Question

我正在使用名为feedwordpress的WordPress插件，以便在wordpress上运行类似网站的行星（请参阅here）。

除了一件事之外，这个插件很棒 - 它每周都会让我的（VPS）服务器进入提交状态一次。

在最近与webadmin的电子邮件交流中，他写了以下内容：

它看起来像增加的mysql 资源使用是由缓慢造成的查询由r-bloggers.com运行。这是一些日志的副本正在制作中。你会需要优化这个网站和数据库进一步让它运行为尽可能高效。如果这些已经做出了改变，你的最好的选择是调查一下由于你的VPS大幅升级高水平或资源和交通您的网站需要并看到的内容。

以下是日志：

# Time: 110614 16:11:35
# User@Host: rblogger_rblogr[rblogger_rblogr] @ localhost []
# Query_time: 104 Lock_time: 0 Rows_sent: 0 Rows_examined: 54616
SELECT SQL_CALC_FOUND_ROWS wp_rb_posts.* FROM wp_rb_posts WHERE 1=1 AND ((guid = '235cbefa4424d0cdb7b6213f15a95ded') OR (guid = 'http://www.r-bloggers.com/?guid=235cbefa4424d0cdb7b6213f15a95ded') OR (guid = 'http://www.r-bloggers.com/?guid=235cbefa4424d0cdb7b6213f15a95ded') OR (MD5(guid) = '235cbefa4424d0cdb7b6213f15a95ded')) AND wp_rb_posts.post_type IN ('post', 'page', 'attachment', 'revision', 'nav_menu_item') AND (wp_rb_posts.post_status = 'publish' OR wp_rb_posts.post_status = 'future' OR wp_rb_posts.post_status = 'draft' OR wp_rb_posts.post_status = 'pending' OR wp_rb_posts.post_status = 'trash' OR wp_rb_posts.post_status = 'auto-draft' OR wp_rb_posts.post_status = 'inherit' OR wp_rb_posts.post_status = 'private') ORDER BY wp_rb_posts.post_date DESC LIMIT 1570, 10;
# User@Host: rblogger_rblogr[rblogger_rblogr] @ localhost []
# Query_time: 237 Lock_time: 0 Rows_sent: 0 Rows_examined: 54616
SELECT SQL_CALC_FOUND_ROWS wp_rb_posts.* FROM wp_rb_posts WHERE 1=1 AND ((guid = '235cbefa4424d0cdb7b6213f15a95ded') OR (guid = 'http://www.r-bloggers.com/?guid=235cbefa4424d0cdb7b6213f15a95ded') OR (guid = 'http://www.r-bloggers.com/?guid=235cbefa4424d0cdb7b6213f15a95ded') OR (MD5(guid) = '235cbefa4424d0cdb7b6213f15a95ded')) AND wp_rb_posts.post_type IN ('post', 'page', 'attachment', 'revision', 'nav_menu_item') AND (wp_rb_posts.post_status = 'publish' OR wp_rb_posts.post_status = 'future' OR wp_rb_posts.post_status = 'draft' OR wp_rb_posts.post_status = 'pending' OR wp_rb_posts.post_status = 'trash' OR wp_rb_posts.post_status = 'auto-draft' OR wp_rb_posts.post_status = 'inherit' OR wp_rb_posts.post_status = 'private') ORDER BY wp_rb_posts.post_date DESC LIMIT 570, 10;
# Time: 110614 16:18:13
# User@Host: rblogger_rblogr[rblogger_rblogr] @ localhost []
# Query_time: 257 Lock_time: 0 Rows_sent: 0 Rows_examined: 54616
SELECT SQL_CALC_FOUND_ROWS wp_rb_posts.* FROM wp_rb_posts WHERE 1=1 AND ((guid = '956e208f101562f6654e88e9711276e4') OR (guid = 'http://www.r-bloggers.com/?guid=956e208f101562f6654e88e9711276e4') OR (guid = 'http://www.r-bloggers.com/?guid=956e208f101562f6654e88e9711276e4') OR (MD5(guid) = '956e208f101562f6654e88e9711276e4')) AND wp_rb_posts.post_type IN ('post', 'page', 'attachment', 'revision', 'nav_menu_item') AND (wp_rb_posts.post_status = 'publish' OR wp_rb_posts.post_status = 'future' OR wp_rb_posts.post_status = 'draft' OR wp_rb_posts.post_status = 'pending' OR wp_rb_posts.post_status = 'trash' OR wp_rb_posts.post_status = 'auto-draft' OR wp_rb_posts.post_status = 'inherit' OR wp_rb_posts.post_status = 'private') ORDER BY wp_rb_posts.post_date DESC LIMIT 570, 10;
# Time: 110614 16:19:02
# User@Host: rblogger_rblogr[rblogger_rblogr] @ localhost []
# Query_time: 83 Lock_time: 0 Rows_sent: 0 Rows_examined: 54616
SELECT SQL_CALC_FOUND_ROWS wp_rb_posts.* FROM wp_rb_posts WHERE 1=1 AND ((guid = '6c589e661f03a67b0529fab2f080bfd3') OR (guid = 'http://www.r-bloggers.com/?guid=6c589e661f03a67b0529fab2f080bfd3') OR (guid = 'http://www.r-bloggers.com/?guid=6c589e661f03a67b0529fab2f080bfd3') OR (MD5(guid) = '6c589e661f03a67b0529fab2f080bfd3')) AND wp_rb_posts.post_type IN ('post', 'page', 'attachment', 'revision', 'nav_menu_item') AND (wp_rb_posts.post_status = 'publish' OR wp_rb_posts.post_status = 'future' OR wp_rb_posts.post_status = 'draft' OR wp_rb_posts.post_status = 'pending' OR wp_rb_posts.post_status = 'trash' OR wp_rb_posts.post_status = 'auto-draft' OR wp_rb_posts.post_status = 'inherit' OR wp_rb_posts.post_status = 'private') ORDER BY wp_rb_posts.post_date DESC LIMIT 1440, 10;

这引出了我的问题 - 这个日志中的内容可能告诉我发生了什么（为什么这样的查询需要这么长时间？）？是否可以优化这些？如果是这样，怎么样？

谢谢，塔尔

Answer 1

熟悉WordPress，我认为你应该附加一个关于该主题的正在进行的门票，或者创建一个新门票。

http://core.trac.wordpress.org/ticket/10469

http://core.trac.wordpress.org/ticket/10964

http://core.trac.wordpress.org/search?q=SQL_CALC_FOUND_ROWS

或者，放弃并使用更合适的工具来完成任务。

为大型数据库加速“SQL_CALC_FOUND_ROWS”SQL查询

1 个答案: