mysql Error 1040 too many connection解决办法

最近在用mysql的时候，双击表忽然出现1040 too many connection的错误，看错误的意思是链接的人数太多了。

当最大链接数比较小时，可能会出现“1040 too many connection”错误。

一、首先须要重启MySQL服务，执行命令：

[root@iZ23 ~]# service mysql restart

或者：

[root@iZ23 ~]# service mysqld restart

二、登陆mysql，

[root@iZ23 ~]# mysql -uroot -p

输入密码，回车；

三、登陆成功后执行如下语句查询当前的最大链接数：

mysql> select VARIABLE_VALUE from information_schema.GLOBAL_VARIABLES where VARIABLE_NAME='MAX_CONNECTIONS';
+----------------+
| VARIABLE_VALUE |
+----------------+
| 151            |
+----------------+
1 row in set (0.00 sec)

四、执行如下语句修改最大链接数：

mysql> set global max_connections = 3600;
Query OK, 0 rows affected (0.00 sec)

好了，再打开表就不会报错了

 

补充：升级5.7后报错

mysql> select VARIABLE_VALUE from information_schema.GLOBAL_VARIABLES where VARIABLE_NAME='MAX_CONNECTIONS';
ERROR 3167 (HY000): The 'INFORMATION_SCHEMA.GLOBAL_VARIABLES' feature is disabled; see the documentation for 'show_compatibility_56'
mysql> 

mysql>  show variables like '%show_compatibility_56%';
+-----------------------+-------+
| Variable_name         | Value |
+-----------------------+-------+
| show_compatibility_56 | OFF   |
+-----------------------+-------+
1 row in set (0.00 sec)

mysql> 
mysql>  set global show_compatibility_56=on;
Query OK, 0 rows affected (0.00 sec)

mysql> show variables like '%show_compatibility_56%';
+-----------------------+-------+
| Variable_name         | Value |
+-----------------------+-------+
| show_compatibility_56 | ON    |
+-----------------------+-------+
1 row in set (0.00 sec)

mysql>  mysql> select * from information_schema.global_status limit 3;