* the source backend is between increment steps.) We use a volatile
* pointer here to ensure the compiler doesn't try to get cute.
*/
for (;;)
{
int save_changecount = beentry->st_changecount;
localentry->st_procpid = beentry->st_procpid;
if (localentry->st_procpid > 0)
{
memcpy(localentry, (char *) beentry, sizeof(PgBackendStatus));
/*
* strcpy is safe even if the string is modified concurrently,
* because there's always a \0 at the end of the buffer.
*/
strcpy(localappname, (char *) beentry->st_appname);
localentry->st_appname = localappname;
strcpy(localactivity, (char *) beentry->st_activity);
localentry->st_activity = localactivity;
}
if (save_changecount == beentry->st_changecount &&
(save_changecount & 1) == 0)
break;
/* Make sure we can break out of loop if stuck... */
CHECK_FOR_INTERRUPTS();
}
beentry++;
/* Only valid entries get included into the local array */
if (localentry->st_procpid > 0)
{
localentry++;
localappname += NAMEDATALEN;
localactivity += pgstat_track_activity_query_size;
localNumBackends++;
}
}
/* Set the pointer only after completion of a valid table */
localBackendStatusTable = localtable;
}
| static void pgstat_read_db_statsfile | ( | Oid | databaseid, | |
| HTAB * | tabhash, | |||
| HTAB * | funchash, | |||
| bool | permanent | |||
| ) | [static] |
Definition at line 3959 of file pgstat.c.
References AllocateFile(), DEBUG2, elog, ereport, errcode_for_file_access(), errmsg(), FreeFile(), PgStat_StatFuncEntry::functionid, get_dbstat_filename(), hash_search(), LOG, MAXPGPATH, NULL, PG_BINARY_R, PGSTAT_FILE_FORMAT_ID, pgStatRunningInCollector, PgStat_StatTabEntry::tableid, unlink(), and WARNING.
Referenced by pgstat_read_statsfiles().
{
PgStat_StatTabEntry *tabentry;
PgStat_StatTabEntry tabbuf;
PgStat_StatFuncEntry funcbuf;
PgStat_StatFuncEntry *funcentry;
FILE *fpin;
int32 format_id;
bool found;
char statfile[MAXPGPATH];
get_dbstat_filename(permanent, false, databaseid, statfile, MAXPGPATH);
/*
* Try to open the stats file. If it doesn't exist, the backends simply
* return zero for anything and the collector simply starts from scratch
* with empty counters.
*
* ENOENT is a possibility if the stats collector is not running or has
* not yet written the stats file the first time. Any other failure
* condition is suspicious.
*/
if ((fpin = AllocateFile(statfile, PG_BINARY_R)) == NULL)
{
if (errno != ENOENT)
ereport(pgStatRunningInCollector ? LOG : WARNING,
(errcode_for_file_access(),
errmsg("could not open statistics file \"%s\": %m",
statfile)));
return;
}
/*
* Verify it's of the expected format.
*/
if (fread(&format_id, 1, sizeof(format_id), fpin) != sizeof(format_id) ||
format_id != PGSTAT_FILE_FORMAT_ID)
{
ereport(pgStatRunningInCollector ? LOG : WARNING,
(errmsg("corrupted statistics file \"%s\"", statfile)));
goto done;
}
/*
* We found an existing collector stats file. Read it and put all the
* hashtable entries into place.
*/
for (;;)
{
switch (fgetc(fpin))
{
/*
* 'T' A PgStat_StatTabEntry follows.
*/
case 'T':
if (fread(&tabbuf, 1, sizeof(PgStat_StatTabEntry),
fpin) != sizeof(PgStat_StatTabEntry))
{
ereport(pgStatRunningInCollector ? LOG : WARNING,
(errmsg("corrupted statistics file \"%s\"",
statfile)));
goto done;
}
/*
* Skip if table belongs to a not requested database.
*/
if (tabhash == NULL)
break;
tabentry = (PgStat_StatTabEntry *) hash_search(tabhash,
(void *) &tabbuf.tableid,
HASH_ENTER, &found);
if (found)
{
ereport(pgStatRunningInCollector ? LOG : WARNING,
(errmsg("corrupted statistics file \"%s\"",
statfile)));
goto done;
}
memcpy(tabentry, &tabbuf, sizeof(tabbuf));
break;
/*
* 'F' A PgStat_StatFuncEntry follows.
*/
case 'F':
if (fread(&funcbuf, 1, sizeof(PgStat_StatFuncEntry),
fpin) != sizeof(PgStat_StatFuncEntry))
{
ereport(pgStatRunningInCollector ? LOG : WARNING,
(errmsg("corrupted statistics file \"%s\"",
statfile)));
goto done;
}
/*
* Skip if function belongs to a not requested database.
*/
if (funchash == NULL)
break;
funcentry = (PgStat_StatFuncEntry *) hash_search(funchash,
(void *) &funcbuf.functionid,
HASH_ENTER, &found);
if (found)
{
ereport(pgStatRunningInCollector ? LOG : WARNING,
(errmsg("corrupted statistics file \"%s\"",
statfile)));
goto done;
}
memcpy(funcentry, &funcbuf, sizeof(funcbuf));
break;
/*
* 'E' The EOF marker of a complete stats file.
*/
case 'E':
goto done;
default:
ereport(pgStatRunningInCollector ? LOG : WARNING,
(errmsg("corrupted statistics file \"%s\"",
statfile)));
goto done;
}
}
done:
FreeFile(fpin);
if (permanent)
{
elog(DEBUG2, "removing permanent stats file '%s'", statfile);
unlink(statfile);
}
return;
}
| static bool pgstat_read_db_statsfile_timestamp | ( | Oid | databaseid, | |
| bool | permanent, | |||
| TimestampTz * | ts | |||
| ) | [static] |
Definition at line 4123 of file pgstat.c.
References AllocateFile(), PgStat_StatDBEntry::databaseid, ereport, errcode_for_file_access(), errmsg(), FreeFile(), LOG, NULL, offsetof, PG_BINARY_R, PGSTAT_FILE_FORMAT_ID, pgstat_stat_filename, PGSTAT_STAT_PERMANENT_FILENAME, pgStatRunningInCollector, PgStat_StatDBEntry::stats_timestamp, PgStat_GlobalStats::stats_timestamp, and WARNING.
Referenced by backend_read_statsfile().
{
PgStat_StatDBEntry dbentry;
PgStat_GlobalStats myGlobalStats;
FILE *fpin;
int32 format_id;
const char *statfile = permanent ? PGSTAT_STAT_PERMANENT_FILENAME : pgstat_stat_filename;
/*
* Try to open the stats file. As above, anything but ENOENT is worthy of
* complaining about.
*/
if ((fpin = AllocateFile(statfile, PG_BINARY_R)) == NULL)
{
if (errno != ENOENT)
ereport(pgStatRunningInCollector ? LOG : WARNING,
(errcode_for_file_access(),
errmsg("could not open statistics file \"%s\": %m",
statfile)));
return false;
}
/*
* Verify it's of the expected format.
*/
if (fread(&format_id, 1, sizeof(format_id), fpin) != sizeof(format_id) ||
format_id != PGSTAT_FILE_FORMAT_ID)
{
ereport(pgStatRunningInCollector ? LOG : WARNING,
(errmsg("corrupted statistics file \"%s\"", statfile)));
FreeFile(fpin);
return false;
}
/*
* Read global stats struct
*/
if (fread(&myGlobalStats, 1, sizeof(myGlobalStats),
fpin) != sizeof(myGlobalStats))
{
ereport(pgStatRunningInCollector ? LOG : WARNING,
(errmsg("corrupted statistics file \"%s\"", statfile)));
FreeFile(fpin);
return false;
}
/* By default, we're going to return the timestamp of the global file. */
*ts = myGlobalStats.stats_timestamp;
/*
* We found an existing collector stats file. Read it and look for a
* record for the requested database. If found, use its timestamp.
*/
for (;;)
{
switch (fgetc(fpin))
{
/*
* 'D' A PgStat_StatDBEntry struct describing a database
* follows.
*/
case 'D':
if (fread(&dbentry, 1, offsetof(PgStat_StatDBEntry, tables),
fpin) != offsetof(PgStat_StatDBEntry, tables))
{
ereport(pgStatRunningInCollector ? LOG : WARNING,
(errmsg("corrupted statistics file \"%s\"",
statfile)));
goto done;
}
/*
* If this is the DB we're looking for, save its timestamp and
* we're done.
*/
if (dbentry.databaseid == databaseid)
{
*ts = dbentry.stats_timestamp;
goto done;
}
break;
case 'E':
goto done;
default:
ereport(pgStatRunningInCollector ? LOG : WARNING,
(errmsg("corrupted statistics file \"%s\"",
statfile)));
goto done;
}
}
done:
FreeFile(fpin);
return true;
}
Definition at line 3759 of file pgstat.c.
References AllocateFile(), PgStat_StatDBEntry::databaseid, DEBUG2, elog, HASHCTL::entrysize, ereport, errcode_for_file_access(), errmsg(), FreeFile(), PgStat_StatDBEntry::functions, GetCurrentTimestamp(), HASHCTL::hash, HASH_CONTEXT, hash_create(), HASH_ELEM, HASH_FUNCTION, hash_search(), HASHCTL::hcxt, InvalidOid, HASHCTL::keysize, LOG, NULL, offsetof, PG_BINARY_R, PGSTAT_DB_HASH_SIZE, PGSTAT_FILE_FORMAT_ID, PGSTAT_FUNCTION_HASH_SIZE, pgstat_read_db_statsfile(), pgstat_setup_memcxt(), pgstat_stat_filename, PGSTAT_STAT_PERMANENT_FILENAME, PGSTAT_TAB_HASH_SIZE, pgStatRunningInCollector, PgStat_GlobalStats::stat_reset_timestamp, PgStat_StatDBEntry::tables, unlink(), and WARNING.
Referenced by backend_read_statsfile(), and PgstatCollectorMain().
{
PgStat_StatDBEntry *dbentry;
PgStat_StatDBEntry dbbuf;
HASHCTL hash_ctl;
HTAB *dbhash;
FILE *fpin;
int32 format_id;
bool found;
const char *statfile = permanent ? PGSTAT_STAT_PERMANENT_FILENAME : pgstat_stat_filename;
/*
* The tables will live in pgStatLocalContext.
*/
pgstat_setup_memcxt();
/*
* Create the DB hashtable
*/
memset(&hash_ctl, 0, sizeof(hash_ctl));
hash_ctl.keysize = sizeof(Oid);
hash_ctl.entrysize = sizeof(PgStat_StatDBEntry);
hash_ctl.hash = oid_hash;
hash_ctl.hcxt = pgStatLocalContext;
dbhash = hash_create("Databases hash", PGSTAT_DB_HASH_SIZE, &hash_ctl,
HASH_ELEM | HASH_FUNCTION | HASH_CONTEXT);
/*
* Clear out global statistics so they start from zero in case we can't
* load an existing statsfile.
*/
memset(&globalStats, 0, sizeof(globalStats));
/*
* Set the current timestamp (will be kept only in case we can't load an
* existing statsfile).
*/
globalStats.stat_reset_timestamp = GetCurrentTimestamp();
/*
* Try to open the stats file. If it doesn't exist, the backends simply
* return zero for anything and the collector simply starts from scratch
* with empty counters.
*
* ENOENT is a possibility if the stats collector is not running or has
* not yet written the stats file the first time. Any other failure
* condition is suspicious.
*/
if ((fpin = AllocateFile(statfile, PG_BINARY_R)) == NULL)
{
if (errno != ENOENT)
ereport(pgStatRunningInCollector ? LOG : WARNING,
(errcode_for_file_access(),
errmsg("could not open statistics file \"%s\": %m",
statfile)));
return dbhash;
}
/*
* Verify it's of the expected format.
*/
if (fread(&format_id, 1, sizeof(format_id), fpin) != sizeof(format_id) ||
format_id != PGSTAT_FILE_FORMAT_ID)
{
ereport(pgStatRunningInCollector ? LOG : WARNING,
(errmsg("corrupted statistics file \"%s\"", statfile)));
goto done;
}
/*
* Read global stats struct
*/
if (fread(&globalStats, 1, sizeof(globalStats), fpin) != sizeof(globalStats))
{
ereport(pgStatRunningInCollector ? LOG : WARNING,
(errmsg("corrupted statistics file \"%s\"", statfile)));
goto done;
}
/*
* We found an existing collector stats file. Read it and put all the
* hashtable entries into place.
*/
for (;;)
{
switch (fgetc(fpin))
{
/*
* 'D' A PgStat_StatDBEntry struct describing a database
* follows.
*/
case 'D':
if (fread(&dbbuf, 1, offsetof(PgStat_StatDBEntry, tables),
fpin) != offsetof(PgStat_StatDBEntry, tables))
{
ereport(pgStatRunningInCollector ? LOG : WARNING,
(errmsg("corrupted statistics file \"%s\"",
statfile)));
goto done;
}
/*
* Add to the DB hash
*/
dbentry = (PgStat_StatDBEntry *) hash_search(dbhash,
(void *) &dbbuf.databaseid,
HASH_ENTER,
&found);
if (found)
{
ereport(pgStatRunningInCollector ? LOG : WARNING,
(errmsg("corrupted statistics file \"%s\"",
statfile)));
goto done;
}
memcpy(dbentry, &dbbuf, sizeof(PgStat_StatDBEntry));
dbentry->tables = NULL;
dbentry->functions = NULL;
/*
* Don't collect tables if not the requested DB (or the
* shared-table info)
*/
if (onlydb != InvalidOid)
{
if (dbbuf.databaseid != onlydb &&
dbbuf.databaseid != InvalidOid)
break;
}
memset(&hash_ctl, 0, sizeof(hash_ctl));
hash_ctl.keysize = sizeof(Oid);
hash_ctl.entrysize = sizeof(PgStat_StatTabEntry);
hash_ctl.hash = oid_hash;
hash_ctl.hcxt = pgStatLocalContext;
dbentry->tables = hash_create("Per-database table",
PGSTAT_TAB_HASH_SIZE,
&hash_ctl,
HASH_ELEM | HASH_FUNCTION | HASH_CONTEXT);
hash_ctl.keysize = sizeof(Oid);
hash_ctl.entrysize = sizeof(PgStat_StatFuncEntry);
hash_ctl.hash = oid_hash;
hash_ctl.hcxt = pgStatLocalContext;
dbentry->functions = hash_create("Per-database function",
PGSTAT_FUNCTION_HASH_SIZE,
&hash_ctl,
HASH_ELEM | HASH_FUNCTION | HASH_CONTEXT);
/*
* If requested, read the data from the database-specific
* file. If there was onlydb specified (!= InvalidOid), we
* would not get here because of a break above. So we don't
* need to recheck.
