Question

Django Admin上的某些页面出现问题，导致MySQL的查询卡住（cpu为100％）。

几个星期前，我不得不将所有表从MyISAM转换为InnoDB。这项工作运作良好。

但在某些网页上，请求已被冻结。经过一些调查，我发现这是MySQL的查询。

我注意到外键丢失了。所以我添加了丢失的外键并且查询工作正常。它适用于我的机器（localhost），但不适用于现场。每次我在现场加载页面时，我都必须重新启动MySQL服务器。

我通过MySQL工作台运行查询：

on local：好的
on live：stuck

实时环境：AWS（带有RDS的EC2），Django 1.10.5和MySQL 5.6.x 本地环境：Django 1.10.5和MySQL 5.7.x

我一直坚持寻找解决方案而且我不知道现在该做什么或寻找。

请告知。

*编辑31-01-2017 *

正在执行的查询：

SELECT `clients_campaignday`.*, `clients_campaign`.*,  `clients_client`.*
 FROM `clients_campaignday` 
 INNER JOIN `clients_campaign` ON (`clients_campaignday`.`campaign_id` = `clients_campaign`.`id`) 
 INNER JOIN `clients_client` ON (`clients_campaign`.`client_id` = `clients_client`.`id`) 
ORDER BY `clients_campaignday`.`day` DESC, `clients_campaignday`.`id` DESC LIMIT 50

解释本地：

的查询

+----+-------------+---------------------+------------+--------+------------------------------------------------------------------+---------+---------+-------------------------------------------------+-------+----------+----------------+
| id | select_type | table               | partitions | type   | possible_keys                                                    | key     | key_len | ref                                             | rows  | filtered | Extra          |
+----+-------------+---------------------+------------+--------+------------------------------------------------------------------+---------+---------+-------------------------------------------------+-------+----------+----------------+
|  1 | SIMPLE      | clients_campaignday | NULL       | ALL    | clients_campaignday_6cd0afe2,idx_clients_campaignday_campaign_id | NULL    | NULL    | NULL                                            | 51839 |   100.00 | Using filesort |
|  1 | SIMPLE      | clients_campaign    | NULL       | eq_ref | PRIMARY,clients_campaign_4fea5d6a                                | PRIMARY | 4       | tool_2017_01_30.clients_campaignday.campaign_id |     1 |   100.00 | NULL           |
|  1 | SIMPLE      | clients_client      | NULL       | eq_ref | PRIMARY                                                          | PRIMARY | 4       | tool_2017_01_30.clients_campaign.client_id      |     1 |   100.00 | NULL           |
+----+-------------+---------------------+------------+--------+------------------------------------------------------------------+---------+---------+-------------------------------------------------+-------+----------+----------------+

解释直播：

的查询

+----+-------------+---------------------+------------+--------+----------------------------------------------------------------------------+-----------------------------------------------+---------+-----------------------------------------+------+----------+---------------------------------+
| id | select_type | table               | partitions | type   | possible_keys                                                              | key                                           | key_len | ref                                     | rows | filtered | Extra                           |
+----+-------------+---------------------+------------+--------+----------------------------------------------------------------------------+-----------------------------------------------+---------+-----------------------------------------+------+----------+---------------------------------+
|  1 | SIMPLE      | clients_campaign    | NULL       | ALL    | PRIMARY,clients_campaign_4fea5d6a                                          | NULL                                          | NULL    | NULL                                    |  145 |   100.00 | Using temporary; Using filesort |
|  1 | SIMPLE      | clients_client      | NULL       | eq_ref | PRIMARY                                                                    | PRIMARY                                       | 4       | tool_v3_prod.clients_campaign.client_id |    1 |   100.00 | NULL                            |
|  1 | SIMPLE      | clients_campaignday | NULL       | ref    | clients_campaignday_campaign_id_283ca030_uniq,clients_campaignday_6cd0afe2 | clients_campaignday_campaign_id_283ca030_uniq | 4       | tool_v3_prod.clients_campaign.id        |  201 |   100.00 | NULL                            |
+----+-------------+---------------------+------------+--------+----------------------------------------------------------------------------+-----------------------------------------------+---------+-----------------------------------------+------+----------+---------------------------------+

在本地：

上显示创建表格

CREATE TABLE `clients_campaignday` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `campaign_id` int(11) NOT NULL,
  `day` date NOT NULL,
  `cache_power` int(11) DEFAULT NULL,
  `nb_articles` int(11) DEFAULT NULL,
  `add_datetime` datetime NOT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `clients_campaignday_campaign_id_283ca030_uniq` (`campaign_id`,`day`),
  KEY `clients_campaignday_6cd0afe2` (`campaign_id`),
  CONSTRAINT `clients_campaignday_ibfk_1` FOREIGN KEY (`campaign_id`) REFERENCES `clients_campaign` (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=80960 DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC;

在实时：

上显示创建表格

CREATE TABLE `clients_campaignday` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `campaign_id` int(11) NOT NULL,
  `day` date NOT NULL,
  `cache_power` int(11) DEFAULT NULL,
  `nb_articles` int(11) DEFAULT NULL,
  `add_datetime` datetime NOT NULL,
  PRIMARY KEY (`id`),
  KEY `clients_campaignday_6cd0afe2` (`campaign_id`),
  KEY `idx_clients_campaignday_campaign_id` (`campaign_id`),
  CONSTRAINT `clients_campaignday_campaign_id_6dac75d8_fk_clients_campaign_id` FOREIGN KEY (`campaign_id`) REFERENCES `clients_campaign` (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=80960 DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC;

*编辑02-02-2017 *

在调查EXPLAIN结果后，我在当地找到了一些线索。

我应用了一个添加外键并优化数据库的SQL查询：

-- Table : clients_campaign
ALTER TABLE clients_campaign ADD CONSTRAINT clients_campaign_client_id_j3w96j6U FOREIGN KEY (client_id) REFERENCES clients_client(id);

-- Table : clients_campaignday
ALTER TABLE clients_campaignday ADD CONSTRAINT clients_campaignday_campaign_id_69svf27c FOREIGN KEY (campaign_id) REFERENCES clients_campaign(id);

-- Optimize tables
OPTIMIZE TABLE clients_campaignday, clients_campaign;

现在执行的顺序是固定的，但MySQL仍然停留在100％，我不知道为什么。

请建议。

MySQL的查询被卡住了，cpu 100％正常运行但不是本地查询

0 个答案: