initEditCount.php

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<?php
require_once( dirname( __FILE__ ) . '/Maintenance.php' );

class InitEditCount extends Maintenance {
        public function __construct() {
                parent::__construct();
                $this->addOption( 'quick', 'Force the update to be done in a single query' );
                $this->addOption( 'background', 'Force replication-friendly mode; may be inefficient but
                avoids locking tables or lagging slaves with large updates;
                calculates counts on a slave if possible.

Background mode will be automatically used if the server is MySQL 4.0
(which does not support subqueries) or if multiple servers are listed
in the load balancer, usually indicating a replication environment.' );
                $this->mDescription = "Batch-recalculate user_editcount fields from the revision table";
        }

        public function execute() {
                $dbw = wfGetDB( DB_MASTER );
                $user = $dbw->tableName( 'user' );
                $revision = $dbw->tableName( 'revision' );

                $dbver = $dbw->getServerVersion();

                // Autodetect mode...
                $backgroundMode = wfGetLB()->getServerCount() > 1 ||
                        ( $dbw instanceof DatabaseMysql && version_compare( $dbver, '4.1' ) < 0 );

                if ( $this->hasOption( 'background' ) ) {
                        $backgroundMode = true;
                } elseif ( $this->hasOption( 'quick' ) ) {
                        $backgroundMode = false;
                }

                if ( $backgroundMode ) {
                        $this->output( "Using replication-friendly background mode...\n" );

                        $dbr = wfGetDB( DB_SLAVE );
                        $chunkSize = 100;
                        $lastUser = $dbr->selectField( 'user', 'MAX(user_id)', '', __METHOD__ );

                        $start = microtime( true );
                        $migrated = 0;
                        for ( $min = 0; $min <= $lastUser; $min += $chunkSize ) {
                                $max = $min + $chunkSize;
                                $result = $dbr->query(
                                        "SELECT
                                                user_id,
                                                COUNT(rev_user) AS user_editcount
                                        FROM $user
                                        LEFT OUTER JOIN $revision ON user_id=rev_user
                                        WHERE user_id > $min AND user_id <= $max
                                        GROUP BY user_id",
                                        __METHOD__ );

                                foreach ( $result as $row ) {
                                        $dbw->update( 'user',
                                                array( 'user_editcount' => $row->user_editcount ),
                                                array( 'user_id' => $row->user_id ),
                                                __METHOD__ );
                                        ++$migrated;
                                }

                                $delta = microtime( true ) - $start;
                                $rate = ( $delta == 0.0 ) ? 0.0 : $migrated / $delta;
                                $this->output( sprintf( "%s %d (%0.1f%%) done in %0.1f secs (%0.3f accounts/sec).\n",
                                        wfWikiID(),
                                        $migrated,
                                        min( $max, $lastUser ) / $lastUser * 100.0,
                                        $delta,
                                        $rate ) );

                                wfWaitForSlaves();
                        }
                } else {
                        // Subselect should work on modern MySQLs etc
                        $this->output( "Using single-query mode...\n" );
                        $sql = "UPDATE $user SET user_editcount=(SELECT COUNT(*) FROM $revision WHERE rev_user=user_id)";
                        $dbw->query( $sql );
                }

                $this->output( "Done!\n" );
        }
}

$maintClass = "InitEditCount";
require_once( RUN_MAINTENANCE_IF_MAIN );