*/
if (deep)
pgstat_read_db_statsfile(dbentry->databaseid,
dbentry->tables,
dbentry->functions,
permanent);
break;
case 'E':
goto done;
default:
ereport(pgStatRunningInCollector ? LOG : WARNING,
(errmsg("corrupted statistics file \"%s\"",
statfile)));
goto done;
}
}
done:
FreeFile(fpin);
/* If requested to read the permanent file, also get rid of it. */
if (permanent)
{
elog(DEBUG2, "removing permanent stats file '%s'", statfile);
unlink(statfile);
}
return dbhash;
}
| static void pgstat_recv_analyze | ( | PgStat_MsgAnalyze * | msg, | |
| int | len | |||
| ) | [static] |
Definition at line 4793 of file pgstat.c.
References PgStat_StatTabEntry::analyze_count, PgStat_StatTabEntry::analyze_timestamp, PgStat_StatTabEntry::autovac_analyze_count, PgStat_StatTabEntry::autovac_analyze_timestamp, PgStat_StatTabEntry::changes_since_analyze, PgStat_MsgAnalyze::m_analyzetime, PgStat_MsgAnalyze::m_autovacuum, PgStat_MsgAnalyze::m_databaseid, PgStat_MsgAnalyze::m_dead_tuples, PgStat_MsgAnalyze::m_live_tuples, PgStat_MsgAnalyze::m_tableoid, PgStat_StatTabEntry::n_dead_tuples, PgStat_StatTabEntry::n_live_tuples, pgstat_get_db_entry(), and pgstat_get_tab_entry().
Referenced by PgstatCollectorMain().
{
PgStat_StatDBEntry *dbentry;
PgStat_StatTabEntry *tabentry;
/*
* Store the data in the table's hashtable entry.
*/
dbentry = pgstat_get_db_entry(msg->m_databaseid, true);
tabentry = pgstat_get_tab_entry(dbentry, msg->m_tableoid, true);
tabentry->n_live_tuples = msg->m_live_tuples;
tabentry->n_dead_tuples = msg->m_dead_tuples;
/*
* We reset changes_since_analyze to zero, forgetting any changes that
* occurred while the ANALYZE was in progress.
*/
tabentry->changes_since_analyze = 0;
if (msg->m_autovacuum)
{
tabentry->autovac_analyze_timestamp = msg->m_analyzetime;
tabentry->autovac_analyze_count++;
}
else
{
tabentry->analyze_timestamp = msg->m_analyzetime;
tabentry->analyze_count++;
}
}
| static void pgstat_recv_autovac | ( | PgStat_MsgAutovacStart * | msg, | |
| int | len | |||
| ) | [static] |
Definition at line 4739 of file pgstat.c.
References PgStat_StatDBEntry::last_autovac_time, PgStat_MsgAutovacStart::m_databaseid, PgStat_MsgAutovacStart::m_start_time, and pgstat_get_db_entry().
Referenced by PgstatCollectorMain().
{
PgStat_StatDBEntry *dbentry;
/*
* Store the last autovacuum time in the database's hashtable entry.
*/
dbentry = pgstat_get_db_entry(msg->m_databaseid, true);
dbentry->last_autovac_time = msg->m_start_time;
}
| static void pgstat_recv_bgwriter | ( | PgStat_MsgBgWriter * | msg, | |
| int | len | |||
| ) | [static] |
Definition at line 4834 of file pgstat.c.
References PgStat_GlobalStats::buf_alloc, PgStat_GlobalStats::buf_fsync_backend, PgStat_GlobalStats::buf_written_backend, PgStat_GlobalStats::buf_written_checkpoints, PgStat_GlobalStats::buf_written_clean, PgStat_GlobalStats::checkpoint_sync_time, PgStat_GlobalStats::checkpoint_write_time, PgStat_MsgBgWriter::m_buf_alloc, PgStat_MsgBgWriter::m_buf_fsync_backend, PgStat_MsgBgWriter::m_buf_written_backend, PgStat_MsgBgWriter::m_buf_written_checkpoints, PgStat_MsgBgWriter::m_buf_written_clean, PgStat_MsgBgWriter::m_checkpoint_sync_time, PgStat_MsgBgWriter::m_checkpoint_write_time, PgStat_MsgBgWriter::m_maxwritten_clean, PgStat_MsgBgWriter::m_requested_checkpoints, PgStat_MsgBgWriter::m_timed_checkpoints, PgStat_GlobalStats::maxwritten_clean, PgStat_GlobalStats::requested_checkpoints, and PgStat_GlobalStats::timed_checkpoints.
Referenced by PgstatCollectorMain().
{
globalStats.timed_checkpoints += msg->m_timed_checkpoints;
globalStats.requested_checkpoints += msg->m_requested_checkpoints;
globalStats.checkpoint_write_time += msg->m_checkpoint_write_time;
globalStats.checkpoint_sync_time += msg->m_checkpoint_sync_time;
globalStats.buf_written_checkpoints += msg->m_buf_written_checkpoints;
globalStats.buf_written_clean += msg->m_buf_written_clean;
globalStats.maxwritten_clean += msg->m_maxwritten_clean;
globalStats.buf_written_backend += msg->m_buf_written_backend;
globalStats.buf_fsync_backend += msg->m_buf_fsync_backend;
globalStats.buf_alloc += msg->m_buf_alloc;
}
| static void pgstat_recv_deadlock | ( | PgStat_MsgDeadlock * | msg, | |
| int | len | |||
| ) | [static] |
Definition at line 4895 of file pgstat.c.
References PgStat_MsgDeadlock::m_databaseid, PgStat_StatDBEntry::n_deadlocks, and pgstat_get_db_entry().
Referenced by PgstatCollectorMain().
{
PgStat_StatDBEntry *dbentry;
dbentry = pgstat_get_db_entry(msg->m_databaseid, true);
dbentry->n_deadlocks++;
}
| static void pgstat_recv_dropdb | ( | PgStat_MsgDropdb * | msg, | |
| int | len | |||
| ) | [static] |
Definition at line 4608 of file pgstat.c.
References DEBUG2, elog, ereport, errmsg(), ERROR, PgStat_StatDBEntry::functions, get_dbstat_filename(), hash_destroy(), HASH_REMOVE, hash_search(), PgStat_MsgDropdb::m_databaseid, MAXPGPATH, NULL, pgstat_get_db_entry(), PgStat_StatDBEntry::tables, and unlink().
Referenced by PgstatCollectorMain().
{
Oid dbid = msg->m_databaseid;
PgStat_StatDBEntry *dbentry;
/*
* Lookup the database in the hashtable.
*/
dbentry = pgstat_get_db_entry(dbid, false);
/*
* If found, remove it (along with the db statfile).
*/
if (dbentry)
{
char statfile[MAXPGPATH];
get_dbstat_filename(true, false, dbid, statfile, MAXPGPATH);
elog(DEBUG2, "removing %s", statfile);
unlink(statfile);
if (dbentry->tables != NULL)
hash_destroy(dbentry->tables);
if (dbentry->functions != NULL)
hash_destroy(dbentry->functions);
if (hash_search(pgStatDBHash,
(void *) &dbid,
HASH_REMOVE, NULL) == NULL)
ereport(ERROR,
(errmsg("database hash table corrupted during cleanup --- abort")));
}
}
| static void pgstat_recv_funcpurge | ( | PgStat_MsgFuncpurge * | msg, | |
| int | len | |||
| ) | [static] |
Definition at line 4976 of file pgstat.c.
References PgStat_StatDBEntry::functions, HASH_REMOVE, hash_search(), i, PgStat_MsgFuncpurge::m_databaseid, PgStat_MsgFuncpurge::m_functionid, PgStat_MsgFuncpurge::m_nentries, NULL, and pgstat_get_db_entry().
Referenced by PgstatCollectorMain().
{
PgStat_StatDBEntry *dbentry;
int i;
dbentry = pgstat_get_db_entry(msg->m_databaseid, false);
/*
* No need to purge if we don't even know the database.
*/
if (!dbentry || !dbentry->functions)
return;
/*
* Process all function entries in the message.
*/
for (i = 0; i < msg->m_nentries; i++)
{
/* Remove from hashtable if present; we don't care if it's not. */
(void) hash_search(dbentry->functions,
(void *) &(msg->m_functionid[i]),
HASH_REMOVE, NULL);
}
}
| static void pgstat_recv_funcstat | ( | PgStat_MsgFuncstat * | msg, | |
| int | len | |||
| ) | [static] |
Definition at line 4928 of file pgstat.c.
References PgStat_FunctionEntry::f_id, PgStat_FunctionEntry::f_numcalls, PgStat_StatFuncEntry::f_numcalls, PgStat_FunctionEntry::f_self_time, PgStat_StatFuncEntry::f_self_time, PgStat_FunctionEntry::f_total_time, PgStat_StatFuncEntry::f_total_time, PgStat_StatDBEntry::functions, HASH_ENTER, hash_search(), i, PgStat_MsgFuncstat::m_databaseid, PgStat_MsgFuncstat::m_entry, PgStat_MsgFuncstat::m_nentries, and pgstat_get_db_entry().
Referenced by PgstatCollectorMain().
{
PgStat_FunctionEntry *funcmsg = &(msg->m_entry[0]);
PgStat_StatDBEntry *dbentry;
PgStat_StatFuncEntry *funcentry;
int i;
bool found;
dbentry = pgstat_get_db_entry(msg->m_databaseid, true);
/*
* Process all function entries in the message.
*/
for (i = 0; i < msg->m_nentries; i++, funcmsg++)
{
funcentry = (PgStat_StatFuncEntry *) hash_search(dbentry->functions,
(void *) &(funcmsg->f_id),
HASH_ENTER, &found);
if (!found)
{
/*
* If it's a new function entry, initialize counters to the values
* we just got.
*/
funcentry->f_numcalls = funcmsg->f_numcalls;
funcentry->f_total_time = funcmsg->f_total_time;
funcentry->f_self_time = funcmsg->f_self_time;
}
else
{
/*
* Otherwise add the values to the existing entry.
*/
funcentry->f_numcalls += funcmsg->f_numcalls;
funcentry->f_total_time += funcmsg->f_total_time;
funcentry->f_self_time += funcmsg->f_self_time;
}
}
}
| static void pgstat_recv_inquiry | ( | PgStat_MsgInquiry * | msg, | |
| int | len | |||
| ) | [static] |
Definition at line 4391 of file pgstat.c.
References PgStat_MsgInquiry::clock_time, slist_iter::cur, PgStat_MsgInquiry::cutoff_time, PgStat_StatDBEntry::databaseid, DBWriteRequest::databaseid, PgStat_MsgInquiry::databaseid, DEBUG2, elog, GetCurrentTimestamp(), LOG, DBWriteRequest::next, next(), NULL, palloc(), pfree(), pgstat_get_db_entry(), pstrdup(), DBWriteRequest::request_time, slist_container, slist_foreach, slist_push_head(), PgStat_StatDBEntry::stats_timestamp, and timestamptz_to_str().
Referenced by PgstatCollectorMain().
{
slist_iter iter;
DBWriteRequest *newreq;
PgStat_StatDBEntry *dbentry;
elog(DEBUG2, "received inquiry for %d", msg->databaseid);
/*
* Find the last write request for this DB. If it's older than the
* request's cutoff time, update it; otherwise there's nothing to do.
*
* Note that if a request is found, we return early and skip the below
* check for clock skew. This is okay, since the only way for a DB request
* to be present in the list is that we have been here since the last write
* round.
*/
slist_foreach(iter, &last_statrequests)
{
DBWriteRequest *req = slist_container(DBWriteRequest, next, iter.cur);
if (req->databaseid != msg->databaseid)
continue;
if (msg->cutoff_time > req->request_time)
req->request_time = msg->cutoff_time;
return;
}
/*
* There's no request for this DB yet, so create one.
*/
newreq = palloc(sizeof(DBWriteRequest));
newreq->databaseid = msg->databaseid;
newreq->request_time = msg->clock_time;
slist_push_head(&last_statrequests, &newreq->next);
/*
* If the requestor's local clock time is older than stats_timestamp, we
* should suspect a clock glitch, ie system time going backwards; though
* the more likely explanation is just delayed message receipt. It is
* worth expending a GetCurrentTimestamp call to be sure, since a large
* retreat in the system clock reading could otherwise cause us to neglect
* to update the stats file for a long time.
*/
dbentry = pgstat_get_db_entry(msg->databaseid, false);
if ((dbentry != NULL) && (msg->clock_time < dbentry->stats_timestamp))
{
TimestampTz cur_ts = GetCurrentTimestamp();
if (cur_ts < dbentry->stats_timestamp)
{
/*
* Sure enough, time went backwards. Force a new stats file write
* to get back in sync; but first, log a complaint.
*/
char *writetime;
char *mytime;
/* Copy because timestamptz_to_str returns a static buffer */
writetime = pstrdup(timestamptz_to_str(dbentry->stats_timestamp));
mytime = pstrdup(timestamptz_to_str(cur_ts));
elog(LOG,
"stats_timestamp %s is later than collector's time %s for db %d",
writetime, mytime, dbentry->databaseid);
pfree(writetime);
pfree(mytime);
newreq->request_time = cur_ts;
dbentry->stats_timestamp = cur_ts - 1;
}
}
}
| static void pgstat_recv_recoveryconflict | ( | PgStat_MsgRecoveryConflict * | msg, | |
| int | len | |||
| ) | [static] |
Definition at line 4855 of file pgstat.c.
References PgStat_MsgRecoveryConflict::m_databaseid, PgStat_MsgRecoveryConflict::m_reason, PgStat_StatDBEntry::n_conflict_bufferpin, PgStat_StatDBEntry::n_conflict_lock, PgStat_StatDBEntry::n_conflict_snapshot, PgStat_StatDBEntry::n_conflict_startup_deadlock, PgStat_StatDBEntry::n_conflict_tablespace, pgstat_get_db_entry(), PROCSIG_RECOVERY_CONFLICT_BUFFERPIN, PROCSIG_RECOVERY_CONFLICT_DATABASE, PROCSIG_RECOVERY_CONFLICT_LOCK, PROCSIG_RECOVERY_CONFLICT_SNAPSHOT, PROCSIG_RECOVERY_CONFLICT_STARTUP_DEADLOCK, and PROCSIG_RECOVERY_CONFLICT_TABLESPACE.
Referenced by PgstatCollectorMain().
