maintenance/lag.php

   1 <?php
   2 /**
   3  * Shows database lag
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Maintenance
  22  */
  23
  24 require_once __DIR__ . '/Maintenance.php';
  25
  26 /**
  27  * Maintenance script to show database lag.
  28  *
  29  * @ingroup Maintenance
  30  */
  31 class DatabaseLag extends Maintenance {
  32         public function __construct() {
  33                 parent::__construct();
  34                 $this->mDescription = "Shows database lag";
  35                 $this->addOption( 'r', "Don't exit immediately, but show the lag every 5 seconds" );
  36         }
  37
  38         public function execute() {
  39                 if ( $this->hasOption( 'r' ) ) {
  40                         $lb = wfGetLB();
  41                         echo 'time     ';
  42                         for ( $i = 1; $i < $lb->getServerCount(); $i++ ) {
  43                                 $hostname = $lb->getServerName( $i );
  44                                 printf( "%-12s ", $hostname );
  45                         }
  46                         echo "\n";
  47
  48                         while ( 1 ) {
  49                                 $lb->clearLagTimeCache();
  50                                 $lags = $lb->getLagTimes();
  51                                 unset( $lags[0] );
  52                                 echo gmdate( 'H:i:s' ) . ' ';
  53                                 foreach ( $lags as $lag ) {
  54                                         printf( "%-12s ", $lag === false ? 'false' : $lag );
  55                                 }
  56                                 echo "\n";
  57                                 sleep( 5 );
  58                         }
  59                 } else {
  60                         $lb = wfGetLB();
  61                         $lags = $lb->getLagTimes();
  62                         foreach ( $lags as $i => $lag ) {
  63                                 $name = $lb->getServerName( $i );
  64                                 $this->output( sprintf( "%-20s %s\n", $name, $lag === false ? 'false' : $lag ) );
  65                         }
  66                 }
  67         }
  68 }
  69
  70 $maintClass = "DatabaseLag";
  71 require_once RUN_MAINTENANCE_IF_MAIN;