includes/profiler/output/ProfilerOutputDb.php

   1 <?php
   2 /**
   3  * Profiler storing information in the DB.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Profiler
  22  */
  23
  24 use Wikimedia\Rdbms\DBError;
  25
  26 /**
  27  * Logs profiling data into the local DB
  28  *
  29  * @ingroup Profiler
  30  * @since 1.25
  31  */
  32 class ProfilerOutputDb extends ProfilerOutput {
  33         /** @var bool Whether to store host data with profiling calls */
  34         private $perHost = false;
  35
  36         public function __construct( Profiler $collector, array $params ) {
  37                 parent::__construct( $collector, $params );
  38
  39                 // Initialize per-host profiling from config, back-compat if available
  40                 if ( isset( $this->params['perHost'] ) ) {
  41                         $this->perHost = $this->params['perHost'];
  42                 }
  43         }
  44
  45         public function canUse() {
  46                 # Do not log anything if database is readonly (T7375)
  47                 return !wfReadOnly();
  48         }
  49
  50         public function log( array $stats ) {
  51                 try {
  52                         $dbw = wfGetDB( DB_MASTER );
  53                 } catch ( DBError $e ) {
  54                         return; // ignore
  55                 }
  56
  57                 $fname = __METHOD__;
  58                 $dbw->onTransactionCommitOrIdle( function () use ( $stats, $fname, $dbw ) {
  59                         $pfhost = $this->perHost ? wfHostname() : '';
  60                         // Sqlite: avoid excess b-tree rebuilds (mostly for non-WAL mode)
  61                         // non-Sqlite: lower contention with small transactions
  62                         $useTrx = ( $dbw->getType() === 'sqlite' );
  63
  64                         try {
  65                                 $useTrx ? $dbw->startAtomic( $fname ) : null;
  66
  67                                 foreach ( $stats as $data ) {
  68                                         $name = $data['name'];
  69                                         $eventCount = $data['calls'];
  70                                         $timeSum = (float)$data['real'];
  71                                         $memorySum = (float)$data['memory'];
  72                                         $name = substr( $name, 0, 255 );
  73
  74                                         // Kludge
  75                                         $timeSum = $timeSum >= 0 ? $timeSum : 0;
  76                                         $memorySum = $memorySum >= 0 ? $memorySum : 0;
  77
  78                                         $dbw->upsert( 'profiling',
  79                                                 [
  80                                                         'pf_name' => $name,
  81                                                         'pf_count' => $eventCount,
  82                                                         'pf_time' => $timeSum,
  83                                                         'pf_memory' => $memorySum,
  84                                                         'pf_server' => $pfhost
  85                                                 ],
  86                                                 [ [ 'pf_name', 'pf_server' ] ],
  87                                                 [
  88                                                         "pf_count=pf_count+{$eventCount}",
  89                                                         "pf_time=pf_time+{$timeSum}",
  90                                                         "pf_memory=pf_memory+{$memorySum}",
  91                                                 ],
  92                                                 $fname
  93                                         );
  94                                 }
  95                         } catch ( DBError $e ) {
  96                                 // ignore
  97                         }
  98
  99                         try {
 100                                 $useTrx ? $dbw->endAtomic( $fname ) : null;
 101                         } catch ( DBError $e ) {
 102                                 // ignore
 103                         }
 104                 } );
 105         }
 106 }