{
PgStat_StatDBEntry *dbentry;
dbentry = pgstat_get_db_entry(msg->m_databaseid, true);
switch (msg->m_reason)
{
case PROCSIG_RECOVERY_CONFLICT_DATABASE:
/*
* Since we drop the information about the database as soon as it
* replicates, there is no point in counting these conflicts.
*/
break;
case PROCSIG_RECOVERY_CONFLICT_TABLESPACE:
dbentry->n_conflict_tablespace++;
break;
case PROCSIG_RECOVERY_CONFLICT_LOCK:
dbentry->n_conflict_lock++;
break;
case PROCSIG_RECOVERY_CONFLICT_SNAPSHOT:
dbentry->n_conflict_snapshot++;
break;
case PROCSIG_RECOVERY_CONFLICT_BUFFERPIN:
dbentry->n_conflict_bufferpin++;
break;
case PROCSIG_RECOVERY_CONFLICT_STARTUP_DEADLOCK:
dbentry->n_conflict_startup_deadlock++;
break;
}
}
| static void pgstat_recv_resetcounter | ( | PgStat_MsgResetcounter * | msg, | |
| int | len | |||
| ) | [static] |
Definition at line 4651 of file pgstat.c.
References PgStat_StatDBEntry::functions, hash_destroy(), PgStat_MsgResetcounter::m_databaseid, NULL, pgstat_get_db_entry(), reset_dbentry_counters(), and PgStat_StatDBEntry::tables.
Referenced by PgstatCollectorMain().
{
PgStat_StatDBEntry *dbentry;
/*
* Lookup the database in the hashtable. Nothing to do if not there.
*/
dbentry = pgstat_get_db_entry(msg->m_databaseid, false);
if (!dbentry)
return;
/*
* We simply throw away all the database's table entries by recreating a
* new hash table for them.
*/
if (dbentry->tables != NULL)
hash_destroy(dbentry->tables);
if (dbentry->functions != NULL)
hash_destroy(dbentry->functions);
dbentry->tables = NULL;
dbentry->functions = NULL;
/*
* Reset database-level stats, too. This creates empty hash tables for
* tables and functions.
*/
reset_dbentry_counters(dbentry);
}
| static void pgstat_recv_resetsharedcounter | ( | PgStat_MsgResetsharedcounter * | msg, | |
| int | len | |||
| ) | [static] |
Definition at line 4689 of file pgstat.c.
References GetCurrentTimestamp(), PgStat_MsgResetsharedcounter::m_resettarget, RESET_BGWRITER, and PgStat_GlobalStats::stat_reset_timestamp.
Referenced by PgstatCollectorMain().
{
if (msg->m_resettarget == RESET_BGWRITER)
{
/* Reset the global background writer statistics for the cluster. */
memset(&globalStats, 0, sizeof(globalStats));
globalStats.stat_reset_timestamp = GetCurrentTimestamp();
}
/*
* Presumably the sender of this message validated the target, don't
* complain here if it's not valid
*/
}
| static void pgstat_recv_resetsinglecounter | ( | PgStat_MsgResetsinglecounter * | msg, | |
| int | len | |||
| ) | [static] |
Definition at line 4711 of file pgstat.c.
References PgStat_StatDBEntry::functions, GetCurrentTimestamp(), HASH_REMOVE, hash_search(), PgStat_MsgResetsinglecounter::m_databaseid, PgStat_MsgResetsinglecounter::m_objectid, PgStat_MsgResetsinglecounter::m_resettype, NULL, pgstat_get_db_entry(), RESET_FUNCTION, RESET_TABLE, PgStat_StatDBEntry::stat_reset_timestamp, and PgStat_StatDBEntry::tables.
Referenced by PgstatCollectorMain().
{
PgStat_StatDBEntry *dbentry;
dbentry = pgstat_get_db_entry(msg->m_databaseid, false);
if (!dbentry)
return;
/* Set the reset timestamp for the whole database */
dbentry->stat_reset_timestamp = GetCurrentTimestamp();
/* Remove object if it exists, ignore it if not */
if (msg->m_resettype == RESET_TABLE)
(void) hash_search(dbentry->tables, (void *) &(msg->m_objectid),
HASH_REMOVE, NULL);
else if (msg->m_resettype == RESET_FUNCTION)
(void) hash_search(dbentry->functions, (void *) &(msg->m_objectid),
HASH_REMOVE, NULL);
}
| static void pgstat_recv_tabpurge | ( | PgStat_MsgTabpurge * | msg, | |
| int | len | |||
| ) | [static] |
Definition at line 4575 of file pgstat.c.
References HASH_REMOVE, hash_search(), i, PgStat_MsgTabpurge::m_databaseid, PgStat_MsgTabpurge::m_nentries, PgStat_MsgTabpurge::m_tableid, NULL, pgstat_get_db_entry(), and PgStat_StatDBEntry::tables.
Referenced by PgstatCollectorMain().
{
PgStat_StatDBEntry *dbentry;
int i;
dbentry = pgstat_get_db_entry(msg->m_databaseid, false);
/*
* No need to purge if we don't even know the database.
*/
if (!dbentry || !dbentry->tables)
return;
/*
* Process all table entries in the message.
*/
for (i = 0; i < msg->m_nentries; i++)
{
/* Remove from hashtable if present; we don't care if it's not. */
(void) hash_search(dbentry->tables,
(void *) &(msg->m_tableid[i]),
HASH_REMOVE, NULL);
}
}
| static void pgstat_recv_tabstat | ( | PgStat_MsgTabstat * | msg, | |
| int | len | |||
| ) | [static] |
Definition at line 4474 of file pgstat.c.
References PgStat_StatTabEntry::analyze_count, PgStat_StatTabEntry::analyze_timestamp, PgStat_StatTabEntry::autovac_analyze_count, PgStat_StatTabEntry::autovac_analyze_timestamp, PgStat_StatTabEntry::autovac_vacuum_count, PgStat_StatTabEntry::autovac_vacuum_timestamp, PgStat_StatTabEntry::blocks_fetched, PgStat_StatTabEntry::blocks_hit, PgStat_StatTabEntry::changes_since_analyze, HASH_ENTER, hash_search(), i, PgStat_MsgTabstat::m_block_read_time, PgStat_MsgTabstat::m_block_write_time, PgStat_MsgTabstat::m_databaseid, PgStat_MsgTabstat::m_entry, PgStat_MsgTabstat::m_nentries, PgStat_MsgTabstat::m_xact_commit, PgStat_MsgTabstat::m_xact_rollback, Max, PgStat_StatDBEntry::n_block_read_time, PgStat_StatDBEntry::n_block_write_time, PgStat_StatDBEntry::n_blocks_fetched, PgStat_StatDBEntry::n_blocks_hit, PgStat_StatTabEntry::n_dead_tuples, PgStat_StatTabEntry::n_live_tuples, PgStat_StatDBEntry::n_tuples_deleted, PgStat_StatDBEntry::n_tuples_fetched, PgStat_StatDBEntry::n_tuples_inserted, PgStat_StatDBEntry::n_tuples_returned, PgStat_StatDBEntry::n_tuples_updated, PgStat_StatDBEntry::n_xact_commit, PgStat_StatDBEntry::n_xact_rollback, PgStat_StatTabEntry::numscans, pgstat_get_db_entry(), PgStat_TableCounts::t_blocks_fetched, PgStat_TableCounts::t_blocks_hit, PgStat_TableCounts::t_changed_tuples, PgStat_TableEntry::t_counts, PgStat_TableCounts::t_delta_dead_tuples, PgStat_TableCounts::t_delta_live_tuples, PgStat_TableEntry::t_id, PgStat_TableCounts::t_numscans, PgStat_TableCounts::t_tuples_deleted, PgStat_TableCounts::t_tuples_fetched, PgStat_TableCounts::t_tuples_hot_updated, PgStat_TableCounts::t_tuples_inserted, PgStat_TableCounts::t_tuples_returned, PgStat_TableCounts::t_tuples_updated, PgStat_StatDBEntry::tables, PgStat_StatTabEntry::tuples_deleted, PgStat_StatTabEntry::tuples_fetched, PgStat_StatTabEntry::tuples_hot_updated, PgStat_StatTabEntry::tuples_inserted, PgStat_StatTabEntry::tuples_returned, PgStat_StatTabEntry::tuples_updated, PgStat_StatTabEntry::vacuum_count, and PgStat_StatTabEntry::vacuum_timestamp.
Referenced by PgstatCollectorMain().
{
PgStat_StatDBEntry *dbentry;
PgStat_StatTabEntry *tabentry;
int i;
bool found;
dbentry = pgstat_get_db_entry(msg->m_databaseid, true);
/*
* Update database-wide stats.
*/
dbentry->n_xact_commit += (PgStat_Counter) (msg->m_xact_commit);
dbentry->n_xact_rollback += (PgStat_Counter) (msg->m_xact_rollback);
dbentry->n_block_read_time += msg->m_block_read_time;
dbentry->n_block_write_time += msg->m_block_write_time;
/*
* Process all table entries in the message.
*/
for (i = 0; i < msg->m_nentries; i++)
{
PgStat_TableEntry *tabmsg = &(msg->m_entry[i]);
tabentry = (PgStat_StatTabEntry *) hash_search(dbentry->tables,
(void *) &(tabmsg->t_id),
HASH_ENTER, &found);
if (!found)
{
/*
* If it's a new table entry, initialize counters to the values we
* just got.
*/
tabentry->numscans = tabmsg->t_counts.t_numscans;
tabentry->tuples_returned = tabmsg->t_counts.t_tuples_returned;
tabentry->tuples_fetched = tabmsg->t_counts.t_tuples_fetched;
tabentry->tuples_inserted = tabmsg->t_counts.t_tuples_inserted;
tabentry->tuples_updated = tabmsg->t_counts.t_tuples_updated;
tabentry->tuples_deleted = tabmsg->t_counts.t_tuples_deleted;
tabentry->tuples_hot_updated = tabmsg->t_counts.t_tuples_hot_updated;
tabentry->n_live_tuples = tabmsg->t_counts.t_delta_live_tuples;
tabentry->n_dead_tuples = tabmsg->t_counts.t_delta_dead_tuples;
tabentry->changes_since_analyze = tabmsg->t_counts.t_changed_tuples;
tabentry->blocks_fetched = tabmsg->t_counts.t_blocks_fetched;
tabentry->blocks_hit = tabmsg->t_counts.t_blocks_hit;
tabentry->vacuum_timestamp = 0;
tabentry->vacuum_count = 0;
tabentry->autovac_vacuum_timestamp = 0;
tabentry->autovac_vacuum_count = 0;
tabentry->analyze_timestamp = 0;
tabentry->analyze_count = 0;
tabentry->autovac_analyze_timestamp = 0;
tabentry->autovac_analyze_count = 0;
}
else
{
/*
* Otherwise add the values to the existing entry.
*/
tabentry->numscans += tabmsg->t_counts.t_numscans;
tabentry->tuples_returned += tabmsg->t_counts.t_tuples_returned;
tabentry->tuples_fetched += tabmsg->t_counts.t_tuples_fetched;
tabentry->tuples_inserted += tabmsg->t_counts.t_tuples_inserted;
tabentry->tuples_updated += tabmsg->t_counts.t_tuples_updated;
tabentry->tuples_deleted += tabmsg->t_counts.t_tuples_deleted;
tabentry->tuples_hot_updated += tabmsg->t_counts.t_tuples_hot_updated;
tabentry->n_live_tuples += tabmsg->t_counts.t_delta_live_tuples;
tabentry->n_dead_tuples += tabmsg->t_counts.t_delta_dead_tuples;
tabentry->changes_since_analyze += tabmsg->t_counts.t_changed_tuples;
tabentry->blocks_fetched += tabmsg->t_counts.t_blocks_fetched;
tabentry->blocks_hit += tabmsg->t_counts.t_blocks_hit;
}
/* Clamp n_live_tuples in case of negative delta_live_tuples */
tabentry->n_live_tuples = Max(tabentry->n_live_tuples, 0);
/* Likewise for n_dead_tuples */
tabentry->n_dead_tuples = Max(tabentry->n_dead_tuples, 0);
/*
* Add per-table stats to the per-database entry, too.
*/
dbentry->n_tuples_returned += tabmsg->t_counts.t_tuples_returned;
dbentry->n_tuples_fetched += tabmsg->t_counts.t_tuples_fetched;
dbentry->n_tuples_inserted += tabmsg->t_counts.t_tuples_inserted;
dbentry->n_tuples_updated += tabmsg->t_counts.t_tuples_updated;
dbentry->n_tuples_deleted += tabmsg->t_counts.t_tuples_deleted;
dbentry->n_blocks_fetched += tabmsg->t_counts.t_blocks_fetched;
dbentry->n_blocks_hit += tabmsg->t_counts.t_blocks_hit;
}
}
| static void pgstat_recv_tempfile | ( | PgStat_MsgTempFile * | msg, | |
| int | len | |||
| ) | [static] |
Definition at line 4911 of file pgstat.c.
References PgStat_MsgTempFile::m_databaseid, PgStat_MsgTempFile::m_filesize, PgStat_StatDBEntry::n_temp_bytes, PgStat_StatDBEntry::n_temp_files, and pgstat_get_db_entry().
Referenced by PgstatCollectorMain().
{
PgStat_StatDBEntry *dbentry;
dbentry = pgstat_get_db_entry(msg->m_databaseid, true);
dbentry->n_temp_bytes += msg->m_filesize;
dbentry->n_temp_files += 1;
}
| static void pgstat_recv_vacuum | ( | PgStat_MsgVacuum * | msg, | |
| int | len | |||
| ) | [static] |
Definition at line 4758 of file pgstat.c.
References PgStat_StatTabEntry::autovac_vacuum_count, PgStat_StatTabEntry::autovac_vacuum_timestamp, PgStat_MsgVacuum::m_autovacuum, PgStat_MsgVacuum::m_databaseid, PgStat_MsgVacuum::m_tableoid, PgStat_MsgVacuum::m_tuples, PgStat_MsgVacuum::m_vacuumtime, PgStat_StatTabEntry::n_dead_tuples, PgStat_StatTabEntry::n_live_tuples, pgstat_get_db_entry(), pgstat_get_tab_entry(), PgStat_StatTabEntry::vacuum_count, and PgStat_StatTabEntry::vacuum_timestamp.
Referenced by PgstatCollectorMain().
{
PgStat_StatDBEntry *dbentry;
PgStat_StatTabEntry *tabentry;
/*
* Store the data in the table's hashtable entry.
