clearCacheStats.php

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

class ClearCacheStats extends Maintenance {

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

    public function execute() {
        global $wgLocalDatabases, $wgMemc;
        foreach ( $wgLocalDatabases as $db ) {
            $wgMemc->delete( "$db:stats:request_with_session" );
            $wgMemc->delete( "$db:stats:request_without_session" );
            $wgMemc->delete( "$db:stats:pcache_hit" );
            $wgMemc->delete( "$db:stats:pcache_miss_expired" );
            $wgMemc->delete( "$db:stats:pcache_miss_absent" );
            $wgMemc->delete( "$db:stats:pcache_miss_stub" );
            $wgMemc->delete( "$db:stats:image_cache_hit" );
            $wgMemc->delete( "$db:stats:image_cache_miss" );
            $wgMemc->delete( "$db:stats:image_cache_update" );
            $wgMemc->delete( "$db:stats:diff_cache_hit" );
            $wgMemc->delete( "$db:stats:diff_cache_miss" );
            $wgMemc->delete( "$db:stats:diff_uncacheable" );
            $wgMemc->delete( "$db:stats:job-insert" );
            $wgMemc->delete( "$db:stats:job-pop" );
        }
    }
}

$maintClass = "ClearCacheStats";
require_once RUN_MAINTENANCE_IF_MAIN;