WordPress 千种分类崩溃网站
Posted
技术标签:
【中文标题】WordPress 千种分类崩溃网站【英文标题】:Wordpress thousand of categories crashing site 【发布时间】:2017-01-06 19:43:59 【问题描述】:我有一个大网站,目前我每天有大约 10k 的独立访问者,我有 2000 个类别、12k 个标签、36k 个自定义分类。
这不是设计缺陷,因为它是一个观看在线电影的网站,我使用过,季节类别和类似的东西,自定义分类法是 Actors、regizors 等。
问题是我的主机在 100% 处理器下不断崩溃,资源不是问题,因为我有自己的服务器,配备 4xXeon、64 GB 内存。
我已经隔离了这个问题,这是由于查询速度非常慢,例如,我有什么选择? :
# Time: 160830 17:01:20
# User@Host: razvypp[razvypp] @ localhost []
# Query_time: 9.159090 Lock_time: 0.001680 Rows_sent: 30 Rows_examined: 420117
SET timestamp=1472565680;
SELECT wphn_posts.ID
FROM wphn_posts
INNER JOIN wphn_term_relationships
ON (wphn_posts.ID = wphn_term_relationships.object_id)
WHERE 1=1
AND ( wphn_term_relationships.term_taxonomy_id IN (3630,
4955,4956,4957,4958,4959,4960,4961,4962,4963,4964,4965,
4966,4967,4968,4969,4970,4971,4972,4973,4974,4975,4976,
4977,4978,4979,4980,4981,4982,4983,4984,4985,4986,4987,
4988,4989,4990,4991,4992,4993,4994,4995,4996,4997,4998,
4999,5000,5001,5002,5003,5004,5005,5006,5007,5008,5009,
5010,5011,5012, ... (hundreds of numbers) ...,49740,49779)
这里是表格的转储
-- phpMyAdmin SQL Dump
-- version 4.4.15
-- http://www.phpmyadmin.net
--
-- Host: localhost
-- Generation Time: 30 Aug 2016 la 15:17
-- Versiune server: 5.5.51-log
-- PHP Version: 5.5.37
SET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO";
SET time_zone = "+00:00";
/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
/*!40101 SET NAMES utf8mb4 */;
--
-- Database: `trolio`
--
-- --------------------------------------------------------
--
-- Structura de tabel pentru tabelul `wphn_posts`
--
CREATE TABLE IF NOT EXISTS `wphn_posts` (
`ID` bigint(20) unsigned NOT NULL,
`movie_type` int(2) NOT NULL,
`post_author` bigint(20) unsigned NOT NULL DEFAULT '0',
`post_date` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
`post_date_gmt` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
`post_content` longtext NOT NULL,
`post_title` text NOT NULL,
`post_excerpt` text NOT NULL,
`post_status` varchar(20) NOT NULL DEFAULT 'publish',
`comment_status` varchar(20) NOT NULL DEFAULT 'open',
`ping_status` varchar(20) NOT NULL DEFAULT 'open',
`post_password` varchar(20) NOT NULL DEFAULT '',
`post_name` varchar(200) NOT NULL DEFAULT '',
`to_ping` text NOT NULL,
`pinged` text NOT NULL,
`post_modified` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
`post_modified_gmt` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
`post_content_filtered` longtext NOT NULL,
`post_parent` int(20) unsigned NOT NULL DEFAULT '0',
`guid` varchar(255) NOT NULL DEFAULT '',
`menu_order` int(11) NOT NULL DEFAULT '0',
`post_type` varchar(20) NOT NULL DEFAULT 'post',
`post_mime_type` varchar(100) NOT NULL DEFAULT '',
`comment_count` bigint(20) NOT NULL DEFAULT '0',
`views` int(99) NOT NULL,
`views_this_week` int(5) NOT NULL,
`imdb` double NOT NULL,
`imdb_votes` float NOT NULL,
`imdb_id` varchar(20) NOT NULL,
`fb_shares_root` int(5) NOT NULL,
