本地Mysql成功登录，但丢失连接每次运行查询

Question

我有一个mont前安装mysql。我每天使用都没有任何问题。现在，我的mysql很奇怪。我可以登录到MySQL，并一直成功。但有时无法运行查询。

这是unseccessfull查询的示例：

gai@gai-Lenovo-G470 ~ $ mysql -uroot -p 
Enter password: 
Welcome to the MySQL monitor. Commands end with ; or \g. 
Your MySQL connection id is 3 
Server version: 5.5.47-0ubuntu0.14.04.1 (Ubuntu) 

Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved. 

Oracle is a registered trademark of Oracle Corporation and/or its 
affiliates. Other names may be trademarks of their respective 
owners. 

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. 

mysql> use sps; 
Reading table information for completion of table and column names 
You can turn off this feature to get a quicker startup with -A 

Database changed 
mysql> show databases; 
ERROR 2006 (HY000): MySQL server has gone away 
No connection. Trying to reconnect... 
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (111) 
ERROR: 
Can't connect to the server 

mysql> 

我很迷茫。如何解决这个问题呢？

Answer 1

这是一个常见问题，最大的原因通常只是超时问题，在大量空闲时间之后会出现此错误吗？

如果该命令返回的数据量过大，也会导致该问题。

列出了各种原因和修复程序HERE请尝试修复，如果您仍有问题，请告诉我们您已经尝试过的。