*/
dbentry = pgstat_get_db_entry(msg->m_databaseid, true);
tabentry = pgstat_get_tab_entry(dbentry, msg->m_tableoid, true);
tabentry->n_live_tuples = msg->m_tuples;
/* Resetting dead_tuples to 0 is an approximation ... */
tabentry->n_dead_tuples = 0;
if (msg->m_autovacuum)
{
tabentry->autovac_vacuum_timestamp = msg->m_vacuumtime;
tabentry->autovac_vacuum_count++;
}
else
{
tabentry->vacuum_timestamp = msg->m_vacuumtime;
tabentry->vacuum_count++;
}
}
| void pgstat_report_activity | ( | BackendState | state, | |
| const char * | cmd_str | |||
| ) |
Definition at line 2571 of file pgstat.c.
References Assert, GetCurrentStatementStartTimestamp(), GetCurrentTimestamp(), NULL, pg_mbcliplen(), pgstat_track_activities, pgstat_track_activity_query_size, PgBackendStatus::st_activity, PgBackendStatus::st_activity_start_timestamp, PgBackendStatus::st_changecount, PgBackendStatus::st_state, PgBackendStatus::st_state_start_timestamp, PgBackendStatus::st_waiting, PgBackendStatus::st_xact_start_timestamp, and STATE_DISABLED.
Referenced by autovac_report_activity(), exec_bind_message(), exec_execute_message(), exec_parse_message(), exec_simple_query(), initialize_worker_spi(), PostgresMain(), and worker_spi_main().
{
volatile PgBackendStatus *beentry = MyBEEntry;
TimestampTz start_timestamp;
TimestampTz current_timestamp;
int len = 0;
TRACE_POSTGRESQL_STATEMENT_STATUS(cmd_str);
if (!beentry)
return;
if (!pgstat_track_activities)
{
if (beentry->st_state != STATE_DISABLED)
{
/*
* track_activities is disabled, but we last reported a
* non-disabled state. As our final update, change the state and
* clear fields we will not be updating anymore.
*/
beentry->st_changecount++;
beentry->st_state = STATE_DISABLED;
beentry->st_state_start_timestamp = 0;
beentry->st_activity[0] = '\0';
beentry->st_activity_start_timestamp = 0;
/* st_xact_start_timestamp and st_waiting are also disabled */
beentry->st_xact_start_timestamp = 0;
beentry->st_waiting = false;
beentry->st_changecount++;
Assert((beentry->st_changecount & 1) == 0);
}
return;
}
/*
* To minimize the time spent modifying the entry, fetch all the needed
* data first.
*/
start_timestamp = GetCurrentStatementStartTimestamp();
if (cmd_str != NULL)
{
len = pg_mbcliplen(cmd_str, strlen(cmd_str),
pgstat_track_activity_query_size - 1);
}
current_timestamp = GetCurrentTimestamp();
/*
* Now update the status entry
*/
beentry->st_changecount++;
beentry->st_state = state;
beentry->st_state_start_timestamp = current_timestamp;
if (cmd_str != NULL)
{
memcpy((char *) beentry->st_activity, cmd_str, len);
beentry->st_activity[len] = '\0';
beentry->st_activity_start_timestamp = start_timestamp;
}
beentry->st_changecount++;
Assert((beentry->st_changecount & 1) == 0);
}
| void pgstat_report_analyze | ( | Relation | rel, | |
| PgStat_Counter | livetuples, | |||
| PgStat_Counter | deadtuples | |||
| ) |
Definition at line 1319 of file pgstat.c.
References GetCurrentTimestamp(), InvalidOid, IsAutoVacuumWorkerProcess(), PgStat_MsgAnalyze::m_analyzetime, PgStat_MsgAnalyze::m_autovacuum, PgStat_MsgAnalyze::m_databaseid, PgStat_MsgAnalyze::m_dead_tuples, PgStat_MsgAnalyze::m_hdr, PgStat_MsgAnalyze::m_live_tuples, PgStat_MsgAnalyze::m_tableoid, Max, MyDatabaseId, NULL, PGINVALID_SOCKET, RelationData::pgstat_info, PGSTAT_MTYPE_ANALYZE, pgstat_send(), pgstat_setheader(), pgstat_track_counts, pgStatSock, RelationData::rd_rel, RelationGetRelid, PgStat_TableStatus::t_counts, PgStat_TableCounts::t_delta_dead_tuples, PgStat_TableStatus::trans, trans, PgStat_TableXactStatus::tuples_deleted, PgStat_TableXactStatus::tuples_inserted, PgStat_TableXactStatus::tuples_updated, and PgStat_TableXactStatus::upper.
Referenced by do_analyze_rel().
{
PgStat_MsgAnalyze msg;
if (pgStatSock == PGINVALID_SOCKET || !pgstat_track_counts)
return;
/*
* Unlike VACUUM, ANALYZE might be running inside a transaction that has
* already inserted and/or deleted rows in the target table. ANALYZE will
* have counted such rows as live or dead respectively. Because we will
* report our counts of such rows at transaction end, we should subtract
* off these counts from what we send to the collector now, else they'll
* be double-counted after commit. (This approach also ensures that the
* collector ends up with the right numbers if we abort instead of
* committing.)
*/
if (rel->pgstat_info != NULL)
{
PgStat_TableXactStatus *trans;
for (trans = rel->pgstat_info->trans; trans; trans = trans->upper)
{
livetuples -= trans->tuples_inserted - trans->tuples_deleted;
deadtuples -= trans->tuples_updated + trans->tuples_deleted;
}
/* count stuff inserted by already-aborted subxacts, too */
deadtuples -= rel->pgstat_info->t_counts.t_delta_dead_tuples;
/* Since ANALYZE's counts are estimates, we could have underflowed */
livetuples = Max(livetuples, 0);
deadtuples = Max(deadtuples, 0);
}
pgstat_setheader(&msg.m_hdr, PGSTAT_MTYPE_ANALYZE);
msg.m_databaseid = rel->rd_rel->relisshared ? InvalidOid : MyDatabaseId;
msg.m_tableoid = RelationGetRelid(rel);
msg.m_autovacuum = IsAutoVacuumWorkerProcess();
msg.m_analyzetime = GetCurrentTimestamp();
msg.m_live_tuples = livetuples;
msg.m_dead_tuples = deadtuples;
pgstat_send(&msg, sizeof(msg));
}
| void pgstat_report_appname | ( | const char * | appname | ) |
Definition at line 2644 of file pgstat.c.
References Assert, NAMEDATALEN, pg_mbcliplen(), PgBackendStatus::st_appname, and PgBackendStatus::st_changecount.
Referenced by assign_application_name(), and pgstat_bestart().
{
volatile PgBackendStatus *beentry = MyBEEntry;
int len;
if (!beentry)
return;
/* This should be unnecessary if GUC did its job, but be safe */
len = pg_mbcliplen(appname, strlen(appname), NAMEDATALEN - 1);
/*
* Update my status entry, following the protocol of bumping
* st_changecount before and after. We use a volatile pointer here to
* ensure the compiler doesn't try to get cute.
*/
beentry->st_changecount++;
memcpy((char *) beentry->st_appname, appname, len);
beentry->st_appname[len] = '\0';
beentry->st_changecount++;
Assert((beentry->st_changecount & 1) == 0);
}
| void pgstat_report_autovac | ( | Oid | dboid | ) |
Definition at line 1274 of file pgstat.c.
References GetCurrentTimestamp(), PgStat_MsgAutovacStart::m_databaseid, PgStat_MsgAutovacStart::m_hdr, PgStat_MsgAutovacStart::m_start_time, PGINVALID_SOCKET, PGSTAT_MTYPE_AUTOVAC_START, pgstat_send(), pgstat_setheader(), and pgStatSock.
Referenced by AutoVacWorkerMain().
{
PgStat_MsgAutovacStart msg;
if (pgStatSock == PGINVALID_SOCKET)
return;
pgstat_setheader(&msg.m_hdr, PGSTAT_MTYPE_AUTOVAC_START);
msg.m_databaseid = dboid;
msg.m_start_time = GetCurrentTimestamp();
pgstat_send(&msg, sizeof(msg));
}
| void pgstat_report_deadlock | ( | void | ) |
Definition at line 1390 of file pgstat.c.
References PgStat_MsgDeadlock::m_databaseid, PgStat_MsgDeadlock::m_hdr, MyDatabaseId, PGINVALID_SOCKET, PGSTAT_MTYPE_DEADLOCK, pgstat_send(), pgstat_setheader(), pgstat_track_counts, and pgStatSock.
Referenced by DeadLockReport().
{
PgStat_MsgDeadlock msg;
if (pgStatSock == PGINVALID_SOCKET || !pgstat_track_counts)
return;
pgstat_setheader(&msg.m_hdr, PGSTAT_MTYPE_DEADLOCK);
msg.m_databaseid = MyDatabaseId;
pgstat_send(&msg, sizeof(msg));
}
| void pgstat_report_recovery_conflict | ( | int | reason | ) |
Definition at line 1370 of file pgstat.c.
References PgStat_MsgRecoveryConflict::m_databaseid, PgStat_MsgRecoveryConflict::m_hdr, PgStat_MsgRecoveryConflict::m_reason, MyDatabaseId, PGINVALID_SOCKET, PGSTAT_MTYPE_RECOVERYCONFLICT, pgstat_send(), pgstat_setheader(), pgstat_track_counts, and pgStatSock.
Referenced by ProcessInterrupts().
{
PgStat_MsgRecoveryConflict msg;
if (pgStatSock == PGINVALID_SOCKET || !pgstat_track_counts)
return;
pgstat_setheader(&msg.m_hdr, PGSTAT_MTYPE_RECOVERYCONFLICT);
msg.m_databaseid = MyDatabaseId;
msg.m_reason = reason;
pgstat_send(&msg, sizeof(msg));
}
| void pgstat_report_stat | ( | bool | force | ) |
Definition at line 713 of file pgstat.c.
References Assert, GetCurrentTransactionStopTimestamp(), have_function_stats, i, PgStat_MsgTabstat::m_databaseid, PgStat_MsgTabstat::m_entry, PgStat_MsgTabstat::m_nentries, memcmp(), MemSet, MyDatabaseId, NULL, PGSTAT_NUM_TABENTRIES, pgstat_send_funcstats(), pgstat_send_tabstat(), PGSTAT_STAT_INTERVAL, pgStatXactCommit, pgStatXactRollback, PgStat_TableEntry::t_counts, PgStat_TableStatus::t_counts, PgStat_TableStatus::t_id, PgStat_TableEntry::t_id, PgStat_TableStatus::t_shared, TimestampDifferenceExceeds(), PgStat_TableStatus::trans, TabStatusArray::tsa_entries, TabStatusArray::tsa_next, and TabStatusArray::tsa_used.
Referenced by pgstat_beshutdown_hook(), and PostgresMain().
{
/* we assume this inits to all zeroes: */
static const PgStat_TableCounts all_zeroes;
static TimestampTz last_report = 0;
TimestampTz now;
PgStat_MsgTabstat regular_msg;
PgStat_MsgTabstat shared_msg;
TabStatusArray *tsa;
int i;
/* Don't expend a clock check if nothing to do */
if ((pgStatTabList == NULL || pgStatTabList->tsa_used == 0) &&
!have_function_stats && !force)
return;
/*
* Don't send a message unless it's been at least PGSTAT_STAT_INTERVAL
* msec since we last sent one, or the caller wants to force stats out.
*/
now = GetCurrentTransactionStopTimestamp();
if (!force &&
!TimestampDifferenceExceeds(last_report, now, PGSTAT_STAT_INTERVAL))
return;
last_report = now;
/*
* Scan through the TabStatusArray struct(s) to find tables that actually
* have counts, and build messages to send. We have to separate shared
* relations from regular ones because the databaseid field in the message
* header has to depend on that.
*/
regular_msg.m_databaseid = MyDatabaseId;
shared_msg.m_databaseid = InvalidOid;
regular_msg.m_nentries = 0;
shared_msg.m_nentries = 0;
for (tsa = pgStatTabList; tsa != NULL; tsa = tsa->tsa_next)
{
for (i = 0; i < tsa->tsa_used; i++)
{
PgStat_TableStatus *entry = &tsa->tsa_entries[i];
PgStat_MsgTabstat *this_msg;
PgStat_TableEntry *this_ent;
/* Shouldn't have any pending transaction-dependent counts */
Assert(entry->trans == NULL);
/*
* Ignore entries that didn't accumulate any actual counts, such
* as indexes that were opened by the planner but not used.
*/
if (memcmp(&entry->t_counts, &all_zeroes,
sizeof(PgStat_TableCounts)) == 0)
continue;
/*
* OK, insert data into the appropriate message, and send if full.
*/
this_msg = entry->t_shared ? &shared_msg : ®ular_msg;
this_ent = &this_msg->m_entry[this_msg->m_nentries];
this_ent->t_id = entry->t_id;
memcpy(&this_ent->t_counts, &entry->t_counts,
sizeof(PgStat_TableCounts));
if (++this_msg->m_nentries >= PGSTAT_NUM_TABENTRIES)
{
pgstat_send_tabstat(this_msg);
this_msg->m_nentries = 0;
}
}
/* zero out TableStatus structs after use */
MemSet(tsa->tsa_entries, 0,
tsa->tsa_used * sizeof(PgStat_TableStatus));
tsa->tsa_used = 0;
}
/*
* Send partial messages. If force is true, make sure that any pending
* xact commit/abort gets counted, even if no table stats to send.
*/
if (regular_msg.m_nentries > 0 ||
(force && (pgStatXactCommit > 0 || pgStatXactRollback > 0)))
pgstat_send_tabstat(®ular_msg);
if (shared_msg.m_nentries > 0)
pgstat_send_tabstat(&shared_msg);
/* Now, send function statistics */
pgstat_send_funcstats();
}
| void pgstat_report_tempfile | ( | size_t | filesize | ) |
Definition at line 1409 of file pgstat.c.
References PgStat_MsgTempFile::m_databaseid, PgStat_MsgTempFile::m_filesize, PgStat_MsgTempFile::m_hdr, MyDatabaseId, PGINVALID_SOCKET, PGSTAT_MTYPE_TEMPFILE, pgstat_send(), pgstat_setheader(), pgstat_track_counts, and pgStatSock.
Referenced by FileClose().
{
PgStat_MsgTempFile msg;
if (pgStatSock == PGINVALID_SOCKET || !pgstat_track_counts)
return;
pgstat_setheader(&msg.m_hdr, PGSTAT_MTYPE_TEMPFILE);
msg.m_databaseid = MyDatabaseId;
msg.m_filesize = filesize;
pgstat_send(&msg, sizeof(msg));
}
| void pgstat_report_vacuum | ( | Oid | tableoid, | |
| bool | shared, | |||
| PgStat_Counter | tuples | |||
| ) |
Definition at line 1296 of file pgstat.c.
