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<?php
/**
* Shows database lag
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup Maintenance
*/
require_once( __DIR__ . '/Maintenance.php' );
/**
* Maintenance script to show database lag.
*
* @ingroup Maintenance
*/
class DatabaseLag extends Maintenance {
public function __construct() {
parent::__construct();
$this->mDescription = "Shows database lag";
$this->addOption( 'r', "Don't exit immediately, but show the lag every 5 seconds" );
}
public function execute() {
if ( $this->hasOption( 'r' ) ) {
$lb = wfGetLB();
echo 'time ';
for ( $i = 1; $i < $lb->getServerCount(); $i++ ) {
$hostname = $lb->getServerName( $i );
printf( "%-12s ", $hostname );
}
echo "\n";
while ( 1 ) {
$lb->clearLagTimeCache();
$lags = $lb->getLagTimes();
unset( $lags[0] );
echo gmdate( 'H:i:s' ) . ' ';
foreach ( $lags as $lag ) {
printf( "%-12s " , $lag === false ? 'false' : $lag );
}
echo "\n";
sleep( 5 );
}
} else {
$lb = wfGetLB();
$lags = $lb->getLagTimes();
foreach ( $lags as $i => $lag ) {
$name = $lb->getServerName( $i );
$this->output( sprintf( "%-20s %s\n" , $name, $lag === false ? 'false' : $lag ) );
}
}
}
}
$maintClass = "DatabaseLag";
require_once( RUN_MAINTENANCE_IF_MAIN );
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