$srcRes = $this->dbw->select( $srcTable, '*', $conds, __METHOD__,
array( 'LIMIT' => $batchSize, 'ORDER BY' => 'log_timestamp' ) );
$srcRes = $this->dbw->select( $srcTable, '*', $conds, __METHOD__,
array( 'LIMIT' => $batchSize, 'ORDER BY' => 'log_timestamp' ) );