Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 4932 bytes) in <b>/home/xxxxxxxx/public_html/ow_core/database.php</b> on line 342 

line 342 is

 $result = $stmt->fetchAll(PDO::FETCH_CLASS, $className);

 what cache is this trying to call db cache ?? its in this

    public function queryForObjectList( $sql, $className, array $params = null, $cacheLifeTime = 0, $tags = array() )    {        $dataFromCache = $this->getFromCache($sql, $params, $cacheLifeTime);
        if ( $dataFromCache !== self::NO_CACHE_ENTRY )        {            return $dataFromCache;        }
        $stmt = $this->execute($sql, $params);     

   $result = $stmt->fetchAll(PDO::FETCH_CLASS, $className);