MySQL server has gone away SQL query : select count(*) from SS_products AS pt LEFT JOIN SS_product_options_values AS po ON pt.productID=po.productID and po.optionID=36 where  enabled=1 AND categoryID=9821 OR  enabled=1 AND categoryID=8797 OR  enabled=1 AND categoryID=9873 OR  enabled=1 AND categoryID=9569 OR  enabled=1 AND categoryID=8796 OR  enabled=1 AND categoryID=8799 OR  enabled=1 AND categoryID=8800 OR  enabled=1 AND categoryID=8801 OR  enabled=1 AND categoryID=8802 OR  enabled=1 AND categoryID=9815 OR  enabled=1 AND categoryID=8804 OR  enabled=1 AND categoryID=8803 OR  enabled=1 AND categoryID=8805 OR  enabled=1 AND categoryID=8806 OR  enabled=1 AND categoryID=8807 OR  enabled=1 AND categoryID=9863 OR  enabled=1 AND categoryID=8808 OR  enabled=1 AND categoryID=8809 OR  enabled=1 AND categoryID=8810 OR  enabled=1 AND categoryID=8811 OR  enabled=1 AND categoryID=6611 order by  in_stock DESC, Price, name