maintenance/initEditCount.php

   1 <?php
   2 /**
   3  * Init the user_editcount database field based on the number of rows in the
   4  * revision table.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19  * http://www.gnu.org/copyleft/gpl.html
  20  *
  21  * @file
  22  * @ingroup Maintenance
  23  */
  24
  25 require_once __DIR__ . '/Maintenance.php';
  26
  27 class InitEditCount extends Maintenance {
  28         public function __construct() {
  29                 parent::__construct();
  30                 $this->addOption( 'quick', 'Force the update to be done in a single query' );
  31                 $this->addOption( 'background', 'Force replication-friendly mode; may be inefficient but
  32                 avoids locking tables or lagging replica DBs with large updates;
  33                 calculates counts on a replica DB if possible.
  34
  35 Background mode will be automatically used if multiple servers are listed
  36 in the load balancer, usually indicating a replication environment.' );
  37                 $this->addDescription( 'Batch-recalculate user_editcount fields from the revision table' );
  38         }
  39
  40         public function execute() {
  41                 $dbw = $this->getDB( DB_MASTER );
  42                 $user = $dbw->tableName( 'user' );
  43                 $revision = $dbw->tableName( 'revision' );
  44
  45                 // Autodetect mode...
  46                 if ( $this->hasOption( 'background' ) ) {
  47                         $backgroundMode = true;
  48                 } elseif ( $this->hasOption( 'quick' ) ) {
  49                         $backgroundMode = false;
  50                 } else {
  51                         $backgroundMode = wfGetLB()->getServerCount() > 1;
  52                 }
  53
  54                 if ( $backgroundMode ) {
  55                         $this->output( "Using replication-friendly background mode...\n" );
  56
  57                         $dbr = $this->getDB( DB_REPLICA );
  58                         $chunkSize = 100;
  59                         $lastUser = $dbr->selectField( 'user', 'MAX(user_id)', '', __METHOD__ );
  60
  61                         $start = microtime( true );
  62                         $migrated = 0;
  63                         for ( $min = 0; $min <= $lastUser; $min += $chunkSize ) {
  64                                 $max = $min + $chunkSize;
  65                                 $result = $dbr->query(
  66                                         "SELECT
  67                                                 user_id,
  68                                                 COUNT(rev_user) AS user_editcount
  69                                         FROM $user
  70                                         LEFT OUTER JOIN $revision ON user_id=rev_user
  71                                         WHERE user_id > $min AND user_id <= $max
  72                                         GROUP BY user_id",
  73                                         __METHOD__ );
  74
  75                                 foreach ( $result as $row ) {
  76                                         $dbw->update( 'user',
  77                                                 [ 'user_editcount' => $row->user_editcount ],
  78                                                 [ 'user_id' => $row->user_id ],
  79                                                 __METHOD__ );
  80                                         ++$migrated;
  81                                 }
  82
  83                                 $delta = microtime( true ) - $start;
  84                                 $rate = ( $delta == 0.0 ) ? 0.0 : $migrated / $delta;
  85                                 $this->output( sprintf( "%s %d (%0.1f%%) done in %0.1f secs (%0.3f accounts/sec).\n",
  86                                         wfWikiID(),
  87                                         $migrated,
  88                                         min( $max, $lastUser ) / $lastUser * 100.0,
  89                                         $delta,
  90                                         $rate ) );
  91
  92                                 wfWaitForSlaves();
  93                         }
  94                 } else {
  95                         $this->output( "Using single-query mode...\n" );
  96                         $sql = "UPDATE $user SET user_editcount=(SELECT COUNT(*) FROM $revision WHERE rev_user=user_id)";
  97                         $dbw->query( $sql );
  98                 }
  99
 100                 $this->output( "Done!\n" );
 101         }
 102 }
 103
 104 $maintClass = "InitEditCount";
 105 require_once RUN_MAINTENANCE_IF_MAIN;