References GetCurrentTimestamp(), InvalidOid, IsAutoVacuumWorkerProcess(), PgStat_MsgVacuum::m_autovacuum, PgStat_MsgVacuum::m_databaseid, PgStat_MsgVacuum::m_hdr, PgStat_MsgVacuum::m_tableoid, PgStat_MsgVacuum::m_tuples, PgStat_MsgVacuum::m_vacuumtime, MyDatabaseId, PGINVALID_SOCKET, PGSTAT_MTYPE_VACUUM, pgstat_send(), pgstat_setheader(), pgstat_track_counts, and pgStatSock.
Referenced by lazy_vacuum_rel().
{
PgStat_MsgVacuum msg;
if (pgStatSock == PGINVALID_SOCKET || !pgstat_track_counts)
return;
pgstat_setheader(&msg.m_hdr, PGSTAT_MTYPE_VACUUM);
msg.m_databaseid = shared ? InvalidOid : MyDatabaseId;
msg.m_tableoid = tableoid;
msg.m_autovacuum = IsAutoVacuumWorkerProcess();
msg.m_vacuumtime = GetCurrentTimestamp();
msg.m_tuples = tuples;
pgstat_send(&msg, sizeof(msg));
}
| void pgstat_report_waiting | ( | bool | waiting | ) |
Definition at line 2702 of file pgstat.c.
References pgstat_track_activities, and PgBackendStatus::st_waiting.
Referenced by WaitOnLock().
{
volatile PgBackendStatus *beentry = MyBEEntry;
if (!pgstat_track_activities || !beentry)
return;
/*
* Since this is a single-byte field in a struct that only this process
* may modify, there seems no need to bother with the st_changecount
* protocol. The update must appear atomic in any case.
*/
beentry->st_waiting = waiting;
}
| void pgstat_report_xact_timestamp | ( | TimestampTz | tstamp | ) |
Definition at line 2674 of file pgstat.c.
References Assert, pgstat_track_activities, PgBackendStatus::st_changecount, and PgBackendStatus::st_xact_start_timestamp.
Referenced by AbortTransaction(), CommitTransaction(), and StartTransaction().
{
volatile PgBackendStatus *beentry = MyBEEntry;
if (!pgstat_track_activities || !beentry)
return;
/*
* Update my status entry, following the protocol of bumping
* st_changecount before and after. We use a volatile pointer here to
* ensure the compiler doesn't try to get cute.
*/
beentry->st_changecount++;
beentry->st_xact_start_timestamp = tstamp;
beentry->st_changecount++;
Assert((beentry->st_changecount & 1) == 0);
}
| void pgstat_reset_all | ( | void | ) |
Definition at line 587 of file pgstat.c.
References pgstat_reset_remove_files(), pgstat_stat_directory, and PGSTAT_STAT_PERMANENT_DIRECTORY.
Referenced by StartupXLOG().
| void pgstat_reset_counters | ( | void | ) |
Definition at line 1190 of file pgstat.c.
References ereport, errcode(), errmsg(), ERROR, PgStat_MsgResetcounter::m_databaseid, PgStat_MsgResetcounter::m_hdr, MyDatabaseId, PGINVALID_SOCKET, PGSTAT_MTYPE_RESETCOUNTER, pgstat_send(), pgstat_setheader(), pgStatSock, and superuser().
Referenced by pg_stat_reset().
{
PgStat_MsgResetcounter msg;
if (pgStatSock == PGINVALID_SOCKET)
return;
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("must be superuser to reset statistics counters")));
pgstat_setheader(&msg.m_hdr, PGSTAT_MTYPE_RESETCOUNTER);
msg.m_databaseid = MyDatabaseId;
pgstat_send(&msg, sizeof(msg));
}
| static void pgstat_reset_remove_files | ( | const char * | directory | ) | [static] |
Definition at line 559 of file pgstat.c.
References AllocateDir(), dirent::d_name, FreeDir(), MAXPGPATH, NULL, pgstat_stat_directory, ReadDir(), snprintf(), and unlink().
Referenced by pgstat_reset_all().
{
DIR *dir;
struct dirent *entry;
char fname[MAXPGPATH];
dir = AllocateDir(pgstat_stat_directory);
while ((entry = ReadDir(dir, pgstat_stat_directory)) != NULL)
{
if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
continue;
/* XXX should we try to ignore files other than the ones we write? */
snprintf(fname, MAXPGPATH, "%s/%s", pgstat_stat_directory,
entry->d_name);
unlink(fname);
}
FreeDir(dir);
}
| void pgstat_reset_shared_counters | ( | const char * | target | ) |
Definition at line 1214 of file pgstat.c.
References ereport, errcode(), errhint(), errmsg(), ERROR, PgStat_MsgResetsharedcounter::m_hdr, PgStat_MsgResetsharedcounter::m_resettarget, PGINVALID_SOCKET, PGSTAT_MTYPE_RESETSHAREDCOUNTER, pgstat_send(), pgstat_setheader(), pgStatSock, and superuser().
Referenced by pg_stat_reset_shared().
{
PgStat_MsgResetsharedcounter msg;
if (pgStatSock == PGINVALID_SOCKET)
return;
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("must be superuser to reset statistics counters")));
if (strcmp(target, "bgwriter") == 0)
msg.m_resettarget = RESET_BGWRITER;
else
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("unrecognized reset target: \"%s\"", target),
errhint("Target must be \"bgwriter\".")));
pgstat_setheader(&msg.m_hdr, PGSTAT_MTYPE_RESETSHAREDCOUNTER);
pgstat_send(&msg, sizeof(msg));
}
| void pgstat_reset_single_counter | ( | Oid | objoid, | |
| PgStat_Single_Reset_Type | type | |||
| ) |
Definition at line 1245 of file pgstat.c.
References ereport, errcode(), errmsg(), ERROR, PgStat_MsgResetsinglecounter::m_databaseid, PgStat_MsgResetsinglecounter::m_hdr, PgStat_MsgResetsinglecounter::m_objectid, PgStat_MsgResetsinglecounter::m_resettype, MyDatabaseId, PGINVALID_SOCKET, PGSTAT_MTYPE_RESETSINGLECOUNTER, pgstat_send(), pgstat_setheader(), pgStatSock, and superuser().
Referenced by pg_stat_reset_single_function_counters(), and pg_stat_reset_single_table_counters().
{
PgStat_MsgResetsinglecounter msg;
if (pgStatSock == PGINVALID_SOCKET)
return;
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("must be superuser to reset statistics counters")));
pgstat_setheader(&msg.m_hdr, PGSTAT_MTYPE_RESETSINGLECOUNTER);
msg.m_databaseid = MyDatabaseId;
msg.m_resettype = type;
msg.m_objectid = objoid;
pgstat_send(&msg, sizeof(msg));
}
| static void pgstat_send | ( | void * | msg, | |
| int | len | |||
| ) | [static] |
Definition at line 2980 of file pgstat.c.
References EINTR, elog, LOG, PGINVALID_SOCKET, pgStatSock, and send.
Referenced by pgstat_drop_database(), pgstat_ping(), pgstat_report_analyze(), pgstat_report_autovac(), pgstat_report_deadlock(), pgstat_report_recovery_conflict(), pgstat_report_tempfile(), pgstat_report_vacuum(), pgstat_reset_counters(), pgstat_reset_shared_counters(), pgstat_reset_single_counter(), pgstat_send_bgwriter(), pgstat_send_funcstats(), pgstat_send_inquiry(), pgstat_send_tabstat(), and pgstat_vacuum_stat().
{
int rc;
if (pgStatSock == PGINVALID_SOCKET)
return;
((PgStat_MsgHdr *) msg)->m_size = len;
/* We'll retry after EINTR, but ignore all other failures */
do
{
rc = send(pgStatSock, msg, len, 0);
} while (rc < 0 && errno == EINTR);
#ifdef USE_ASSERT_CHECKING
/* In debug builds, log send failures ... */
if (rc < 0)
elog(LOG, "could not send to statistics collector: %m");
#endif
}
| void pgstat_send_bgwriter | ( | void | ) |
Definition at line 3009 of file pgstat.c.
References PgStat_MsgBgWriter::m_hdr, memcmp(), MemSet, PGSTAT_MTYPE_BGWRITER, pgstat_send(), and pgstat_setheader().
Referenced by BackgroundWriterMain(), CheckpointerMain(), and CheckpointWriteDelay().
{
/* We assume this initializes to zeroes */
static const PgStat_MsgBgWriter all_zeroes;
/*
* This function can be called even if nothing at all has happened. In
* this case, avoid sending a completely empty message to the stats
* collector.
*/
if (memcmp(&BgWriterStats, &all_zeroes, sizeof(PgStat_MsgBgWriter)) == 0)
return;
/*
* Prepare and send the message
*/
pgstat_setheader(&BgWriterStats.m_hdr, PGSTAT_MTYPE_BGWRITER);
pgstat_send(&BgWriterStats, sizeof(BgWriterStats));
/*
* Clear out the statistics buffer, so it can be re-used.
*/
MemSet(&BgWriterStats, 0, sizeof(BgWriterStats));
}
| static void pgstat_send_funcstats | ( | void | ) | [static] |
Definition at line 852 of file pgstat.c.
References PgStat_BackendFunctionEntry::f_counts, PgStat_BackendFunctionEntry::f_id, PgStat_FunctionEntry::f_id, PgStat_FunctionCounts::f_numcalls, PgStat_FunctionEntry::f_numcalls, PgStat_FunctionCounts::f_self_time, PgStat_FunctionEntry::f_self_time, PgStat_FunctionCounts::f_total_time, PgStat_FunctionEntry::f_total_time, hash_seq_init(), hash_seq_search(), have_function_stats, INSTR_TIME_GET_MICROSEC, PgStat_MsgFuncstat::m_databaseid, PgStat_MsgFuncstat::m_entry, PgStat_MsgFuncstat::m_hdr, PgStat_MsgFuncstat::m_nentries, memcmp(), MemSet, MyDatabaseId, NULL, offsetof, PGSTAT_MTYPE_FUNCSTAT, PGSTAT_NUM_FUNCENTRIES, pgstat_send(), and pgstat_setheader().
Referenced by pgstat_report_stat().
{
/* we assume this inits to all zeroes: */
static const PgStat_FunctionCounts all_zeroes;
PgStat_MsgFuncstat msg;
PgStat_BackendFunctionEntry *entry;
HASH_SEQ_STATUS fstat;
if (pgStatFunctions == NULL)
return;
pgstat_setheader(&msg.m_hdr, PGSTAT_MTYPE_FUNCSTAT);
msg.m_databaseid = MyDatabaseId;
msg.m_nentries = 0;
hash_seq_init(&fstat, pgStatFunctions);
while ((entry = (PgStat_BackendFunctionEntry *) hash_seq_search(&fstat)) != NULL)
{
PgStat_FunctionEntry *m_ent;
/* Skip it if no counts accumulated since last time */
if (memcmp(&entry->f_counts, &all_zeroes,
sizeof(PgStat_FunctionCounts)) == 0)
continue;
/* need to convert format of time accumulators */
m_ent = &msg.m_entry[msg.m_nentries];
m_ent->f_id = entry->f_id;
m_ent->f_numcalls = entry->f_counts.f_numcalls;
m_ent->f_total_time = INSTR_TIME_GET_MICROSEC(entry->f_counts.f_total_time);
m_ent->f_self_time = INSTR_TIME_GET_MICROSEC(entry->f_counts.f_self_time);
if (++msg.m_nentries >= PGSTAT_NUM_FUNCENTRIES)
{
pgstat_send(&msg, offsetof(PgStat_MsgFuncstat, m_entry[0]) +
msg.m_nentries * sizeof(PgStat_FunctionEntry));
msg.m_nentries = 0;
}
/* reset the entry's counts */
MemSet(&entry->f_counts, 0, sizeof(PgStat_FunctionCounts));
}
if (msg.m_nentries > 0)
pgstat_send(&msg, offsetof(PgStat_MsgFuncstat, m_entry[0]) +
msg.m_nentries * sizeof(PgStat_FunctionEntry));
have_function_stats = false;
}
| static void pgstat_send_inquiry | ( | TimestampTz | clock_time, | |
| TimestampTz | cutoff_time, | |||
| Oid | databaseid | |||
| ) | [static] |
Definition at line 1448 of file pgstat.c.
References PgStat_MsgInquiry::clock_time, PgStat_MsgInquiry::cutoff_time, PgStat_MsgInquiry::databaseid, PgStat_MsgInquiry::m_hdr, PGSTAT_MTYPE_INQUIRY, pgstat_send(), and pgstat_setheader().
Referenced by backend_read_statsfile().
{
PgStat_MsgInquiry msg;
pgstat_setheader(&msg.m_hdr, PGSTAT_MTYPE_INQUIRY);
msg.clock_time = clock_time;
msg.cutoff_time = cutoff_time;
msg.databaseid = databaseid;
pgstat_send(&msg, sizeof(msg));
}
| static void pgstat_send_tabstat | ( | PgStat_MsgTabstat * | tsmsg | ) | [static] |
Definition at line 808 of file pgstat.c.
References PgStat_MsgTabstat::m_block_read_time, PgStat_MsgTabstat::m_block_write_time, PgStat_MsgTabstat::m_databaseid, PgStat_MsgTabstat::m_hdr, PgStat_MsgTabstat::m_nentries, PgStat_MsgTabstat::m_xact_commit, PgStat_MsgTabstat::m_xact_rollback, offsetof, OidIsValid, PGINVALID_SOCKET, PGSTAT_MTYPE_TABSTAT, pgstat_send(), pgstat_setheader(), pgStatBlockReadTime, pgStatBlockWriteTime, pgStatSock, pgStatXactCommit, and pgStatXactRollback.
Referenced by pgstat_report_stat().
