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我在安装 WordPress 时遇到了一些性能问题。我已经运行了多个慢查询测试，虽然我确实看到了它们之间的一些一致性，但我仍然无法查明问题所在。以下是我多次看到的一些查询：

SET timestamp=1333980631;
SELECT SQL_CALC_FOUND_ROWS wp_posts.* FROM wp_posts INNER JOIN wp_term_relationships ON (wp_posts.ID = wp_term_relationships.object_id) WHERE 1=1 AND ( wp_term_relationships.term_taxonomy_id IN (1442,4054) ) AND wp_posts.post_type = 'post' AND (wp_posts.post_status = 'publish' OR wp_posts.post_status = 'private') GROUP BY wp_posts.ID ORDER BY wp_posts.post_date DESC LIMIT 0, 2;

和

### 1 Query 
### Total time: 3.015405, Average time: 3.015405
### Taking 3.015405 seconds to complete
### Rows analyzed 60
SET timestamp=XXX;
SELECT SQL_CALC_FOUND_ROWS wp_posts.* FROM wp_posts INNER JOIN wp_term_relationships ON (wp_posts.ID = wp_term_relationships.object_id) WHERE XXX=XXX AND ( wp_term_relationships.term_taxonomy_id IN (XXX) ) AND wp_posts.post_type = 'XXX' AND (wp_posts.post_status = 'XXX') GROUP BY wp_posts.ID ORDER BY wp_posts.post_date DESC LIMIT XXX, XXX;

SET timestamp=1334004964;
SELECT SQL_CALC_FOUND_ROWS wp_posts.* FROM wp_posts INNER JOIN wp_term_relationships ON (wp_posts.ID = wp_term_relationships.object_id) WHERE 1=1 AND ( wp_term_relationships.term_taxonomy_id IN (125) ) AND wp_posts.post_type = 'post' AND (wp_posts.post_status = 'publish') GROUP BY wp_posts.ID ORDER BY wp_posts.post_date DESC LIMIT 0, 8;

和

### 1 Query 
### Total time: 1.593301, Average time: 1.593301
### Taking 1.593301 seconds to complete
### Rows analyzed 19755
SET timestamp=XXX;
SELECT /*!XXX SQL_NO_CACHE */ * FROM `wp_posts`;

SET timestamp=1333978522;
SELECT /*!40001 SQL_NO_CACHE */ * FROM `wp_posts`;

我注意到这wp_term_taxonomy似乎与wp_posts以及其他一些一起出现。我的问题是，如何缩小这些结果并找到问题？

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1 回答 1

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你可以：

  1. 使用插件性能分析器对有问题的插件进行基准测试和查明
  2. 用新遗物找问题
  3. 使用调试对象转储查询数据等。

queries you showed looks like usual wp-admin queries, or pager query to define how many pages to show on listings.

you could also try simplest approach - to disable plugins one by one to determine which one is generating your problematic queries.

于 2012-04-10T13:34:13.730 回答