Home Database Mysql Tutorial Percona5.6首次提供了审计日志功能

Percona5.6首次提供了审计日志功能

Jun 07, 2016 pm 05:21 PM
mysql Audit log

如果有一天数据库里丢失了一条记录,开发让你查什么时候被谁从哪个IP,执行了delete操作,那么在之前的版本是无法查到的,而Percona最新版本5.6.17首次提供了审

如果有一天数据库里丢失了一条记录,开发让你查什么时候被谁从哪个IP,执行了delete操作,那么在之前的版本是无法查到的,,而Percona最新版本5.6.17首次提供了审计日志功能。

(注:截止2014年5月19日,官方MySQL5.6.17社区版和MariaDB10.0.11均没有提供该功能)


版本:

5.6.17-65.0-rel65.0-log Percona Server with XtraDB (GPL), Release rel65.0, Revision 587


安装插件:

INSTALL PLUGIN audit_log SONAME 'audit_log.so';


show plugins;你会发现

| audit_log                   | ACTIVE   | AUDIT              | audit_log.so | GPL     |


变量参数:

mysql> show global variables like 'audit%'; +--------------------------+--------------+ | Variable_name            | Value        | +--------------------------+--------------+ | audit_log_buffer_size    | 1048576      | | audit_log_file           | audit.log    | | audit_log_flush          | OFF          | | audit_log_format         | NEW          | | audit_log_policy         | ALL          | | audit_log_rotate_on_size | 0            | | audit_log_rotations      | 0            | | audit_log_strategy       | ASYNCHRONOUS | +--------------------------+--------------+ 8 rows in set (0.00 sec)

它先会把日志写入内存,然后再刷入磁盘里。


audit_log_strategy参数可以调整下面4个策略

1、ASYNCHRONOUS log using memory buffer, do not drop events if buffer is full 2、PERFORMANCE log using memory buffer, drop events if buffer is full 3、SEMISYNCHRONOUS log directly to file, do not fsync every event 4、SYNCHRONOUS log directly to file, fsync every event


4种策略性能压力测试:

wKiom1N5vAqRo1b3AACNoXALaCw271.jpg

这里用默认就可以。



audit_log_rotate_on_size参数表示超过定义的值,会自动轮训,切分日志。

audit_log_rotations参数限制表示文件的数量。


效果:

wKiom1N5vKzTVn3KAAHPmV2d8Fs718.jpg


参考文献:



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