mysql Error 1040 too many connection解決辦法

最近在用mysql的時候，雙擊表忽然出現1040 too many connection的錯誤，看錯誤的意思是鏈接的人數太多了。

當最大鏈接數比較小時，可能會出現「1040 too many connection」錯誤。

一、首先須要重啓MySQL服務，執行命令：

[root@iZ23 ~]# service mysql restart

或者：

[root@iZ23 ~]# service mysqld restart

二、登陸mysql，

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

輸入密碼，回車；

三、登陸成功後執行如下語句查詢當前的最大鏈接數：

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、執行如下語句修改最大鏈接數：

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

好了，再打開表就不會報錯了

 

補充：升級5.7後報錯

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;