maintenance/lag.php

   1 <?php
   2
   3 /**
   4  * Shows database lag
   5  *
   6  * @ingroup Maintenance
   7  */
   8
   9 require_once( dirname( __FILE__ ) . '/Maintenance.php' );
  10
  11 class DatabaseLag extends Maintenance {
  12         public function __construct() {
  13                 parent::__construct();
  14                 $this->mDescription = "Shows database lag";
  15                 $this->addOption( 'r', "Don't exit immediately, but show the lag every 5 seconds" );
  16         }
  17
  18         public function execute() {
  19                 if ( $this->hasOption( 'r' ) ) {
  20                         $lb = wfGetLB();
  21                         echo 'time     ';
  22                         for ( $i = 1; $i < $lb->getServerCount(); $i++ ) {
  23                                 $hostname = $lb->getServerName( $i );
  24                                 printf( "%-12s ", $hostname );
  25                         }
  26                         echo "\n";
  27
  28                         while ( 1 ) {
  29                                 $lb->clearLagTimeCache();
  30                                 $lags = $lb->getLagTimes();
  31                                 unset( $lags[0] );
  32                                 echo gmdate( 'H:i:s' ) . ' ';
  33                                 foreach ( $lags as $i => $lag ) {
  34                                         printf( "%-12s " , $lag === false ? 'false' : $lag );
  35                                 }
  36                                 echo "\n";
  37                                 sleep( 5 );
  38                         }
  39                 } else {
  40                         $lb = wfGetLB();
  41                         $lags = $lb->getLagTimes();
  42                         foreach ( $lags as $i => $lag ) {
  43                                 $name = $lb->getServerName( $i );
  44                                 $this->output( sprintf( "%-20s %s\n" , $name, $lag === false ? 'false' : $lag ) );
  45                         }
  46                 }
  47         }
  48 }
  49
  50 $maintClass = "DatabaseLag";
  51 require_once( DO_MAINTENANCE );