Voici ma lente requête:
SELECT `products_counts`.`cid`
FROM
`products_counts` `products_counts`
LEFT OUTER JOIN `products` `products` ON (
`products_counts`.`product_id` = `products`.`id`
)
LEFT OUTER JOIN `trademarks` `trademark` ON (
`products`.`trademark_id` = `trademark`.`id`
)
LEFT OUTER JOIN `suppliers` `supplier` ON (
`products_counts`.`supplier_id` = `supplier`.`id`
)
WHERE
`products_counts`.product_id IN
(159, 572, 1075, 1102, 1145, 1162, 1660, 2355, 2356, 2357, 3236, 6471, 6472, 6473, 8779, 9043, 9095, 9336, 9337, 9338, 9445, 10198, 10966, 10967, 10974, 11124, 11168, 16387, 16689, 16827, 17689, 17920, 17938, 17946, 17957, 21341, 21352, 21420, 21421, 21429, 21544, 27944, 27988, 30194, 30196, 30230, 30278, 30699, 31306, 31340, 32625, 34021, 34047, 38043, 43743, 48639, 48720, 52453, 55667, 56847, 57478, 58034, 61477, 62301, 65983, 66013, 66181, 66197, 66204, 66407, 66844, 66879, 67308, 68637, 73944, 74037, 74060, 77502, 90963, 101630, 101900, 101977, 101985, 101987, 105906, 108112, 123839, 126316, 135156, 135184, 138903, 142755, 143046, 143193, 143247, 144054, 150164, 150406, 154001, 154546, 157998, 159896, 161695, 163367, 170173, 172257, 172732, 173581, 174001, 175126, 181900, 182168, 182342, 182858, 182976, 183706, 183902, 183936, 184939, 185744, 287831, 362832, 363923, 7083107, 7173092, 7342593, 7342594, 7342595, 7728766)
ORDER BY
products_counts.inflow ASC,
supplier.delivery_period ASC,
trademark.sort DESC,
trademark.name ASC
LIMIT
0, 3;
Le temps de requête moyen est de 4,5 secondes sur mon jeu de données, ce qui est inacceptable.
Solutions que je vois:
Ajoutez toutes les colonnes de la clause order à la products_counts
table. Mais j'ai ~ 10 types de commandes en application, donc je devrais créer beaucoup de colonnes et d'index. De products_counts
plus, les mises à jour / insertions / suppressions sont très intensives, j'ai donc besoin de mettre à jour immédiatement toutes les colonnes liées à la commande (à l'aide de déclencheurs?).
Y a-t-il une autre solution?
Explique:
+----+-------------+-----------------+--------+---------------------------------------------+------------------------+---------+----------------------------------+------+----------------------------------------------+
| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
+----+-------------+-----------------+--------+---------------------------------------------+------------------------+---------+----------------------------------+------+----------------------------------------------+
| 1 | SIMPLE | products_counts | range | product_id_supplier_id,product_id,pid_count | product_id_supplier_id | 4 | NULL | 227 | Using where; Using temporary; Using filesort |
| 1 | SIMPLE | products | eq_ref | PRIMARY | PRIMARY | 4 | uaot.products_counts.product_id | 1 | |
| 1 | SIMPLE | trademark | eq_ref | PRIMARY | PRIMARY | 4 | uaot.products.trademark_id | 1 | |
| 1 | SIMPLE | supplier | eq_ref | PRIMARY | PRIMARY | 4 | uaot.products_counts.supplier_id | 1 | |
+----+-------------+-----------------+--------+---------------------------------------------+------------------------+---------+----------------------------------+------+----------------------------------------------+
Structure des tables:
CREATE TABLE `products_counts` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`product_id` int(11) unsigned NOT NULL,
`supplier_id` int(11) unsigned NOT NULL,
`count` int(11) unsigned NOT NULL,
`cid` varchar(64) NOT NULL,
`inflow` varchar(10) NOT NULL,
`for_delete` tinyint(1) unsigned NOT NULL DEFAULT '0',
PRIMARY KEY (`id`),
UNIQUE KEY `cid` (`cid`),
UNIQUE KEY `product_id_supplier_id` (`product_id`,`supplier_id`),
KEY `product_id` (`product_id`),
KEY `count` (`count`),
KEY `pid_count` (`product_id`,`count`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
CREATE TABLE `products` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`external_id` varchar(36) NOT NULL,
`name` varchar(255) NOT NULL,
`category_id` int(11) unsigned NOT NULL,
`trademark_id` int(11) unsigned NOT NULL,
`photo` varchar(255) NOT NULL,
`sort` int(11) unsigned NOT NULL,
`otech` tinyint(1) unsigned NOT NULL,
`not_liquid` tinyint(1) unsigned NOT NULL DEFAULT '0',
`applicable` varchar(255) NOT NULL,
`code_main` varchar(64) NOT NULL,
`code_searchable` varchar(128) NOT NULL,
`total` int(11) unsigned NOT NULL,
`slider` int(11) unsigned NOT NULL,
`slider_title` varchar(255) NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `external_id` (`external_id`),
KEY `category_id` (`category_id`),
KEY `trademark_id` (`trademark_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
CREATE TABLE `trademarks` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`external_id` varchar(36) NOT NULL,
`name` varchar(255) NOT NULL,
`country_id` int(11) NOT NULL,
`sort` int(11) unsigned NOT NULL DEFAULT '0',
`sort_list` int(10) unsigned NOT NULL DEFAULT '0',
`is_featured` tinyint(1) unsigned NOT NULL,
`is_direct` tinyint(1) unsigned NOT NULL DEFAULT '0',
PRIMARY KEY (`id`),
UNIQUE KEY `external_id` (`external_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
CREATE TABLE `suppliers` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`external_id` varchar(36) NOT NULL,
`code` varchar(64) NOT NULL,
`name` varchar(255) NOT NULL,
`delivery_period` tinyint(1) unsigned NOT NULL,
`is_default` tinyint(1) unsigned NOT NULL,
PRIMARY KEY (`id`),
KEY `external_id` (`external_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
Informations sur le serveur MySQL:
mysqld Ver 5.5.45-1+deb.sury.org~trusty+1 for debian-linux-gnu on i686 ((Ubuntu))
(inflow, product_id)
?
innodb_buffer_pool_size
. En général, environ 70% de la RAM disponible est bonne.