showCacheStats.php

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<?php
require_once __DIR__ . '/Maintenance.php';

class ShowCacheStats extends Maintenance {

    public function __construct() {
        $this->mDescription = "Show statistics from the cache";
        parent::__construct();
    }

    public function getDbType() {
        return Maintenance::DB_NONE;
    }

    public function execute() {
        global $wgMemc;

        // Can't do stats if
        if ( get_class( $wgMemc ) == 'EmptyBagOStuff' ) {
            $this->error( "You are running EmptyBagOStuff, I can not provide any statistics.", true );
        }

        $this->output( "\nParser cache\n" );
        $hits = intval( $wgMemc->get( wfMemcKey( 'stats', 'pcache_hit' ) ) );
        $expired = intval( $wgMemc->get( wfMemcKey( 'stats', 'pcache_miss_expired' ) ) );
        $absent = intval( $wgMemc->get( wfMemcKey( 'stats', 'pcache_miss_absent' ) ) );
        $stub = intval( $wgMemc->get( wfMemcKey( 'stats', 'pcache_miss_stub' ) ) );
        $total = $hits + $expired + $absent + $stub;
        if ( $total ) {
            $this->output( sprintf( "hits:              %-10d %6.2f%%\n", $hits, $hits / $total * 100 ) );
            $this->output( sprintf( "expired:           %-10d %6.2f%%\n", $expired, $expired / $total * 100 ) );
            $this->output( sprintf( "absent:            %-10d %6.2f%%\n", $absent, $absent / $total * 100 ) );
            $this->output( sprintf( "stub threshold:    %-10d %6.2f%%\n", $stub, $stub / $total * 100 ) );
            $this->output( sprintf( "total:             %-10d %6.2f%%\n", $total, 100 ) );
        } else {
            $this->output( "no statistics available\n" );
        }

        $this->output( "\nImage cache\n" );
        $hits = intval( $wgMemc->get( wfMemcKey( 'stats', 'image_cache_hit' ) ) );
        $misses = intval( $wgMemc->get( wfMemcKey( 'stats', 'image_cache_miss' ) ) );
        $updates = intval( $wgMemc->get( wfMemcKey( 'stats', 'image_cache_update' ) ) );
        $total = $hits + $misses;
        if ( $total ) {
            $this->output( sprintf( "hits:              %-10d %6.2f%%\n", $hits, $hits / $total * 100 ) );
            $this->output( sprintf( "misses:            %-10d %6.2f%%\n", $misses, $misses / $total * 100 ) );
            $this->output( sprintf( "updates:           %-10d\n", $updates ) );
        } else {
            $this->output( "no statistics available\n" );
        }

        $this->output( "\nDiff cache\n" );
        $hits = intval( $wgMemc->get( wfMemcKey( 'stats', 'diff_cache_hit' ) ) );
        $misses = intval( $wgMemc->get( wfMemcKey( 'stats', 'diff_cache_miss' ) ) );
        $uncacheable = intval( $wgMemc->get( wfMemcKey( 'stats', 'diff_uncacheable' ) ) );
        $total = $hits + $misses + $uncacheable;
        if ( $total ) {
            $this->output( sprintf( "hits:              %-10d %6.2f%%\n", $hits, $hits / $total * 100 ) );
            $this->output( sprintf( "misses:            %-10d %6.2f%%\n", $misses, $misses / $total * 100 ) );
            $this->output( sprintf( "uncacheable:       %-10d %6.2f%%\n", $uncacheable, $uncacheable / $total * 100 ) );
        } else {
            $this->output( "no statistics available\n" );
        }
    }
}

$maintClass = "ShowCacheStats";
require_once RUN_MAINTENANCE_IF_MAIN;