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mysql-slow.log


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Bonjour,
J'ai un serveur qui a plante plusieurs fois. le suuport m'a envoye le mysql-slow.log en me disant:

Voici la liste des requêtes MySQL mal codées (longues, manque d'index ...)
et la je vois plusieurs requete de prestashop qui y sont reference.

Enquoi se style de requete peut faire plante un serveur?
Je ne comprend pas trop ce log, si quelqu'un pouvait meclairer se serait sympa.

# Time: 110117 14:43:47
# User@Host: XXXXXXXXXXX @ localhost []
# Query_time: 14  Lock_time: 8  Rows_sent: 10  Rows_examined: 115
use nappesetco;
SELECT p.*, pl.`description`, pl.`description_short`, pl.`link_rewrite`, pl.`meta_description`, pl.`meta_keywords`, pl.`meta_title`, pl.`name`, p.`ean13`, i.`id_image`, il.`legend`, t.`rate`, (p.`reduction_price` + (p.`reduction_percent` * p.`price`)) AS myprice, m.`name` AS manufacturer_name
       FROM `ps_product` p
       LEFT JOIN `ps_product_lang` pl ON (p.`id_product` = pl.`id_product` AND pl.`id_lang` = 2)
       LEFT JOIN `ps_image` i ON (i.`id_product` = p.`id_product` AND i.`cover` = 1)
       LEFT JOIN `ps_image_lang` il ON (i.`id_image` = il.`id_image` AND il.`id_lang` = 2)
       LEFT JOIN `ps_tax` t ON (t.`id_tax` = p.`id_tax`)
       LEFT JOIN `ps_manufacturer` m ON (m.`id_manufacturer` = p.`id_manufacturer`)
       WHERE (`reduction_price` > 0 OR `reduction_percent` > 0)
       AND (`reduction_from` = `reduction_to` OR (`reduction_from` <= '2011-01-17 14:01:43' AND `reduction_to` >= '2011-01-17 14:01:43'))
       AND p.`active` = 1
       AND p.`id_product` IN (
           SELECT cp.`id_product`
           FROM `ps_category_group` cg
           LEFT JOIN `ps_category_product` cp ON (cp.`id_category` = cg.`id_category`)
           WHERE cg.`id_group` IN (SELECT id_group FROM ps_customer_group WHERE id_customer = 19)
       )
       ORDER BY `myprice` DESC
       LIMIT 0, 10;



Je pourait mettre tout le log, mais je ne sais pas ci c'est une bonne idee car il y a toutes les requettes et le nom des bases. est ce risque?

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