Ошибка 500 в zoo - ZOO

500 - DatabaseHelper::query failed. (Out of memory (Needed 19660772 bytes) SQL=SELECT c.*, GROUP_CONCAT(DISTINCT i.id) as item_ids FROM guide_zoo_category as c USE INDEX (APPLICATIONID_ID_INDEX) LEFT JOIN guide_zoo_category_item as ci ON ci.category_id = c.id LEFT JOIN guide_zoo_item AS i USE INDEX (MULTI_INDEX2) ON ci.item_id = i.id AND i.access <= 0 AND i.state = 1 AND (i.publish_up = '0000-00-00 00:00:00' OR i.publish_up <= '2013-01-07 00:23:29') AND (i.publish_down = '0000-00-00 00:00:00' OR i.publish_down >= '2013-01-07 00:23:29') WHERE c.application_id = 2 AND c.published = 1 GROUP BY c.id)

Out of memory

Памяти php не хватает