mysql 动态修改参数

mysql>  show variables like '%sync_binlog%';+---------------+-------+| Variable_name | Value |+---------------+-------+| sync_binlog   | 2     |+---------------+-------+1 row in set (0.00 sec)SET GLOBAL sync_binlog = 5; 重新登录:[root@master aa]# mysql -uroot -p1234567Warning: Using a password on the command line interface can be insecure.Welcome to the MySQL monitor.  Commands end with ; or \g.Your MySQL connection id is 48Server version: 5.6.22-log Source distributionCopyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql>   show variables like '%sync_binlog%';+---------------+-------+| Variable_name | Value |+---------------+-------+| sync_binlog   | 5     |+---------------+-------+1 row in set (0.00 sec)还需要写入my.cnf文件