MYSQL - 限制资源的使用

MYSQL - 限制资源的使用

1、MAX_QUERIES_PER_HOUR 用来限制用户每小时运行的查询数量

mysql> grant select on *.* to 'cu_blog'@'localhost' identified by '123456' with

max_queries_per_hour 5;

Query OK, 0 rows affected (0.00 sec)

...

mysql> select user();

+-------------------+

| user()            |

+-------------------+

| cu_blog@localhost |

+-------------------+

1 row in set (0.00 sec)

当到了指定的次数时就会报错

mysql> select user();

ERROR 1226 (42000): User 'cu_blog' has exceeded the 'max_questions' resource (cu

rrent value: 5)

、MAX_UPDATES_PER_HOUR 用来限制用户每小时的修改数据库数据的数量。

mysql> grant select on *.* to 'cu_blog'@'localhost' with max_updates_per_hour 5;

Query OK, 0 rows affected (0.00 sec)

、MAX_CONNECTIONS_PER_HOUR用来控制用户每小时打开新连接的数量。

mysql> grant select on *.* to 'cu_blog'@'localhost' with max_connections_per_hou

r 5;

Query OK, 0 rows affected (0.00 sec)

、MAX_USER_CONNECTIONS 限制有多少用户连接MYSQL服务器。

mysql> grant select on *.* to 'cu_blog'@'localhost' with max_user_connections 2;

Query OK, 0 rows affected (0.00 sec)

5、要想将所有账户当前的记数重设为零，可以执行FLUSH USER_RESOURCES语句。还可以通过重载授权表来重设记数。

mysql> flush user_resources;