Home Database Mysql Tutorial MYSQL日志的正确删除方法详解_MySQL

MYSQL日志的正确删除方法详解_MySQL

May 27, 2016 pm 01:44 PM
mysql Delete method log

本文详细讲述了MYSQL日志的正确删除方法。分享给大家供大家参考,具体如下:

1.查找:

MySQL> show binary logs;
+—————-+———–+
| Log_name | File_size |
+—————-+———–+
| mysql-bin.000001 | 150462942 |
| mysql-bin.000002 | 125 |
| mysql-bin.000003 | 106 |
+—————-+———–+

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2.删除bin-log(删除mysql-bin.000003之前的而没有包含mysql-bin.000003)

mysql> purge binary logs to 'mysql-bin.000003';
Query OK, 0 rows affected (0.16 sec)

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3. 查询结果(现在只有一条记录了.)

mysql> show binlog events/G
*************************** 1. row ***************************
Log_name: mysql-bin.000003
Pos: 4
Event_type: Format_desc
Server_id: 1
End_log_pos: 106
Info: Server ver: 5.1.26-rc-log, Binlog ver: 4
1 row in set (0.01 sec)
(mysql-bin.000001和mysql-bin.000002已被删除)
mysql> show binary logs;
+—————-+———–+
| Log_name | File_size |
+—————-+———–+
| mysql-bin.000003 | 106 |
+—————-+———–+
1 row in set (0.00 sec)

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(删除的其它格式运用!)

PURGE {MASTER | BINARY} LOGS TO 'log_name'
PURGE {MASTER | BINARY} LOGS BEFORE 'date'

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用于删除列于在指定的日志或日期之前的日志索引中的所有二进制日志。这些日志也会从记录在日志索引文件中的清单中被删除,这样被给定的日志成为第一个。

例如:

PURGE MASTER LOGS TO 'mysql-bin.010′;
PURGE MASTER LOGS BEFORE '2008-06-22 13:00:00′;

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清除3天前的 binlog

PURGE MASTER LOGS BEFORE DATE_SUB( NOW( ), INTERVAL 3 DAY);

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BEFORE变量的date自变量可以为'YYYY-MM-DD hh:mm:ss'格式。MASTER和BINARY是同义词。

如果您有一个活性的从属服务器,该服务器当前正在读取您正在试图删除的日志之一,则本语句不会起作用,而是会失败,并伴随一个错误。不过,如果从属服务器是休止的,并且您碰巧清理了其想要读取的日志之一,则从属服务器启动后不能复制。当从属服务器正在复制时,本语句可以安全运行。您不需要停止它们。

代码如下:

0 1 * * *  `mysql -uroot -e 'PURGE MASTER LOGS BEFORE DATE_SUB( NOW( ), INTERVAL 3 DAY);'`

更多关于MySQL相关内容感兴趣的读者可查看本站专题:《MySQL日志操作技巧大全》、《MySQL事务操作技巧汇总》、《MySQL存储过程技巧大全》、《MySQL数据库锁相关技巧汇总》及《MySQL常用函数大汇总》

希望本文所述对大家MySQL数据库计有所帮助。

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