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( dirname( __FILE__ ) . '/Maintenance.php' );
  25
  26 class DatabaseLag extends Maintenance {
  27         public function __construct() {
  28                 parent::__construct();
  29                 $this->mDescription = "Shows database lag";
  30                 $this->addOption( 'r', "Don't exit immediately, but show the lag every 5 seconds" );
  31         }
  32
  33         public function execute() {
  34                 if ( $this->hasOption( 'r' ) ) {
  35                         $lb = wfGetLB();
  36                         echo 'time     ';
  37                         for ( $i = 1; $i < $lb->getServerCount(); $i++ ) {
  38                                 $hostname = $lb->getServerName( $i );
  39                                 printf( "%-12s ", $hostname );
  40                         }
  41                         echo "\n";
  42
  43                         while ( 1 ) {
  44                                 $lb->clearLagTimeCache();
  45                                 $lags = $lb->getLagTimes();
  46                                 unset( $lags[0] );
  47                                 echo gmdate( 'H:i:s' ) . ' ';
  48                                 foreach ( $lags as $lag ) {
  49                                         printf( "%-12s " , $lag === false ? 'false' : $lag );
  50                                 }
  51                                 echo "\n";
  52                                 sleep( 5 );
  53                         }
  54                 } else {
  55                         $lb = wfGetLB();
  56                         $lags = $lb->getLagTimes();
  57                         foreach ( $lags as $i => $lag ) {
  58                                 $name = $lb->getServerName( $i );
  59                                 $this->output( sprintf( "%-20s %s\n" , $name, $lag === false ? 'false' : $lag ) );
  60                         }
  61                 }
  62         }
  63 }
  64
  65 $maintClass = "DatabaseLag";
  66 require_once( DO_MAINTENANCE );