includes/profiler/ProfilerSimpleDB.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 /**
  25  * $wgProfiler['class'] = 'ProfilerSimpleDB';
  26  *
  27  * @ingroup Profiler
  28  */
  29 class ProfilerSimpleDB extends ProfilerStandard {
  30         public function isPersistent() {
  31                 return true;
  32         }
  33
  34         /**
  35          * Log the whole profiling data into the database.
  36          */
  37         public function logData() {
  38                 global $wgProfilePerHost;
  39
  40                 # Do not log anything if database is readonly (bug 5375)
  41                 if ( wfReadOnly() ) {
  42                         return;
  43                 }
  44
  45                 if ( $wgProfilePerHost ) {
  46                         $pfhost = wfHostname();
  47                 } else {
  48                         $pfhost = '';
  49                 }
  50
  51                 try {
  52                         $this->collateData();
  53
  54                         $dbw = wfGetDB( DB_MASTER );
  55                         $useTrx = ( $dbw->getType() === 'sqlite' ); // much faster
  56                         if ( $useTrx ) {
  57                                 $dbw->startAtomic( __METHOD__ );
  58                         }
  59                         foreach ( $this->mCollated as $name => $data ) {
  60                                 $eventCount = $data['count'];
  61                                 $timeSum = (float)( $data['real'] * 1000 );
  62                                 $memorySum = (float)$data['memory'];
  63                                 $name = substr( $name, 0, 255 );
  64
  65                                 // Kludge
  66                                 $timeSum = $timeSum >= 0 ? $timeSum : 0;
  67                                 $memorySum = $memorySum >= 0 ? $memorySum : 0;
  68
  69                                 $dbw->update( 'profiling',
  70                                         array(
  71                                                 "pf_count=pf_count+{$eventCount}",
  72                                                 "pf_time=pf_time+{$timeSum}",
  73                                                 "pf_memory=pf_memory+{$memorySum}",
  74                                         ),
  75                                         array(
  76                                                 'pf_name' => $name,
  77                                                 'pf_server' => $pfhost,
  78                                         ),
  79                                         __METHOD__ );
  80
  81                                 $rc = $dbw->affectedRows();
  82                                 if ( $rc == 0 ) {
  83                                         $dbw->insert( 'profiling',
  84                                                 array(
  85                                                         'pf_name' => $name,
  86                                                         'pf_count' => $eventCount,
  87                                                         'pf_time' => $timeSum,
  88                                                         'pf_memory' => $memorySum,
  89                                                         'pf_server' => $pfhost
  90                                                 ),
  91                                                 __METHOD__,
  92                                                 array( 'IGNORE' )
  93                                         );
  94                                 }
  95                                 // When we upgrade to mysql 4.1, the insert+update
  96                                 // can be merged into just a insert with this construct added:
  97                                 //     "ON DUPLICATE KEY UPDATE ".
  98                                 //     "pf_count=pf_count + VALUES(pf_count), ".
  99                                 //     "pf_time=pf_time + VALUES(pf_time)";
 100                         }
 101                         if ( $useTrx ) {
 102                                 $dbw->endAtomic( __METHOD__ );
 103                         }
 104                 } catch ( DBError $e ) {
 105                 }
 106         }
 107 }