gnu-social/plugins/SQLStats/SQLStatsPlugin.php

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<?php
/*
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2011, 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 SQLStatsPlugin
* @maintainer Evan Prodromou <evan@status.net>
*/
class SQLStatsPlugin extends Plugin
{
protected $queryCount = 0;
protected $queryStart = 0;
protected $queryTimes = array();
protected $queries = array();
function onPluginVersion(array &$versions)
{
$versions[] = array('name' => 'SQLStats',
'version' => GNUSOCIAL_VERSION,
'author' => 'Evan Prodromou',
'homepage' => 'http://status.net/wiki/Plugin:SQLStats',
'rawdescription' =>
// TRANS: Plugin decription.
_m('Debug tool to watch for poorly indexed DB queries.'));
return true;
}
function onStartDBQuery($obj, $query, &$result)
{
$this->queryStart = microtime(true);
return true;
}
function onEndDBQuery($obj, $query, &$result)
{
$endTime = microtime(true);
$this->queryTimes[] = round(($endTime - $this->queryStart) * 1000);
$this->queries[] = trim(preg_replace('/\s/', ' ', $query));
$this->queryStart = 0;
return true;
}
function cleanup()
{
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if (count($this->queryTimes) == 0) {
$this->log(LOG_INFO, sprintf('0 queries this hit.'));
} else {
$this->log(LOG_INFO, sprintf('%d queries this hit (total = %d, avg = %d, max = %d, min = %d)',
count($this->queryTimes),
array_sum($this->queryTimes),
array_sum($this->queryTimes)/count($this->queryTimes),
max($this->queryTimes),
min($this->queryTimes)));
}
$verbose = common_config('sqlstats', 'verbose');
if ($verbose) {
foreach ($this->queries as $query) {
$this->log(LOG_INFO, $query);
}
}
}
}