`movie_name` varchar(140) NOT NULL,
`season` int(2) NOT NULL,
`episode` int(5) NOT NULL,
`serial_id` int(10) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
-- --------------------------------------------------------
--
-- Structura de tabel pentru tabelul `wphn_term_relationships`
--
CREATE TABLE IF NOT EXISTS `wphn_term_relationships` (
`object_id` bigint(20) unsigned NOT NULL DEFAULT '0',
`term_taxonomy_id` bigint(20) unsigned NOT NULL DEFAULT '0',
`term_order` int(11) NOT NULL DEFAULT '0'
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
-- --------------------------------------------------------
--
-- Structura de tabel pentru tabelul `wphn_term_taxonomy`
--
CREATE TABLE IF NOT EXISTS `wphn_term_taxonomy` (
`term_taxonomy_id` bigint(20) unsigned NOT NULL,
`term_id` bigint(20) unsigned NOT NULL DEFAULT '0',
`taxonomy` varchar(32) NOT NULL DEFAULT '',
`description` longtext NOT NULL,
`parent` bigint(20) unsigned NOT NULL DEFAULT '0',
`count` bigint(20) NOT NULL DEFAULT '0'
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
--
-- Indexes for dumped tables
--
--
-- Indexes for table `wphn_posts`
--
ALTER TABLE `wphn_posts`
ADD PRIMARY KEY (`ID`),
ADD KEY `post_name` (`post_name`(191)),
ADD KEY `type_status_date` (`post_type`,`post_status`,`post_date`,`ID`),
ADD KEY `post_parent` (`post_parent`),
ADD KEY `post_author` (`post_author`),
ADD KEY `serial_id` (`serial_id`),
ADD KEY `episode` (`episode`),
ADD KEY `season` (`season`),
ADD KEY `movie_name` (`movie_name`);
--
-- Indexes for table `wphn_term_relationships`
--
ALTER TABLE `wphn_term_relationships`
ADD PRIMARY KEY (`object_id`,`term_taxonomy_id`),
ADD KEY `term_taxonomy_id` (`term_taxonomy_id`),
ADD KEY `term_order` (`term_order`);
--
-- Indexes for table `wphn_term_taxonomy`
--
ALTER TABLE `wphn_term_taxonomy`
ADD PRIMARY KEY (`term_taxonomy_id`),
ADD UNIQUE KEY `term_id_taxonomy` (`term_id`,`taxonomy`),
ADD KEY `taxonomy` (`taxonomy`),
ADD KEY `parent` (`parent`),
ADD KEY `count` (`count`),
ADD KEY `term_id` (`term_id`);
--
-- AUTO_INCREMENT for dumped tables
--
--
-- AUTO_INCREMENT for table `wphn_posts`
--
ALTER TABLE `wphn_posts`
MODIFY `ID` bigint(20) unsigned NOT NULL AUTO_INCREMENT;
--
-- AUTO_INCREMENT for table `wphn_term_taxonomy`
--
ALTER TABLE `wphn_term_taxonomy`
MODIFY `term_taxonomy_id` bigint(20) unsigned NOT NULL AUTO_INCREMENT;
/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
【问题讨论】:
我猜您也可以从表格中获得该数字列表。加入该表而不是使用IN()
查询来自wordpress核心,这就是问题所在。
【参考方案1】:
“已检查的行数”= 420K -- 这有点缺少索引的味道。
可能丢失:
INDEX(term_taxonomy_id, object_id)
请为这两个表提供SHOW CREATE TABLE
。
innodb_buffer_pool_size
的值是多少?
【讨论】:
innodb_buffer_pool_size=20GB 我刚刚检查了,所有索引都设置好了。 "所有索引"??请记住,我推荐的“复合”索引不同于每列中的单独索引。 索引是wordpress默认的,我没有以任何方式改变它们。 请提供SHOW CREATE TABLE
,以便我们讨论。而且(我认为)您可以向 WP 表添加索引。
好的,该索引存在。基本上没有理由在该查询中提及wphn_posts
;你能把它去掉吗?能否提供EXPLAIN SELECT ...
。以上是关于WordPress 千种分类崩溃网站的主要内容,如果未能解决你的问题,请参考以下文章
php 这个WordPress插件演示了如何使用WordPress提供的可拖动元文件构建自己的插件页面,需要WordPr