{
int n;
int len;
/* It's unlikely we'd get here with no socket, but maybe not impossible */
if (pgStatSock == PGINVALID_SOCKET)
return;
/*
* Report and reset accumulated xact commit/rollback and I/O timings
* whenever we send a normal tabstat message
*/
if (OidIsValid(tsmsg->m_databaseid))
{
tsmsg->m_xact_commit = pgStatXactCommit;
tsmsg->m_xact_rollback = pgStatXactRollback;
tsmsg->m_block_read_time = pgStatBlockReadTime;
tsmsg->m_block_write_time = pgStatBlockWriteTime;
pgStatXactCommit = 0;
pgStatXactRollback = 0;
pgStatBlockReadTime = 0;
pgStatBlockWriteTime = 0;
}
else
{
tsmsg->m_xact_commit = 0;
tsmsg->m_xact_rollback = 0;
tsmsg->m_block_read_time = 0;
tsmsg->m_block_write_time = 0;
}
n = tsmsg->m_nentries;
len = offsetof(PgStat_MsgTabstat, m_entry[0]) +
n * sizeof(PgStat_TableEntry);
pgstat_setheader(&tsmsg->m_hdr, PGSTAT_MTYPE_TABSTAT);
pgstat_send(tsmsg, len);
}
| static void pgstat_setheader | ( | PgStat_MsgHdr * | hdr, | |
| StatMsgType | mtype | |||
| ) | [static] |
Definition at line 2967 of file pgstat.c.
References PgStat_MsgHdr::m_type.
Referenced by pgstat_drop_database(), pgstat_ping(), pgstat_report_analyze(), pgstat_report_autovac(), pgstat_report_deadlock(), pgstat_report_recovery_conflict(), pgstat_report_tempfile(), pgstat_report_vacuum(), pgstat_reset_counters(), pgstat_reset_shared_counters(), pgstat_reset_single_counter(), pgstat_send_bgwriter(), pgstat_send_funcstats(), pgstat_send_inquiry(), pgstat_send_tabstat(), and pgstat_vacuum_stat().
{
hdr->m_type = mtype;
}
| static void pgstat_setup_memcxt | ( | void | ) | [static] |
Definition at line 4348 of file pgstat.c.
References ALLOCSET_SMALL_INITSIZE, ALLOCSET_SMALL_MAXSIZE, ALLOCSET_SMALL_MINSIZE, AllocSetContextCreate(), and TopMemoryContext.
Referenced by pgstat_read_current_status(), and pgstat_read_statsfiles().
{
if (!pgStatLocalContext)
pgStatLocalContext = AllocSetContextCreate(TopMemoryContext,
"Statistics snapshot",
ALLOCSET_SMALL_MINSIZE,
ALLOCSET_SMALL_INITSIZE,
ALLOCSET_SMALL_MAXSIZE);
}
| static void pgstat_sighup_handler | ( | SIGNAL_ARGS | ) | [static] |
Definition at line 3329 of file pgstat.c.
References got_SIGHUP, and SetLatch().
Referenced by PgstatCollectorMain().
{
int save_errno = errno;
got_SIGHUP = true;
SetLatch(&pgStatLatch);
errno = save_errno;
}
| int pgstat_start | ( | void | ) |
Definition at line 629 of file pgstat.c.
References ClosePostmasterPorts(), ereport, errmsg(), fork_process(), last_pgstat_start_time, LOG, NULL, on_exit_reset(), PGINVALID_SOCKET, PGSharedMemoryDetach(), PGSTAT_RESTART_INTERVAL, PgstatCollectorMain(), and pgStatSock.
Referenced by reaper(), ServerLoop(), and sigusr1_handler().
{
time_t curtime;
pid_t pgStatPid;
/*
* Check that the socket is there, else pgstat_init failed and we can do
* nothing useful.
*/
if (pgStatSock == PGINVALID_SOCKET)
return 0;
/*
* Do nothing if too soon since last collector start. This is a safety
* valve to protect against continuous respawn attempts if the collector
* is dying immediately at launch. Note that since we will be re-called
* from the postmaster main loop, we will get another chance later.
*/
curtime = time(NULL);
if ((unsigned int) (curtime - last_pgstat_start_time) <
(unsigned int) PGSTAT_RESTART_INTERVAL)
return 0;
last_pgstat_start_time = curtime;
/*
* Okay, fork off the collector.
*/
#ifdef EXEC_BACKEND
switch ((pgStatPid = pgstat_forkexec()))
#else
switch ((pgStatPid = fork_process()))
#endif
{
case -1:
ereport(LOG,
(errmsg("could not fork statistics collector: %m")));
return 0;
#ifndef EXEC_BACKEND
case 0:
/* in postmaster child ... */
/* Close the postmaster's sockets */
ClosePostmasterPorts(false);
/* Lose the postmaster's on-exit routines */
on_exit_reset();
/* Drop our connection to postmaster's shared memory, as well */
PGSharedMemoryDetach();
PgstatCollectorMain(0, NULL);
break;
#endif
default:
return (int) pgStatPid;
}
/* shouldn't get here */
return 0;
}
| void pgstat_twophase_postabort | ( | TransactionId | xid, | |
| uint16 | info, | |||
| void * | recdata, | |||
| uint32 | len | |||
| ) |
Definition at line 2119 of file pgstat.c.
References get_tabstat_entry(), PgStat_TableStatus::t_counts, PgStat_TableCounts::t_delta_dead_tuples, TwoPhasePgStatRecord::t_id, TwoPhasePgStatRecord::t_shared, PgStat_TableCounts::t_tuples_deleted, PgStat_TableCounts::t_tuples_inserted, PgStat_TableCounts::t_tuples_updated, TwoPhasePgStatRecord::tuples_deleted, TwoPhasePgStatRecord::tuples_inserted, and TwoPhasePgStatRecord::tuples_updated.
{
TwoPhasePgStatRecord *rec = (TwoPhasePgStatRecord *) recdata;
PgStat_TableStatus *pgstat_info;
/* Find or create a tabstat entry for the rel */
pgstat_info = get_tabstat_entry(rec->t_id, rec->t_shared);
/* Same math as in AtEOXact_PgStat, abort case */
pgstat_info->t_counts.t_tuples_inserted += rec->tuples_inserted;
pgstat_info->t_counts.t_tuples_updated += rec->tuples_updated;
pgstat_info->t_counts.t_tuples_deleted += rec->tuples_deleted;
pgstat_info->t_counts.t_delta_dead_tuples +=
rec->tuples_inserted + rec->tuples_updated;
}
| void pgstat_twophase_postcommit | ( | TransactionId | xid, | |
| uint16 | info, | |||
| void * | recdata, | |||
| uint32 | len | |||
| ) |
Definition at line 2090 of file pgstat.c.
References get_tabstat_entry(), PgStat_TableCounts::t_changed_tuples, PgStat_TableStatus::t_counts, PgStat_TableCounts::t_delta_dead_tuples, PgStat_TableCounts::t_delta_live_tuples, TwoPhasePgStatRecord::t_id, TwoPhasePgStatRecord::t_shared, PgStat_TableCounts::t_tuples_deleted, PgStat_TableCounts::t_tuples_inserted, PgStat_TableCounts::t_tuples_updated, TwoPhasePgStatRecord::tuples_deleted, TwoPhasePgStatRecord::tuples_inserted, and TwoPhasePgStatRecord::tuples_updated.
{
TwoPhasePgStatRecord *rec = (TwoPhasePgStatRecord *) recdata;
PgStat_TableStatus *pgstat_info;
/* Find or create a tabstat entry for the rel */
pgstat_info = get_tabstat_entry(rec->t_id, rec->t_shared);
/* Same math as in AtEOXact_PgStat, commit case */
pgstat_info->t_counts.t_tuples_inserted += rec->tuples_inserted;
pgstat_info->t_counts.t_tuples_updated += rec->tuples_updated;
pgstat_info->t_counts.t_tuples_deleted += rec->tuples_deleted;
pgstat_info->t_counts.t_delta_live_tuples +=
rec->tuples_inserted - rec->tuples_deleted;
pgstat_info->t_counts.t_delta_dead_tuples +=
rec->tuples_updated + rec->tuples_deleted;
pgstat_info->t_counts.t_changed_tuples +=
rec->tuples_inserted + rec->tuples_updated +
rec->tuples_deleted;
}
| void pgstat_update_heap_dead_tuples | ( | Relation | rel, | |
| int | delta | |||
| ) |
Definition at line 1838 of file pgstat.c.
References NULL, RelationData::pgstat_info, PgStat_TableStatus::t_counts, and PgStat_TableCounts::t_delta_dead_tuples.
Referenced by heap_page_prune().
{
PgStat_TableStatus *pgstat_info = rel->pgstat_info;
if (pgstat_info != NULL)
pgstat_info->t_counts.t_delta_dead_tuples -= delta;
}
| void pgstat_vacuum_stat | ( | void | ) |
Definition at line 911 of file pgstat.c.
References backend_read_statsfile(), CHECK_FOR_INTERRUPTS, PgStat_StatDBEntry::databaseid, DatabaseRelationId, PgStat_StatFuncEntry::functionid, PgStat_StatDBEntry::functions, hash_destroy(), HASH_FIND, hash_get_num_entries(), hash_search(), hash_seq_init(), hash_seq_search(), PgStat_MsgFuncpurge::m_databaseid, PgStat_MsgTabpurge::m_databaseid, PgStat_MsgFuncpurge::m_functionid, PgStat_MsgFuncpurge::m_hdr, PgStat_MsgTabpurge::m_hdr, PgStat_MsgFuncpurge::m_nentries, PgStat_MsgTabpurge::m_nentries, PgStat_MsgTabpurge::m_tableid, MyDatabaseId, NULL, offsetof, OidIsValid, PGINVALID_SOCKET, pgstat_collect_oids(), pgstat_drop_database(), PGSTAT_MTYPE_FUNCPURGE, PGSTAT_MTYPE_TABPURGE, PGSTAT_NUM_FUNCPURGE, PGSTAT_NUM_TABPURGE, pgstat_send(), pgstat_setheader(), pgStatSock, ProcedureRelationId, RelationRelationId, PgStat_StatTabEntry::tableid, and PgStat_StatDBEntry::tables.
Referenced by do_autovacuum(), and vacuum().
{
HTAB *htab;
PgStat_MsgTabpurge msg;
PgStat_MsgFuncpurge f_msg;
HASH_SEQ_STATUS hstat;
PgStat_StatDBEntry *dbentry;
PgStat_StatTabEntry *tabentry;
PgStat_StatFuncEntry *funcentry;
int len;
if (pgStatSock == PGINVALID_SOCKET)
return;
/*
* If not done for this transaction, read the statistics collector stats
* file into some hash tables.
*/
backend_read_statsfile();
/*
* Read pg_database and make a list of OIDs of all existing databases
*/
htab = pgstat_collect_oids(DatabaseRelationId);
/*
* Search the database hash table for dead databases and tell the
* collector to drop them.
*/
hash_seq_init(&hstat, pgStatDBHash);
while ((dbentry = (PgStat_StatDBEntry *) hash_seq_search(&hstat)) != NULL)
{
Oid dbid = dbentry->databaseid;
CHECK_FOR_INTERRUPTS();
/* the DB entry for shared tables (with InvalidOid) is never dropped */
if (OidIsValid(dbid) &&
hash_search(htab, (void *) &dbid, HASH_FIND, NULL) == NULL)
pgstat_drop_database(dbid);
}
/* Clean up */
hash_destroy(htab);
/*
* Lookup our own database entry; if not found, nothing more to do.
*/
dbentry = (PgStat_StatDBEntry *) hash_search(pgStatDBHash,
(void *) &MyDatabaseId,
HASH_FIND, NULL);
if (dbentry == NULL || dbentry->tables == NULL)
return;
/*
* Similarly to above, make a list of all known relations in this DB.
*/
htab = pgstat_collect_oids(RelationRelationId);
/*
* Initialize our messages table counter to zero
*/
msg.m_nentries = 0;
/*
* Check for all tables listed in stats hashtable if they still exist.
*/
hash_seq_init(&hstat, dbentry->tables);
while ((tabentry = (PgStat_StatTabEntry *) hash_seq_search(&hstat)) != NULL)
{
Oid tabid = tabentry->tableid;
CHECK_FOR_INTERRUPTS();
if (hash_search(htab, (void *) &tabid, HASH_FIND, NULL) != NULL)
continue;
/*
* Not there, so add this table's Oid to the message
*/
msg.m_tableid[msg.m_nentries++] = tabid;
/*
* If the message is full, send it out and reinitialize to empty
*/
if (msg.m_nentries >= PGSTAT_NUM_TABPURGE)
{
len = offsetof(PgStat_MsgTabpurge, m_tableid[0])
+msg.m_nentries * sizeof(Oid);
pgstat_setheader(&msg.m_hdr, PGSTAT_MTYPE_TABPURGE);
msg.m_databaseid = MyDatabaseId;
pgstat_send(&msg, len);
msg.m_nentries = 0;
}
}
/*
* Send the rest
*/
if (msg.m_nentries > 0)
{
len = offsetof(PgStat_MsgTabpurge, m_tableid[0])
+msg.m_nentries * sizeof(Oid);
pgstat_setheader(&msg.m_hdr, PGSTAT_MTYPE_TABPURGE);
msg.m_databaseid = MyDatabaseId;
pgstat_send(&msg, len);
}
/* Clean up */
hash_destroy(htab);
/*
* Now repeat the above steps for functions. However, we needn't bother
* in the common case where no function stats are being collected.
*/
if (dbentry->functions != NULL &&
hash_get_num_entries(dbentry->functions) > 0)
{
htab = pgstat_collect_oids(ProcedureRelationId);
pgstat_setheader(&f_msg.m_hdr, PGSTAT_MTYPE_FUNCPURGE);
f_msg.m_databaseid = MyDatabaseId;
f_msg.m_nentries = 0;
hash_seq_init(&hstat, dbentry->functions);
while ((funcentry = (PgStat_StatFuncEntry *) hash_seq_search(&hstat)) != NULL)
{
Oid funcid = funcentry->functionid;
CHECK_FOR_INTERRUPTS();
if (hash_search(htab, (void *) &funcid, HASH_FIND, NULL) != NULL)
continue;
/*
* Not there, so add this function's Oid to the message
*/
f_msg.m_functionid[f_msg.m_nentries++] = funcid;
/*
* If the message is full, send it out and reinitialize to empty
*/
if (f_msg.m_nentries >= PGSTAT_NUM_FUNCPURGE)
{
len = offsetof(PgStat_MsgFuncpurge, m_functionid[0])
+f_msg.m_nentries * sizeof(Oid);
pgstat_send(&f_msg, len);
f_msg.m_nentries = 0;
}
}
/*
* Send the rest
*/
if (f_msg.m_nentries > 0)
{
len = offsetof(PgStat_MsgFuncpurge, m_functionid[0])
+f_msg.m_nentries * sizeof(Oid);
pgstat_send(&f_msg, len);
}
hash_destroy(htab);
}
}
| static void pgstat_write_db_statsfile | ( | PgStat_StatDBEntry * | dbentry, | |
| bool | permanent | |||
| ) | [static] |
Definition at line 3643 of file pgstat.c.
