mysql日志滚动

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1，查看log情况

代码如下: mysql> show global variables like '%log%'; +---------------------------------+---------------------------------+ | Variable_name                   | Value                           | +---------------------------------+---------------------------------+ | back_log                        | 50                              | | binlog_cache_size               | 32768                           | | binlog_format                   | MIXED                           | | expire_logs_days                | 0                               | | general_log                     | ON                              | | general_log_file                | /usr/local/mysql/mysql.log      | | log                             | ON                              | | log_bin                         | ON                              | | log_bin_trust_function_creators | OFF                             | | log_bin_trust_routine_creators  | OFF                             | | log_error                       | /var/log/mysqld.log             | | log_output                      | FILE                            | | log_queries_not_using_indexes   | OFF                             | | log_slave_updates               | OFF                             | | log_slow_queries                | ON                              | | log_warnings                    | 1                               | | max_binlog_cache_size           | 4294963200                      | | max_binlog_size                 | 1073741824                      | | max_relay_log_size              | 0                               | | relay_log                       |                                 | | relay_log_index                 |                                 | | relay_log_info_file             | relay-log.info                  | | relay_log_purge                 | ON                              | | relay_log_space_limit           | 0                               | | slow_query_log                  | ON                              | | slow_query_log_file             | /usr/local/mysql/mysql-slow.log | | sql_log_bin                     | ON                              | | sql_log_off                     | OFF                             | | sql_log_update                  | ON                              | | sync_binlog                     | 0                               | +---------------------------------+---------------------------------+ 30 rows in set (0.00 sec)

上面主要有三个日志文件，mysql.log,mysqd.log,mysql-slow.log，除了mysqld.log不能通过mysqladmin flush-logs来刷新日志外，其他的都可以，mysqld.log是服务器启动程序mysqld产生的。

 

2，生成日志刷新用户

代码如下: mysql> GRANT RELOAD ON *.* TO 'log'@'localhost' IDENTIFIED BY 'log'; Query OK, 0 rows affected (0.07 sec) mysql> flush privileges; Query OK, 0 rows affected (0.03 sec)

用root账户登录进去，添加一个log的用户。分开清楚一点。

 

3，日志滚动脚本，只保留一个星期的日志

代码如下: [root@linux ~]# vim log.sh   //添加以下内容 #!/bin/sh # log refresh  if [ -f $1 ]; then     echo "refresh ok" 1>&2 else     echo "log file do not exist;"     exit 1 fi LOG=$1 DB_USER="log" DB_PASS="log"                                                                                                        # Others vars DATE=`date +%w`                                         BIN_DIR="/usr/local/mysql/bin" mv ${LOG} ${LOG}_${DATE} ${BIN_DIR}/mysqladmin  -ulog -plog flush-logs 添加可执行权限chmod +x log.sh

 

脚本很简单，不过有一点要解释一下，就是mv ${LOG} ${LOG}_${DATE}，第一周会产生7个文件，第二周会覆盖上周的，星期一覆盖星期一，星期二覆盖星期二，以此内推。

4，日志滚动

代码如下: [root@linux ~]# ./log.sh /usr/local/mysql/mysql.log refresh ok [root@linux ~]# ls /usr/local/mysql/ |grep mysql mysql.log mysql.log_1