MariaDB日志类型

MariaDB日志类型

日志

1.binary log

记录数据库所有修改动作的事件描述,二进制格式,需要和服务器兼容的mysqlbinlog来读取

开启方式:

[mysqld]

log_bin=/opt/mariadb/data/mysql_bin #log_bin=mysql_bin默认也是放在data目录

读取binlog

mysqlbinlog /opt/mariadb/data/mysql-bin.000001

2.error log(critical errors)

记录数据库startup,shutdown,fails 默认文件名为hostname.err,

开启方式:

[mysqld]

log_error  = /opt/mariadb/log/mysqld.log

3.general query log(performance killer)

默认禁用, 任何对mysql的操作都会记录日志,即使没有改变任何数据,

开启方式:

[mysqld]

general_log = 1 #on(=1), off(=0)

general_log_file = /opt/mariadb/log/general.log

4.slow query log(optimizing&tuning)

默认禁用，数据库调优时非常有用

开启方式：

[mysqld]

slow_query_log = 1

slow_query_log_file = /opt/mariadb/log/mysqld-slow.log

long_query_time = 0.05

log_slow_rate_limit = 30 #记录slow query的频率，默认是每次都记录，适当的值可以避免日志暴涨

log_slow_verbosity = query_plan,standard

#log_slow_verbosity有如下几个参数

• microtime: Makes the log to log the queries in microseconds

• query_plan: Logs query execution plan information

• innodb: Adds additional statistical information about queries that touch XtraDB and InnoDB tables

• standard: Turns on both the microtime and innodb variables

• full: Turns on all options

• profiling: Allows the logged queries to be pro led