clear_stats.php

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

class clear_stats 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 = "clear_stats";
require_once( RUN_MAINTENANCE_IF_MAIN );