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Pomoc w odnalezieniu błędu


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Czesc. Dostałem informację od firmy hostingowej, że Problem z zapytaniem do bazy danych, który powoduje 100% użycia CPU na serwerze MySQL powraca.

Czy może mi ktoś podpowiedzieć gdzie może leżeć problem ? 

Zapytanie które powoduje błąd to :

 

SELECT COUNT(DISTINCT p.id_product) c FROM (SELECT p.id_product, p.id_manufacturer, SUM(sa.quantity) as quantity, p.condition, p.weight, p.price, psales.quantity as sales, cp.position FROM ps_product p LEFT JOIN ps_product_attribute pa ON (p.id_product = pa.id_product) LEFT JOIN ps_product_attribute_combination pac ON (pa.id_product_attribute = pac.id_product_attribute) LEFT JOIN ps_stock_available sa ON (p.id_product = sa.id_product AND IFNULL(pac.id_product_attribute, 0) = sa.id_product_attribute AND sa.id_shop = 1 AND sa.id_shop_group = 0 ) LEFT JOIN ps_product_sale psales ON (psales.id_product = p.id_product) INNER JOIN ps_category_product cp ON (p.id_product = cp.id_product) INNER JOIN ps_category c ON (cp.id_category = c.id_category AND c.active=1) INNER JOIN ps_product_shop ps ON (p.id_product = ps.id_product AND ps.id_shop = 1 AND ps.active = TRUE) WHERE p.visibility IN ('both', 'catalog') AND c.nleft>=353 AND c.nright<=386 AND ps.id_shop='1' GROUP BY p.id_product) p LEFT JOIN ps_product_attribute pa ON (p.id_product = pa.id_product) LEFT JOIN ps_product_attribute_combination pac ON (pa.id_product_attribute = pac.id_product_attribute) LEFT JOIN ps_stock_available sa ON (p.id_product = sa.id_product AND IFNULL(pac.id_product_attribute, 0) = sa.id_product_attribute AND sa.id_shop = 1 AND sa.id_shop_group = 0 ) LEFT JOIN ps_stock_available sa_1 ON (p.id_product = sa_1.id_product AND IFNULL(pac.id_product_attribute, 0) = sa_1.id_product_attribute AND sa_1.id_shop = 1 AND sa_1.id_shop_group = 0 ) WHERE ((sa.quantity<=0 AND sa_1.out_of_stock IN (0, 2)))

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