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HomeDatabaseMysql Tutorialwindows、linux 下启用mysql日志功能_MySQL

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在默认情况下,mysql安装是没有启用日志管理功能的,这为后续的维护带来很多不便的地方。

 

查看是否启用了日志
mysql>show variables like 'log_bin';

怎样知道当前的日志

mysql> show master status;

 

展示二进制日志数目 

mysql> show master logs;

看二进制日志文件用mysqlbinlog
shell>mysqlbinlog mail-bin.000001
或者shell>mysqlbinlog mail-bin.000001 | tail

在配置文件中指定log的輸出位置.
Windows:Windows 的配置文件为 my.ini,一般在 MySQL 的安装目录下或者 c:/Windows 下。
Linux:Linux 的配置文件为 my.cnf ,一般在 /etc 下。

日志文件类型概述:    
1.
错误日志   记录启动、运行或停止mysqld时出现的问题。
My.ini配置信息:
#Enter a name for the error log file.   Otherwise a default name will be used.
#log-error=d:/mysql_log_err.txt
2.
查询日志    记录建立的客户端连接和执行的语句。
My.ini配置信息:
#Enter a name for the query log file. Otherwise a default name will be used.
#log=d:/mysql_log.txt
3.
更新日志   记录更改数据的语句。不赞成使用该日志。
My.ini配置信息:
#Enter a name for the update log file. Otherwise a default name will be used.
#log-update=d:/mysql_log_update.txt
4.
二进制日志    记录所有更改数据的语句。还用于复制。
My.ini配置信息:
#Enter a name for the binary log. Otherwise a default name will be used.
#log-bin=d:/mysql_log_bin
5.
慢日志    记录所有执行时间超过long_query_time秒的所有查询或不使用索引的查询。
My.ini配置信息:
#Enter a name for the slow query log file. Otherwise a default name will be used.
#long_query_time =1
#log-slow-queries= d:/mysql_log_slow.txt

linux下:

 

在[mysqld] 中輸入

 

log-error=/usr/local/mysql/log/error.log
log=/usr/local/mysql/log/mysql.log
long_query_time=2
log-slow-queries= /usr/local/mysql/log/slowquery.log


windows下:

 

Sql代码

 

在[mysqld] 中輸入

 

##启动日志
log="E:/wamp/MySql/mysql_log/mysql.log"
##错误日志
log-error="E:/wamp/MySql/mysql_log/mysql.logerror.log"
##是指执行超过多久的sql会被log下来,这里是2秒
long_query_time=2
##慢查询日志
log-slow-queries= "E:/wamp/MySql/mysql_log/slowquery.log"

 

long_query_time =2 --是指执行超过多久的sql会被log下来,这里是2秒

 

log-slow-queries= /usr/local/mysql/log/slowquery.log --将查询返回较慢的语句进行记录

 

log-queries-not-using-indexes = nouseindex.log --就是字面意思,log下来没有使用索引的query

 

log=mylog.log --对所有执行语句进行记录

 

 

                                       至于准确的看懂日志文件,还需要读者仔细阅读,我也看不懂 嘿嘿    

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