【转】利用optimize、存储过程和系统表对mysql数据库表进行批量碎片清理释放表空间

内容导读

互联网集市收集整理的这篇技术教程文章主要介绍了【转】利用optimize、存储过程和系统表对mysql数据库表进行批量碎片清理释放表空间，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含4085字，纯文字阅读大概需要6分钟。

内容图文

这个存储过程目的是给一个库的所有表来整理碎片的。一个表随着插入很频繁，或者一直更新不停的，就会积累好多碎片。如果及时整理一下，查询效率会高出好多。

DELIMITER $$

DROP PROCEDURE IF EXISTS `mysql`.`sp_optimize_tables`$$

CREATE PROCEDURE `mysql`.`sp_optimize_tables`(
 IN db_name varchar(255))
BEGIN
  -- Created by david yeung 20080128.

  -- To optimize all the tables in exact database.

  declare cnt int default 0;
  declare i int default 0;
  select count(*) as total from information_schema.tables where table_schema = db_name into cnt;
  while i < cnt
  do
    -- Get the table‘s exact name.
    set @stmt = concat(‘select table_name from information_schema.tables where table_schema = ‘‘‘,db_name,‘‘‘ order by table_name asc limit ‘,i,‘,1 into @tb_name‘);
    prepare s1 from @stmt;
    execute s1;
    drop prepare s1;
    set @stmt = ‘‘;
    set @stmt = concat(‘optimize table ‘,db_name,‘.‘,@tb_name);
    prepare s1 from @stmt;
    execute s1;
    drop prepare s1;
    set @stmt = ‘‘;
    set i = i + 1;
  end while;
  -- Refresh tables.

  flush tables;
END$$

DELIMITER ;

调用示例：

mysql> use mysql
Database changed
mysql> call sp_optimize_tables(‘david_test‘);
+------------------------------+----------+----------+----------+
| Table                        | Op       | Msg_type | Msg_text |
+------------------------------+----------+----------+----------+
| david_test.test1 | optimize | status   | OK       |
+------------------------------+----------+----------+----------+
1 row in set (0.26 sec)

+--------------------------+----------+----------+----------+
| Table                    | Op       | Msg_type | Msg_text |
+--------------------------+----------+----------+----------+
| david_test.test2| optimize | status   | OK       |
+--------------------------+----------+----------+----------+
1 row in set (0.35 sec)

+---------------------------------------+----------+----------+----------+
| Table                                 | Op       | Msg_type | Msg_text |
+---------------------------------------+----------+----------+----------+
| david_test.test3 | optimize | status   | OK       |
+---------------------------------------+----------+----------+----------+
1 row in set (0.45 sec)

+--------------------------+----------+----------+----------+
| Table                    | Op       | Msg_type | Msg_text |
+--------------------------+----------+----------+----------+
| david_test.test_article | optimize | status   | OK       |
+--------------------------+----------+----------+----------+
1 row in set (4.13 sec)

...

+----------------------------------+----------+----------+----------+
| Table                            | Op       | Msg_type | Msg_text |
+----------------------------------+----------+----------+----------+
| david_test.test_article_content | optimize | status   | OK       |
+----------------------------------+----------+----------+----------+
1 row in set (37.81 sec)

+-----------------------+----------+----------+----------+
| Table                 | Op       | Msg_type | Msg_text |
+-----------------------+----------+----------+----------+
| david_test.members | optimize | status   | OK       |
+-----------------------+----------+----------+----------+
1 row in set (40.02 sec)

+--------------------+----------+----------+----------+
| Table              | Op       | Msg_type | Msg_text |
+--------------------+----------+----------+----------+
| david_test.test_site | optimize | status   | OK       |
+--------------------+----------+----------+----------+
1 row in set (40.31 sec)

+--------------+----------+----------+----------+
| Table        | Op       | Msg_type | Msg_text |
+--------------+----------+----------+----------+
| david_test.t | optimize | status   | OK       |
+--------------+----------+----------+----------+
1 row in set (41.10 sec)

Query OK, 0 rows affected (41.13 sec)

【转】利用optimize、存储过程和系统表对mysql数据库表进行批量碎片清理释放表空间

标签：

本文系统来源：http://www.cnblogs.com/rwxwsblog/p/4528577.html

内容总结

以上是互联网集市为您收集整理的【转】利用optimize、存储过程和系统表对mysql数据库表进行批量碎片清理释放表空间全部内容，希望文章能够帮你解决【转】利用optimize、存储过程和系统表对mysql数据库表进行批量碎片清理释放表空间所遇到的程序开发问题。 如果觉得互联网集市技术教程内容还不错，欢迎将互联网集市网站推荐给程序员好友。

内容备注

版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 gblab@vip.qq.com 举报，一经查实，本站将立刻删除。

内容手机端