lag.php
No OneTemporary
Actions

Size

1 KB

Referenced Files

None

Subscribers

None

lag.php
View Options

	<?php
	/**
	* Shows database lag
	*
	* @license GPL-2.0-or-later
	* @file
	* @ingroup Maintenance
	*/

	use MediaWiki\Maintenance\Maintenance;

	// @codeCoverageIgnoreStart
	require_once __DIR__ . '/Maintenance.php';
	// @codeCoverageIgnoreEnd

	/**
	* Maintenance script to show database lag.
	*
	* @ingroup Maintenance
	*/
	class DatabaseLag extends Maintenance {

	/** @var bool */
	protected $stopReporting = false;

	public function __construct() {
	parent::__construct();
	$this->addDescription( 'Shows database lag' );
	$this->addOption( 'r', "Don't exit immediately, but show the lag every 5 seconds" );
	}

	public function execute() {
	$lb = $this->getServiceContainer()->getDBLoadBalancer();
	if ( $this->hasOption( 'r' ) ) {
	$this->output( 'time ' );

	$serverCount = $lb->getServerCount();
	for ( $i = 1; $i < $serverCount; $i++ ) {
	$hostname = $lb->getServerName( $i );
	$this->output( sprintf( "%-12s ", $hostname ) );
	}
	$this->output( "\n" );

	do {
	$lags = $lb->getLagTimes();
	unset( $lags[0] );
	$this->output( gmdate( 'H:i:s' ) . ' ' );
	foreach ( $lags as $lag ) {
	$this->output(
	sprintf(
	"%-12s ",
	$lag === false ? 'replication stopped or errored' : $lag
	)
	);
	}
	$this->output( "\n" );
	sleep( 5 );
	} while ( !$this->stopReporting );

	} else {
	$lags = $lb->getLagTimes();
	foreach ( $lags as $i => $lag ) {
	$name = $lb->getServerName( $i );
	$this->output(
	sprintf(
	"%-20s %s\n",
	$name,
	$lag === false ? 'replication stopped or errored' : $lag
	)
	);
	}
	}
	}
	}

	// @codeCoverageIgnoreStart
	$maintClass = DatabaseLag::class;
	require_once RUN_MAINTENANCE_IF_MAIN;
	// @codeCoverageIgnoreEnd