References AllocateFile(), PgStat_StatDBEntry::databaseid, DEBUG2, elog, ereport, errcode_for_file_access(), errmsg(), FreeFile(), PgStat_StatDBEntry::functions, get_dbstat_filename(), hash_seq_init(), hash_seq_search(), LOG, MAXPGPATH, NULL, PG_BINARY_W, PgStat_StatDBEntry::tables, and unlink().
Referenced by pgstat_write_statsfiles().
{
HASH_SEQ_STATUS tstat;
HASH_SEQ_STATUS fstat;
PgStat_StatTabEntry *tabentry;
PgStat_StatFuncEntry *funcentry;
FILE *fpout;
int32 format_id;
Oid dbid = dbentry->databaseid;
int rc;
char tmpfile[MAXPGPATH];
char statfile[MAXPGPATH];
get_dbstat_filename(permanent, true, dbid, tmpfile, MAXPGPATH);
get_dbstat_filename(permanent, false, dbid, statfile, MAXPGPATH);
elog(DEBUG2, "writing statsfile '%s'", statfile);
/*
* Open the statistics temp file to write out the current values.
*/
fpout = AllocateFile(tmpfile, PG_BINARY_W);
if (fpout == NULL)
{
ereport(LOG,
(errcode_for_file_access(),
errmsg("could not open temporary statistics file \"%s\": %m",
tmpfile)));
return;
}
/*
* Write the file header --- currently just a format ID.
*/
format_id = PGSTAT_FILE_FORMAT_ID;
rc = fwrite(&format_id, sizeof(format_id), 1, fpout);
(void) rc; /* we'll check for error with ferror */
/*
* Walk through the database's access stats per table.
*/
hash_seq_init(&tstat, dbentry->tables);
while ((tabentry = (PgStat_StatTabEntry *) hash_seq_search(&tstat)) != NULL)
{
fputc('T', fpout);
rc = fwrite(tabentry, sizeof(PgStat_StatTabEntry), 1, fpout);
(void) rc; /* we'll check for error with ferror */
}
/*
* Walk through the database's function stats table.
*/
hash_seq_init(&fstat, dbentry->functions);
while ((funcentry = (PgStat_StatFuncEntry *) hash_seq_search(&fstat)) != NULL)
{
fputc('F', fpout);
rc = fwrite(funcentry, sizeof(PgStat_StatFuncEntry), 1, fpout);
(void) rc; /* we'll check for error with ferror */
}
/*
* No more output to be done. Close the temp file and replace the old
* pgstat.stat with it. The ferror() check replaces testing for error
* after each individual fputc or fwrite above.
*/
fputc('E', fpout);
if (ferror(fpout))
{
ereport(LOG,
(errcode_for_file_access(),
errmsg("could not write temporary statistics file \"%s\": %m",
tmpfile)));
FreeFile(fpout);
unlink(tmpfile);
}
else if (FreeFile(fpout) < 0)
{
ereport(LOG,
(errcode_for_file_access(),
errmsg("could not close temporary statistics file \"%s\": %m",
tmpfile)));
unlink(tmpfile);
}
else if (rename(tmpfile, statfile) < 0)
{
ereport(LOG,
(errcode_for_file_access(),
errmsg("could not rename temporary statistics file \"%s\" to \"%s\": %m",
tmpfile, statfile)));
unlink(tmpfile);
}
if (permanent)
{
get_dbstat_filename(false, false, dbid, statfile, MAXPGPATH);
elog(DEBUG2, "removing temporary stat file '%s'", statfile);
unlink(statfile);
}
}
| static bool pgstat_write_statsfile_needed | ( | void | ) | [static] |
Definition at line 5008 of file pgstat.c.
References slist_is_empty().
Referenced by PgstatCollectorMain().
{
if (!slist_is_empty(&last_statrequests))
return true;
/* Everything was written recently */
return false;
}
Definition at line 3486 of file pgstat.c.
References AllocateFile(), slist_mutable_iter::cur, PgStat_StatDBEntry::databaseid, DEBUG2, elog, ereport, errcode_for_file_access(), errmsg(), FreeFile(), GetCurrentTimestamp(), hash_seq_init(), hash_seq_search(), LOG, next(), NULL, offsetof, pfree(), PG_BINARY_W, pgstat_db_requested(), pgstat_stat_filename, PGSTAT_STAT_PERMANENT_FILENAME, PGSTAT_STAT_PERMANENT_TMPFILE, pgstat_stat_tmpname, pgstat_write_db_statsfile(), slist_container, slist_foreach_modify, slist_init(), slist_is_empty(), PgStat_StatDBEntry::stats_timestamp, PgStat_GlobalStats::stats_timestamp, and unlink().
Referenced by PgstatCollectorMain().
{
HASH_SEQ_STATUS hstat;
PgStat_StatDBEntry *dbentry;
FILE *fpout;
int32 format_id;
const char *tmpfile = permanent ? PGSTAT_STAT_PERMANENT_TMPFILE : pgstat_stat_tmpname;
const char *statfile = permanent ? PGSTAT_STAT_PERMANENT_FILENAME : pgstat_stat_filename;
int rc;
elog(DEBUG2, "writing statsfile '%s'", statfile);
/*
* Open the statistics temp file to write out the current values.
*/
fpout = AllocateFile(tmpfile, PG_BINARY_W);
if (fpout == NULL)
{
ereport(LOG,
(errcode_for_file_access(),
errmsg("could not open temporary statistics file \"%s\": %m",
tmpfile)));
return;
}
/*
* Set the timestamp of the stats file.
*/
globalStats.stats_timestamp = GetCurrentTimestamp();
/*
* Write the file header --- currently just a format ID.
*/
format_id = PGSTAT_FILE_FORMAT_ID;
rc = fwrite(&format_id, sizeof(format_id), 1, fpout);
(void) rc; /* we'll check for error with ferror */
/*
* Write global stats struct
*/
rc = fwrite(&globalStats, sizeof(globalStats), 1, fpout);
(void) rc; /* we'll check for error with ferror */
/*
* Walk through the database table.
*/
hash_seq_init(&hstat, pgStatDBHash);
while ((dbentry = (PgStat_StatDBEntry *) hash_seq_search(&hstat)) != NULL)
{
/*
* Write out the tables and functions into the DB stat file, if
* required.
*
* We need to do this before the dbentry write, to ensure the
* timestamps written to both are consistent.
*/
if (allDbs || pgstat_db_requested(dbentry->databaseid))
{
dbentry->stats_timestamp = globalStats.stats_timestamp;
pgstat_write_db_statsfile(dbentry, permanent);
}
/*
* Write out the DB entry. We don't write the tables or functions
* pointers, since they're of no use to any other process.
*/
fputc('D', fpout);
rc = fwrite(dbentry, offsetof(PgStat_StatDBEntry, tables), 1, fpout);
(void) rc; /* we'll check for error with ferror */
}
/*
* No more output to be done. Close the temp file and replace the old
* pgstat.stat with it. The ferror() check replaces testing for error
* after each individual fputc or fwrite above.
*/
fputc('E', fpout);
if (ferror(fpout))
{
ereport(LOG,
(errcode_for_file_access(),
errmsg("could not write temporary statistics file \"%s\": %m",
tmpfile)));
FreeFile(fpout);
unlink(tmpfile);
}
else if (FreeFile(fpout) < 0)
{
ereport(LOG,
(errcode_for_file_access(),
errmsg("could not close temporary statistics file \"%s\": %m",
tmpfile)));
unlink(tmpfile);
}
else if (rename(tmpfile, statfile) < 0)
{
ereport(LOG,
(errcode_for_file_access(),
errmsg("could not rename temporary statistics file \"%s\" to \"%s\": %m",
tmpfile, statfile)));
unlink(tmpfile);
}
if (permanent)
unlink(pgstat_stat_filename);
/*
* Now throw away the list of requests. Note that requests sent after we
* started the write are still waiting on the network socket.
*/
if (!slist_is_empty(&last_statrequests))
{
slist_mutable_iter iter;
slist_foreach_modify(iter, &last_statrequests)
{
DBWriteRequest *req;
req = slist_container(DBWriteRequest, next, iter.cur);
pfree(req);
}
slist_init(&last_statrequests);
}
}
| NON_EXEC_STATIC void PgstatCollectorMain | ( | int | argc, | |
| char * | argv[] | |||
| ) |
Definition at line 3045 of file pgstat.c.
References EAGAIN, EINTR, elog, ereport, errcode_for_socket_access(), errmsg(), ERROR, EWOULDBLOCK, FATAL, got_SIGHUP, init_ps_display(), InitializeLatchSupport(), InitLatch(), InvalidOid, IsUnderPostmaster, MyProcPid, MyStartTime, need_exit, NULL, PG_SETMASK, PGC_SIGHUP, pgstat_exit(), PGSTAT_MTYPE_ANALYZE, PGSTAT_MTYPE_AUTOVAC_START, PGSTAT_MTYPE_BGWRITER, PGSTAT_MTYPE_DEADLOCK, PGSTAT_MTYPE_DROPDB, PGSTAT_MTYPE_DUMMY, PGSTAT_MTYPE_FUNCPURGE, PGSTAT_MTYPE_FUNCSTAT, PGSTAT_MTYPE_INQUIRY, PGSTAT_MTYPE_RECOVERYCONFLICT, PGSTAT_MTYPE_RESETCOUNTER, PGSTAT_MTYPE_RESETSHAREDCOUNTER, PGSTAT_MTYPE_RESETSINGLECOUNTER, PGSTAT_MTYPE_TABPURGE, PGSTAT_MTYPE_TABSTAT, PGSTAT_MTYPE_TEMPFILE, PGSTAT_MTYPE_VACUUM, pgstat_read_statsfiles(), pgstat_recv_analyze(), pgstat_recv_autovac(), pgstat_recv_bgwriter(), pgstat_recv_deadlock(), pgstat_recv_dropdb(), pgstat_recv_funcpurge(), pgstat_recv_funcstat(), pgstat_recv_inquiry(), pgstat_recv_recoveryconflict(), pgstat_recv_resetcounter(), pgstat_recv_resetsharedcounter(), pgstat_recv_resetsinglecounter(), pgstat_recv_tabpurge(), pgstat_recv_tabstat(), pgstat_recv_tempfile(), pgstat_recv_vacuum(), pgstat_sighup_handler(), pgstat_write_statsfile_needed(), pgstat_write_statsfiles(), pgStatRunningInCollector, pgStatSock, pgwin32_noblock, pqsignal(), ProcessConfigFile(), recv, ResetLatch(), SIG_DFL, SIG_IGN, SIGALRM, SIGCHLD, SIGCONT, SIGHUP, SIGPIPE, SIGQUIT, SIGTTIN, SIGTTOU, SIGUSR1, SIGUSR2, SIGWINCH, UnBlockSig, WaitLatchOrSocket(), WL_LATCH_SET, WL_POSTMASTER_DEATH, WL_SOCKET_READABLE, and WL_TIMEOUT.
Referenced by pgstat_start().
{
int len;
PgStat_Msg msg;
int wr;
IsUnderPostmaster = true; /* we are a postmaster subprocess now */
MyProcPid = getpid(); /* reset MyProcPid */
MyStartTime = time(NULL); /* record Start Time for logging */
/*
* If possible, make this process a group leader, so that the postmaster
* can signal any child processes too. (pgstat probably never has any
* child processes, but for consistency we make all postmaster child
* processes do this.)
*/
#ifdef HAVE_SETSID
if (setsid() < 0)
elog(FATAL, "setsid() failed: %m");
#endif
InitializeLatchSupport(); /* needed for latch waits */
/* Initialize private latch for use by signal handlers */
InitLatch(&pgStatLatch);
/*
* Ignore all signals usually bound to some action in the postmaster,
* except SIGHUP and SIGQUIT. Note we don't need a SIGUSR1 handler to
* support latch operations, because pgStatLatch is local not shared.
*/
pqsignal(SIGHUP, pgstat_sighup_handler);
pqsignal(SIGINT, SIG_IGN);
pqsignal(SIGTERM, SIG_IGN);
pqsignal(SIGQUIT, pgstat_exit);
pqsignal(SIGALRM, SIG_IGN);
pqsignal(SIGPIPE, SIG_IGN);
pqsignal(SIGUSR1, SIG_IGN);
pqsignal(SIGUSR2, SIG_IGN);
pqsignal(SIGCHLD, SIG_DFL);
pqsignal(SIGTTIN, SIG_DFL);
pqsignal(SIGTTOU, SIG_DFL);
pqsignal(SIGCONT, SIG_DFL);
pqsignal(SIGWINCH, SIG_DFL);
PG_SETMASK(&UnBlockSig);
/*
* Identify myself via ps
*/
init_ps_display("stats collector process", "", "", "");
/*
* Read in an existing statistics stats file or initialize the stats to
* zero.
*/
pgStatRunningInCollector = true;
pgStatDBHash = pgstat_read_statsfiles(InvalidOid, true, true);
/*
* Loop to process messages until we get SIGQUIT or detect ungraceful
* death of our parent postmaster.
*
* For performance reasons, we don't want to do ResetLatch/WaitLatch after
* every message; instead, do that only after a recv() fails to obtain a
* message. (This effectively means that if backends are sending us stuff
* like mad, we won't notice postmaster death until things slack off a
* bit; which seems fine.) To do that, we have an inner loop that
* iterates as long as recv() succeeds. We do recognize got_SIGHUP inside
* the inner loop, which means that such interrupts will get serviced but
* the latch won't get cleared until next time there is a break in the
* action.
*/
for (;;)
{
/* Clear any already-pending wakeups */
ResetLatch(&pgStatLatch);
/*
* Quit if we get SIGQUIT from the postmaster.
*/
if (need_exit)
break;
/*
* Inner loop iterates as long as we keep getting messages, or until
* need_exit becomes set.
*/
while (!need_exit)
{
/*
* Reload configuration if we got SIGHUP from the postmaster.
*/
if (got_SIGHUP)
{
got_SIGHUP = false;
ProcessConfigFile(PGC_SIGHUP);
}
/*
* Write the stats file if a new request has arrived that is not
* satisfied by existing file.
*/
if (pgstat_write_statsfile_needed())
pgstat_write_statsfiles(false, false);
/*
* Try to receive and process a message. This will not block,
* since the socket is set to non-blocking mode.
*
* XXX On Windows, we have to force pgwin32_recv to cooperate,
* despite the previous use of pg_set_noblock() on the socket.
* This is extremely broken and should be fixed someday.
