Red Hat Network 4.1.0: Reference Guide
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# C.10. RHN Satellite Server

The probes in this section may be applied to the RHN Satellite Server itself to monitor its health and performance. Since these probes run locally, no specific application or transport protocols are required.

## C.10.1. RHN Satellite Server::Disk Space

The RHN Satellite Server::Disk Space probe monitors the free disk space on a Satellite and collects the following metrics:

- File System Used — The percent of the current file system now in use.

- Space Used — The file size used by the current file system.

- Space Available — The file size available to the current file system.

Field | Value
--- | ---
Device Pathname* | /dev/hda1
Critical Maximum File System Used |
Warning Maximum File System Used |
Critical Maximum Space Used |
Warning Maximum Space Used |
Critical Maximum Space Available |
Warning Maximum Space Available |

Table C-63. RHN Satellite Server::Disk Space settings

## C.10.2. RHN Satellite Server::Execution Time

The RHN Satellite Server::Execution Time probe monitors the execution time for probes run from a Satellite and collects the following metric:

- Probe Execution Time Average — The seconds required to fully execute a probe.

Field | Value
--- | ---
Critical Maximum Probe Execution Time Average |
Warning Maximum Probe Execution Time Average |

Table C-64. RHN Satellite Server::Execution Time settings

## C.10.3. RHN Satellite Server::Interface Traffic

The RHN Satellite Server::Interface Traffic probe monitors the interface traffic on a Satellite and collects the following metrics:

- Input Rate — The amount of traffic in bytes per second the device receives.

- Output Rate — The amount of traffic in bytes per second the device sends.

Field | Value
--- | ---
Interface* | eth0
Timeout (seconds)* | 30
Critical Maximum Input Rate |
Critical Maximum Output Rate |

Table C-65. RHN Satellite Server::Interface Traffic settings

## C.10.4. RHN Satellite Server::Latency

The RHN Satellite Server::Latency probe monitors the latency of probes on a Satellite and collects the following metric:

- Probe Latency Average — The lag in seconds between the time a probe becomes ready to run and the time it is actually run. Under normal conditions, this is generally less than a second. When a Satellite is overloaded (because it has too many probes with respect to their average execution time), the number goes up.

Field | Value
--- | ---
Critical Maximum Probe Latency Average |
Warning Maximum Probe Latency Average |

Table C-66. RHN Satellite Server::Latency settings

## C.10.5. RHN Satellite Server::Load

The RHN Satellite Server::Load probe monitors the CPU load on a Satellite and collects the following metric:

- Load — The load average on the CPU for a 1-, 5-, and 15-minute period.

Field | Value
--- | ---
Critical Maximum 1-minute Average |
Warning Maximum 1-minute Average |
Critical Maximum 5-minute Average |
Warning Maximum 5-minute Average |
Critical Maximum 15-minute Average |
Warning Maximum 15-minute Average |

Table C-67. RHN Satellite Server::Load settings

## C.10.6. RHN Satellite Server::Probe Count

The RHN Satellite Server::Probe Count probe monitors the number of probes on a Satellite and collects the following metric:

- Probes — The number of individual probes running on a Satellite.

Field | Value
--- | ---
Critical Maximum Probe Count |
Warning Maximum Probe Count |

Table C-68. RHN Satellite Server::Probe Count settings

## C.10.7. RHN Satellite Server::Process Counts

The RHN Satellite Server::Process Counts probe monitors the number of processes on a Satellite and collects the following metrics:

- Blocked — The number of processes that have been switched to the waiting queue and waiting state.

- Child — The number of processes spawned by another process already running on the machine.

- Defunct — The number of processes that have terminated (either because they have been killed by a signal or have called `exit()`) and whose parent processes have not yet received notification of their termination by executing some form of the `wait()` system call.

- Stopped — The number of processes that have stopped before their executions could be completed.

- Sleeping — A process that is in the `Interruptible` sleep state and that can later be reintroduced into memory, resuming execution where it left off.

Field | Value
--- | ---
Critical Maximum Blocked Processes |
Warning Maximum Blocked Processes |
Critical Maximum Child Processes |
Warning Maximum Child Processes |
Critical Maximum Defunct Processes |
Warning Maximum Defunct Processes |
Critical Maximum Stopped Processes |
Warning Maximum Stopped Processes |
Critical Maximum Sleeping Processes |
Warning Maximum Sleeping Processes |

Table C-69. RHN Satellite Server::Process Counts settings

## C.10.8. RHN Satellite Server::Processes

The RHN Satellite Server::Processes probe monitors the number of processes on a Satellite and collects the following metric:

- Processes — The number of processes running simultaneously on the machine.

Field | Value
--- | ---
Critical Maximum Processes |
Warning Maximum Processes |

Table C-70. RHN Satellite Server::Processes settings

## C.10.9. RHN Satellite Server::Process Health

The RHN Satellite Server::Process Health probe monitors customer-specified processes and collects the following metrics:

- CPU Usage — The CPU usage percent for a given process.

- Child Process Groups — The number of child processes spawned from the specified parent process. A child process inherits most of its attributes, such as open files, from its parent.

- Threads — The number of running threads for a given process. A thread is the basic unit of CPU utilization, and consists of a program counter, a register set, and a stack space. A thread is also called a lightweight process.

- Physical Memory Used — The amount of physical memory in kilobytes being used by the specified process.

- Virtual Memory Used — The amount of virtual memory in kilobytes being used by the specified process, or the size of the process in real memory plus swap.

Specify the process by its command name or process ID. (PID). Entering a PID overrides the entry of a command name. If no command name or PID is entered, the error `Command not found` is displayed and the probe is set to a CRITICAL state.

Field | Value
--- | ---
Command Name |
Process ID (PID) file |
Timeout* | 15
Critical Maximum CPU Usage |
Warning Maximum CPU Usage |
Critical Maximum Child Process Groups |
Warning Maximum Child Process Groups |
Critical Maximum Threads |
Warning Maximum Threads |
Critical Maximum Physical Memory Used |
Warning Maximum Physical Memory Used |
Critical Maximum Virtual Memory Used |
Warning Maximum Virtual Memory Used |

Table C-71. RHN Satellite Server::Process Health settings

## C.10.10. RHN Satellite Server::Process Running

The RHN Satellite Server::Process Running probe verifies that the specified process is running. Specify the process by its command name or process ID. (PID). Entering a PID overrides the entry of a command name. A Critical status results if the probe cannot verify the command or PID.

Field | Value
--- | ---
Command Name |
Process ID (PID) file |
Critical Number Running Maximum |
Critical Number Running Minimum |

Table C-72. RHN Satellite Server::Process Running settings

## C.10.11. RHN Satellite Server::Swap

The RHN Satellite Server::Swap probe monitors the percent of free swap space available on a Satellite. A CRITICAL status results if the value falls below the Critical threshold. A WARNING status results if the value falls below the Warning threshold.

Field | Value
--- | ---
Critical Minimum Swap Percent Free |
Warning Minimum Swap Percent Free |

Table C-73. RHN Satellite Server::Swap settings

## C.10.12. RHN Satellite Server::Users

The RHN Satellite Server::Users probe monitors the number of users currently logged into a Satellite. A CRITICAL status results if the value exceeds the Critical threshold. A WARNING status results if the value exceeds the Warning threshold.

Field | Value
--- | ---
Critical Maximum Users |
Warning Maximum Users |

Table C-74. RHN Satellite Server::Users settings

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