/*optimize */
— 1、温馨提醒优化之前切记先备份下数据
— 2、删除所有日志修订
— — — 影响wordpress运行速度的根源在于日志的修订记录,一百多篇文章会有一千多条的日志修订的记录,所以此步优化必须做,提速效果非常明显。执行以下SQL语句:
— DELETE a,b,c FROM wp_posts a LEFT JOIN
— wp_term_relationships b ON (a.ID = b.object_id) LEFT JOIN wp_postmeta c ON (a.ID
— = c.post_id) WHERE a.post_type = ‘revision’
DELETE a,b,c FROM wp_z8tmn5qbx1_posts a LEFT JOIN
wp_term_relationships b ON (a.ID = b.object_id) LEFT JOIN wp_postmeta c ON (a.ID
= c.post_id) WHERE a.post_type = ‘revision’
SELECT
*
FROM
wp_z8tmn5qbx1_posts p
LEFT JOIN wp_z8tmn5qbx1_term_relationships
r ON p.id = r.object_id
LEFT JOIN wp_z8tmn5qbx1_postmeta
m ON ( p.id = m.post_id )
WHERE
post_type = ‘revision’
— 3、优化 wp_posts 表 写文章的时候进行的插入、更新或删除等都会产生不同大小的记录碎片,整理碎片这步要做。执行以下SQL语句:
OPTIMIZE TABLE
wp_posts;
— 4、删除所有垃圾留言 这个可以在后台一条一条的删除,也可以到MySQL执行下也行:
DELETE FROM wp_comments WHERE
comment_approved != ‘1’;
— –9148 records
select * from
wp_z8tmn5qbx1_comments
— 5、删除没有的标签 有些文章删除了,但标签还在,WordPress不会自动删除的,我们手动清理下吧, 执行以下SQL语句:
DELETE a,b,c
FROM
wp_terms AS
a
LEFT JOIN wp_term_taxonomy AS c ON a.term_id = c.term_id
LEFT JOIN
wp_term_relationships AS b ON b.term_taxonomy_id = c.term_taxonomy_id
WHERE
(
c.taxonomy = ‘post_tag’ AND
c.count =
0
);
— 11 records
select *
from wp_z8tmn5qbx1_terms
t,wp_z8tmn5qbx1_term_taxonomy
tax,wp_z8tmn5qbx1_term_relationships
tr
WHERE t.term_id =tax.term_id
and tax.term_taxonomy_id=tr.term_taxonomy_id
and (
tax.taxonomy = ‘post_tag’ AND
tax.count =
0
);
— 13
select *
fromwp_z8tmn5qbx1_terms
t LEFT JOINwp_z8tmn5qbx1_term_taxonomy
tax on t.term_id=tax.term_id left joinwp_z8tmn5qbx1_term_relationships
tr on tax.term_taxonomy_id= tr.term_taxonomy_id
where (
tax.taxonomy = ‘post_tag’ AND
tax.count =
0
);
—
— 6、删除没用的 postmeta 记录 当文章的记录删除后,还有日志扩展表postmeta的数据还没有删除,也人工清理下吧,执行以下SQL语句:
DELETE pm FROM wp_postmeta pm LEFT JOIN
wp_posts wp ON wp.ID = pm.post_id WHERE wp.ID IS NULL
— no records
SELECT
*
FROMwp_z8tmn5qbx1_postmeta
m
LEFT JOIN wp_z8tmn5qbx1_posts p ON ( p.id = m.post_id )
WHERE
p.id IS NULL
— 通过以上数据库命令优化,你的数据库是不是已经很小了呢,网站速度是不已经得到提升了呢,记得不要让自己的网站太过臃肿,以免影响访问哦。
评论表垃圾数据
DELETE FROM wp_z8tmn5qbx1_postmeta WHERE meta_key = ‘_edit_lock’;
DELETE FROM wp_z8tmn5qbx1_postmeta WHERE meta_key = ‘_edit_last’;
DELETE FROM wp_z8tmn5qbx1_postmeta WHERE meta_key = ‘_revision-control’;
DELETE FROM wp_z8tmn5qbx1_postmeta WHERE post_id NOT IN (SELECT post_id FROM wp_posts);
DELETE FROM wp_z8tmn5qbx1_postmeta WHERE meta_key = ‘_wp_old_slug’;
DELETE FROM wp_z8tmn5qbx1_postmeta WHERE meta_key = ‘_revision-control’;
DELETE FROM wp_z8tmn5qbx1_postmeta WHERE meta_value = ‘{{unknown}}’;
SELECT *
from wp_z8tmn5qbx1_postmeta WHERE meta_value = ‘ {{ unknown }} ‘;
SELECT *
from wp_z8tmn5qbx1_postmeta WHERE meta_key in (
‘_edit_lock’,
‘_edit_last’,
‘_revision-control’,
)
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