*/
#ifdef WIN32
pgwin32_noblock = 1;
#endif
len = recv(pgStatSock, (char *) &msg,
sizeof(PgStat_Msg), 0);
#ifdef WIN32
pgwin32_noblock = 0;
#endif
if (len < 0)
{
if (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR)
break; /* out of inner loop */
ereport(ERROR,
(errcode_for_socket_access(),
errmsg("could not read statistics message: %m")));
}
/*
* We ignore messages that are smaller than our common header
*/
if (len < sizeof(PgStat_MsgHdr))
continue;
/*
* The received length must match the length in the header
*/
if (msg.msg_hdr.m_size != len)
continue;
/*
* O.K. - we accept this message. Process it.
*/
switch (msg.msg_hdr.m_type)
{
case PGSTAT_MTYPE_DUMMY:
break;
case PGSTAT_MTYPE_INQUIRY:
pgstat_recv_inquiry((PgStat_MsgInquiry *) &msg, len);
break;
case PGSTAT_MTYPE_TABSTAT:
pgstat_recv_tabstat((PgStat_MsgTabstat *) &msg, len);
break;
case PGSTAT_MTYPE_TABPURGE:
pgstat_recv_tabpurge((PgStat_MsgTabpurge *) &msg, len);
break;
case PGSTAT_MTYPE_DROPDB:
pgstat_recv_dropdb((PgStat_MsgDropdb *) &msg, len);
break;
case PGSTAT_MTYPE_RESETCOUNTER:
pgstat_recv_resetcounter((PgStat_MsgResetcounter *) &msg,
len);
break;
case PGSTAT_MTYPE_RESETSHAREDCOUNTER:
pgstat_recv_resetsharedcounter(
(PgStat_MsgResetsharedcounter *) &msg,
len);
break;
case PGSTAT_MTYPE_RESETSINGLECOUNTER:
pgstat_recv_resetsinglecounter(
(PgStat_MsgResetsinglecounter *) &msg,
len);
break;
case PGSTAT_MTYPE_AUTOVAC_START:
pgstat_recv_autovac((PgStat_MsgAutovacStart *) &msg, len);
break;
case PGSTAT_MTYPE_VACUUM:
pgstat_recv_vacuum((PgStat_MsgVacuum *) &msg, len);
break;
case PGSTAT_MTYPE_ANALYZE:
pgstat_recv_analyze((PgStat_MsgAnalyze *) &msg, len);
break;
case PGSTAT_MTYPE_BGWRITER:
pgstat_recv_bgwriter((PgStat_MsgBgWriter *) &msg, len);
break;
case PGSTAT_MTYPE_FUNCSTAT:
pgstat_recv_funcstat((PgStat_MsgFuncstat *) &msg, len);
break;
case PGSTAT_MTYPE_FUNCPURGE:
pgstat_recv_funcpurge((PgStat_MsgFuncpurge *) &msg, len);
break;
case PGSTAT_MTYPE_RECOVERYCONFLICT:
pgstat_recv_recoveryconflict((PgStat_MsgRecoveryConflict *) &msg, len);
break;
case PGSTAT_MTYPE_DEADLOCK:
pgstat_recv_deadlock((PgStat_MsgDeadlock *) &msg, len);
break;
case PGSTAT_MTYPE_TEMPFILE:
pgstat_recv_tempfile((PgStat_MsgTempFile *) &msg, len);
break;
default:
break;
}
} /* end of inner message-processing loop */
/* Sleep until there's something to do */
#ifndef WIN32
wr = WaitLatchOrSocket(&pgStatLatch,
WL_LATCH_SET | WL_POSTMASTER_DEATH | WL_SOCKET_READABLE,
pgStatSock,
-1L);
#else
/*
* Windows, at least in its Windows Server 2003 R2 incarnation,
* sometimes loses FD_READ events. Waking up and retrying the recv()
* fixes that, so don't sleep indefinitely. This is a crock of the
* first water, but until somebody wants to debug exactly what's
* happening there, this is the best we can do. The two-second
* timeout matches our pre-9.2 behavior, and needs to be short enough
* to not provoke "pgstat wait timeout" complaints from
* backend_read_statsfile.
*/
wr = WaitLatchOrSocket(&pgStatLatch,
WL_LATCH_SET | WL_POSTMASTER_DEATH | WL_SOCKET_READABLE | WL_TIMEOUT,
pgStatSock,
2 * 1000L /* msec */ );
#endif
/*
* Emergency bailout if postmaster has died. This is to avoid the
* necessity for manual cleanup of all postmaster children.
*/
if (wr & WL_POSTMASTER_DEATH)
break;
} /* end of outer loop */
/*
* Save the final stats to reuse at next startup.
*/
pgstat_write_statsfiles(true, true);
exit(0);
}
| void PostPrepare_PgStat | ( | void | ) |
Definition at line 2057 of file pgstat.c.
References PgStat_SubXactStatus::first, PgStat_TableXactStatus::next, NULL, PgStat_TableXactStatus::parent, pgstat_clear_snapshot(), PgStat_TableStatus::trans, and trans.
Referenced by PrepareTransaction().
{
PgStat_SubXactStatus *xact_state;
/*
* We don't bother to free any of the transactional state, since it's all
* in TopTransactionContext and will go away anyway.
*/
xact_state = pgStatXactStack;
if (xact_state != NULL)
{
PgStat_TableXactStatus *trans;
for (trans = xact_state->first; trans != NULL; trans = trans->next)
{
PgStat_TableStatus *tabstat;
tabstat = trans->parent;
tabstat->trans = NULL;
}
}
pgStatXactStack = NULL;
/* Make sure any stats snapshot is thrown away */
pgstat_clear_snapshot();
}
| static void reset_dbentry_counters | ( | PgStat_StatDBEntry * | dbentry | ) | [static] |
Definition at line 3345 of file pgstat.c.
References HASHCTL::entrysize, PgStat_StatDBEntry::functions, GetCurrentTimestamp(), HASHCTL::hash, hash_create(), HASH_ELEM, HASH_FUNCTION, HASHCTL::keysize, PgStat_StatDBEntry::last_autovac_time, PgStat_StatDBEntry::n_block_read_time, PgStat_StatDBEntry::n_block_write_time, PgStat_StatDBEntry::n_blocks_fetched, PgStat_StatDBEntry::n_blocks_hit, PgStat_StatDBEntry::n_conflict_bufferpin, PgStat_StatDBEntry::n_conflict_lock, PgStat_StatDBEntry::n_conflict_snapshot, PgStat_StatDBEntry::n_conflict_startup_deadlock, PgStat_StatDBEntry::n_conflict_tablespace, PgStat_StatDBEntry::n_deadlocks, PgStat_StatDBEntry::n_temp_bytes, PgStat_StatDBEntry::n_temp_files, PgStat_StatDBEntry::n_tuples_deleted, PgStat_StatDBEntry::n_tuples_fetched, PgStat_StatDBEntry::n_tuples_inserted, PgStat_StatDBEntry::n_tuples_returned, PgStat_StatDBEntry::n_tuples_updated, PgStat_StatDBEntry::n_xact_commit, PgStat_StatDBEntry::n_xact_rollback, PGSTAT_FUNCTION_HASH_SIZE, PGSTAT_TAB_HASH_SIZE, PgStat_StatDBEntry::stat_reset_timestamp, PgStat_StatDBEntry::stats_timestamp, and PgStat_StatDBEntry::tables.
Referenced by pgstat_get_db_entry(), and pgstat_recv_resetcounter().
{
HASHCTL hash_ctl;
dbentry->n_xact_commit = 0;
dbentry->n_xact_rollback = 0;
dbentry->n_blocks_fetched = 0;
dbentry->n_blocks_hit = 0;
dbentry->n_tuples_returned = 0;
dbentry->n_tuples_fetched = 0;
dbentry->n_tuples_inserted = 0;
dbentry->n_tuples_updated = 0;
dbentry->n_tuples_deleted = 0;
dbentry->last_autovac_time = 0;
dbentry->n_conflict_tablespace = 0;
dbentry->n_conflict_lock = 0;
dbentry->n_conflict_snapshot = 0;
dbentry->n_conflict_bufferpin = 0;
dbentry->n_conflict_startup_deadlock = 0;
dbentry->n_temp_files = 0;
dbentry->n_temp_bytes = 0;
dbentry->n_deadlocks = 0;
dbentry->n_block_read_time = 0;
dbentry->n_block_write_time = 0;
dbentry->stat_reset_timestamp = GetCurrentTimestamp();
dbentry->stats_timestamp = 0;
memset(&hash_ctl, 0, sizeof(hash_ctl));
hash_ctl.keysize = sizeof(Oid);
hash_ctl.entrysize = sizeof(PgStat_StatTabEntry);
hash_ctl.hash = oid_hash;
dbentry->tables = hash_create("Per-database table",
PGSTAT_TAB_HASH_SIZE,
&hash_ctl,
HASH_ELEM | HASH_FUNCTION);
hash_ctl.keysize = sizeof(Oid);
hash_ctl.entrysize = sizeof(PgStat_StatFuncEntry);
hash_ctl.hash = oid_hash;
dbentry->functions = hash_create("Per-database function",
PGSTAT_FUNCTION_HASH_SIZE,
&hash_ctl,
HASH_ELEM | HASH_FUNCTION);
}
char* BackendActivityBuffer = NULL [static] |
Size BackendActivityBufferSize = 0 [static] |
char* BackendAppnameBuffer = NULL [static] |
char* BackendClientHostnameBuffer = NULL [static] |
PgBackendStatus* BackendStatusArray = NULL [static] |
Definition at line 129 of file pgstat.c.
Referenced by AbsorbFsyncRequests(), BgBufferSync(), BufferSync(), CheckpointerMain(), and LogCheckpointEnd().
PgStat_GlobalStats globalStats [static] |
volatile bool got_SIGHUP = false [static] |
Definition at line 237 of file pgstat.c.
Referenced by pgstat_sighup_handler(), and PgstatCollectorMain().
bool have_function_stats = false [static] |
Definition at line 177 of file pgstat.c.
Referenced by pgstat_end_function_usage(), pgstat_report_stat(), and pgstat_send_funcstats().
time_t last_pgstat_start_time [static] |
Definition at line 141 of file pgstat.c.
Referenced by allow_immediate_pgstat_restart(), and pgstat_start().
slist_head last_statrequests = SLIST_STATIC_INIT(last_statrequests) [static] |
PgBackendStatus* localBackendStatusTable = NULL [static] |
int localNumBackends = 0 [static] |
Definition at line 216 of file pgstat.c.
Referenced by pgstat_clear_snapshot(), pgstat_fetch_stat_beentry(), pgstat_fetch_stat_numbackends(), and pgstat_read_current_status().
PgBackendStatus* MyBEEntry = NULL [static] |
Definition at line 236 of file pgstat.c.
Referenced by pgstat_exit(), and PgstatCollectorMain().
| char* pgstat_stat_directory = NULL |
Definition at line 120 of file pgstat.c.
Referenced by assign_pgstat_temp_directory(), get_dbstat_filename(), pgstat_reset_all(), and pgstat_reset_remove_files().
| char* pgstat_stat_filename = NULL |
Definition at line 121 of file pgstat.c.
Referenced by assign_pgstat_temp_directory(), pgstat_read_db_statsfile_timestamp(), pgstat_read_statsfiles(), and pgstat_write_statsfiles().
| char* pgstat_stat_tmpname = NULL |
Definition at line 122 of file pgstat.c.
Referenced by assign_pgstat_temp_directory(), and pgstat_write_statsfiles().
| bool pgstat_track_activities = false |
Definition at line 111 of file pgstat.c.
Referenced by pgstat_report_activity(), pgstat_report_waiting(), and pgstat_report_xact_timestamp().
| int pgstat_track_activity_query_size = 1024 |
Definition at line 114 of file pgstat.c.
Referenced by BackendStatusShmemSize(), CreateSharedBackendStatus(), pgss_memsize(), pgss_shmem_startup(), pgstat_bestart(), pgstat_get_crashed_backend_activity(), pgstat_read_current_status(), and pgstat_report_activity().
| bool pgstat_track_counts = false |
Definition at line 112 of file pgstat.c.
Referenced by autovac_init(), AutoVacuumingActive(), pgstat_initstats(), pgstat_report_analyze(), pgstat_report_deadlock(), pgstat_report_recovery_conflict(), pgstat_report_tempfile(), and pgstat_report_vacuum().
| int pgstat_track_functions = TRACK_FUNC_OFF |
struct sockaddr_storage pgStatAddr [static] |
Definition at line 139 of file pgstat.c.
Referenced by pgstat_init().
Definition at line 197 of file pgstat.c.
Referenced by pgstat_send_tabstat().
Definition at line 198 of file pgstat.c.
Referenced by pgstat_send_tabstat().
HTAB* pgStatDBHash = NULL [static] |
HTAB* pgStatFunctions = NULL [static] |
Latch pgStatLatch [static] |
MemoryContext pgStatLocalContext = NULL [static] |
bool pgStatRunningInCollector = false [static] |
Definition at line 143 of file pgstat.c.
Referenced by backend_read_statsfile(), pgstat_read_current_status(), pgstat_read_db_statsfile(), pgstat_read_db_statsfile_timestamp(), pgstat_read_statsfiles(), and PgstatCollectorMain().
| NON_EXEC_STATIC pgsocket pgStatSock = PGINVALID_SOCKET |
Definition at line 135 of file pgstat.c.
Referenced by pgstat_drop_database(), pgstat_init(), pgstat_initstats(), pgstat_ping(), pgstat_report_analyze(), pgstat_report_autovac(), pgstat_report_deadlock(), pgstat_report_recovery_conflict(), pgstat_report_tempfile(), pgstat_report_vacuum(), pgstat_reset_counters(), pgstat_reset_shared_counters(), pgstat_reset_single_counter(), pgstat_send(), pgstat_send_tabstat(), pgstat_start(), pgstat_vacuum_stat(), and PgstatCollectorMain().
TabStatusArray* pgStatTabList = NULL [static] |
int pgStatXactCommit = 0 [static] |
Definition at line 195 of file pgstat.c.
Referenced by AtEOXact_PgStat(), pgstat_report_stat(), and pgstat_send_tabstat().
int pgStatXactRollback = 0 [static] |
Definition at line 196 of file pgstat.c.
Referenced by AtEOXact_PgStat(), pgstat_report_stat(), and pgstat_send_tabstat().
PgStat_SubXactStatus* pgStatXactStack = NULL [static] |
instr_time total_func_time [static] |
Definition at line 244 of file pgstat.c.
Referenced by pgstat_end_function_usage(), and pgstat_init_function_usage().
1.7.1