1 files changed, 72 insertions, 0 deletions
diff --git a/www/wiki/maintenance/lag.php b/www/wiki/maintenance/lag.php
new file mode 100644
index 00000000..f041e15c
--- /dev/null
+++ b/www/wiki/maintenance/lag.php
@@ -0,0 +1,72 @@
+<?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->addDescription( '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     ';
+
+			$serverCount = $lb->getServerCount();
+			for ( $i = 1; $i < $serverCount; $i++ ) {
+				$hostname = $lb->getServerName( $i );
+				printf( "%-12s ", $hostname );
+			}
+			echo "\n";
+
+			while ( 1 ) {
+				$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::class;
+require_once RUN_MAINTENANCE_IF_MAIN;