<?php /* * StatusNet - the distributed open-source microblogging tool * Copyright (C) 2010, StatusNet, Inc. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published by * the Free Software Foundation, either version 3 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ if (!defined('STATUSNET')) { exit(1); } /** * Check DB queries for filesorts and such and log em. * * @package SQLProfilePlugin * @maintainer Brion Vibber <brion@status.net> */ class SQLProfilePlugin extends Plugin { private $recursionGuard = false; function onPluginVersion(array &$versions) { $versions[] = array('name' => 'SQLProfile', 'version' => GNUSOCIAL_VERSION, 'author' => 'Brion Vibber', 'homepage' => 'http://status.net/wiki/Plugin:SQLProfile', 'rawdescription' => // TRANS: Plugin description. _m('Debug tool to watch for poorly indexed DB queries.')); return true; } function onStartDBQuery($obj, $query, &$result) { if (!$this->recursionGuard && preg_match('/\bselect\b/i', $query)) { $this->recursionGuard = true; $xobj = clone($obj); $explain = $xobj->query('EXPLAIN ' . $query); $this->recursionGuard = false; while ($xobj->fetch()) { $extra = $xobj->Extra; $evil = (strpos($extra, 'Using filesort') !== false) || (strpos($extra, 'Using temporary') !== false); if ($evil) { $xquery = $xobj->sanitizeQuery($query); common_log(LOG_DEBUG, "$extra | $xquery"); } } } return true; } }