MYSQL中怎么调整日志组
本篇文章为大家展示了MYSQL中怎么调整日志组，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。
1、查看关闭方式：
mysql> show variables like '%fast%';
+----------------------+-------+
| Variable_name | Value |
+----------------------+-------+
| innodb_fast_shutdown | 1 |
+----------------------+-------+
1 row in set (0.00 sec)
该参数解释如下：,默认值为1，设置为0 是干净的关闭 和ORACLE里面shutdown immeidate对应
The InnoDB shutdown mode. If the value is 0, InnoDB does a slow shutdown, a full purge and a change buffer merge before shutting down. If the value is 1 (the default), InnoDB skips these operations at shutdown, a process known as a fast shutdown. If the value is 2, InnoDB flushes its logs and shuts down cold, as if MySQL had crashed; no committed transactions are lost, but the crash recovery operation makes the next startup take longer.。
2、调整参数innodb_fast_shutdown为0
set global innodb_fast_shutdown=0
3、关闭MYSQL
mysqladmin -uroot shutdown -S /home/mysql-5.6/mysql-3306/mysql.sock
4、调整REDO大小，日志文件默认命名是ib_logfile开头
1、找到REDO文件所在目录(有几个文件处理几个，移动到其他目录)。
mv ib_logfilexx ../ ib_logfilexx
2、添加参数:日志组个数和日志大小到参数文件
在参数文件[mysqld]下面添加如下参数
innodb_log_file_size = 512M -每个日志组大小512M
innodb_log_files_in_group = 3-一共3组日志组
5、 打开mysql
./mysqld_safe --defaults-file=/home/mysql-5.6/mysql-3307/my.cnf &
6、查看修改后的日志组大小和个数
mysql> show variables like '%log_file%';
+---------------------------+------------------------------------------------+
| Variable_name | Value |
+---------------------------+------------------------------------------------+
| general_log_file | /home/mysql-5.6/mysql-3306/data/test1.log |
| innodb_log_file_size | 536870912 |
| innodb_log_files_in_group | 3 |
| slow_query_log_file | /home/mysql-5.6/mysql-3306/data/test1-slow.log |
+---------------------------+------------------------------------------------+
4 rows in set (0.00 sec)
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