forked from GNUsocial/gnu-social
68 lines
2.3 KiB
PHP
68 lines
2.3 KiB
PHP
<?php
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/*
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* StatusNet - the distributed open-source microblogging tool
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* Copyright (C) 2010, StatusNet, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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if (!defined('STATUSNET')) {
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exit(1);
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}
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/**
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* Check DB queries for filesorts and such and log em.
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*
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* @package SQLProfilePlugin
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* @maintainer Brion Vibber <brion@status.net>
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*/
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class SQLProfilePlugin extends Plugin
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{
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private $recursionGuard = false;
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function onPluginVersion(&$versions)
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{
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$versions[] = array('name' => 'SQLProfile',
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'version' => STATUSNET_VERSION,
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'author' => 'Brion Vibber',
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'homepage' => 'http://status.net/wiki/Plugin:SQLProfile',
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'rawdescription' =>
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// TRANS: Plugin description.
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_m('Debug tool to watch for poorly indexed DB queries.'));
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return true;
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}
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function onStartDBQuery($obj, $query, &$result)
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{
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if (!$this->recursionGuard && preg_match('/\bselect\b/i', $query)) {
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$this->recursionGuard = true;
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$xobj = clone($obj);
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$explain = $xobj->query('EXPLAIN ' . $query);
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$this->recursionGuard = false;
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while ($xobj->fetch()) {
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$extra = $xobj->Extra;
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$evil = (strpos($extra, 'Using filesort') !== false) ||
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(strpos($extra, 'Using temporary') !== false);
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if ($evil) {
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$xquery = $xobj->sanitizeQuery($query);
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common_log(LOG_DEBUG, "$extra | $xquery");
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}
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}
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}
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return true;
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}
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}
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