wordpress数据库优化和清理冗余数据的方法
<p style='margin: 0px; padding: 5px 0px; outline: none; font-size: 14px; line-height: 30px; font-family: tahoma, arial, "Microsoft YaHei";'>提示：清理前请先备份数据库，以防出意外。</p>
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经实践发现，只要执行依次执行下面5个语句，就可以清理的比较干净了。尤其是 wp_posts 这个表，看看这个表有多少条记录。记录数应该等于你在后台管理界面看到的文章数目+页面数目。<br>
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<div style='margin: 3px auto 0px; padding: 0px 3px; outline: none; line-height: 21.6px; clear: both; border-width: 1px; border-style: solid; border-color: rgb(0, 153, 204); background: rgb(246, 251, 255); overflow: hidden; font-family: tahoma, arial, "Microsoft YaHei";'>
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<span style="line-height: 25.2px; cursor: pointer;"><u>复制代码</u></span>
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代码如下:</div>
<div id="phpcode2" style='margin: 0px auto 3px; padding: 0px 3px; outline: none; line-height: 25.2px; font-size: 14px; clear: both; border-right: 1px solid rgb(0, 153, 204); background: rgb(221, 237, 251); overflow: hidden; border-left: 1px solid rgb(0, 153, 204); word-break: break-all; border-bottom: 1px solid rgb(0, 153, 204); word-wrap: break-word; font-family: tahoma, arial, "Microsoft YaHei";'>
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DELETE FROM `wp_posts` WHERE `wp_posts`.`post_content` = '';<br>
DELETE FROM `wp_posts` WHERE `wp_posts`.`post_title` = '';<br>
DELETE FROM `wp_posts` WHERE `post_type` = 'revision';<br>
DELETE FROM `wp_postmeta` WHERE `meta_key` = '_edit_lock';<br>
DELETE FROM `wp_postmeta` WHERE `meta_key` = '_edit_last';</div>
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另外对于上面没有提到的一个表说明一下，wp_commentmeta，这个表是Akismet插件保存的垃圾信息记录，这个表如果长时间不清理的话，你会发现它要比其他表大的多，因此，像这个表，我的建议是，定期清空，SQL语句如下：<br>
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<div style='margin: 3px auto 0px; padding: 0px 3px; outline: none; line-height: 21.6px; clear: both; border-width: 1px; border-style: solid; border-color: rgb(0, 153, 204); background: rgb(246, 251, 255); overflow: hidden; font-family: tahoma, arial, "Microsoft YaHei";'>
<div style="margin: 0px; padding: 0px; outline: none; float: right; line-height: 25.2px; font-size: 14px;">
<span style="line-height: 25.2px; cursor: pointer;"><u>复制代码</u></span>
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代码如下:</div>
<div id="phpcode3" style='margin: 0px auto 3px; padding: 0px 3px; outline: none; line-height: 25.2px; font-size: 14px; clear: both; border-right: 1px solid rgb(0, 153, 204); background: rgb(221, 237, 251); overflow: hidden; border-left: 1px solid rgb(0, 153, 204); word-break: break-all; border-bottom: 1px solid rgb(0, 153, 204); word-wrap: break-word; font-family: tahoma, arial, "Microsoft YaHei";'>
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TRUNCATE TABLE `wp_commentmeta`</div>
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