本地Mysql成功登錄，但丟失連接每次運行查詢

Question

我有一個mont前安裝mysql。我每天使用都沒有任何問題。現在，我的mysql很奇怪。我可以登錄到MySQL，並一直成功。但有時無法運行查詢。

這是unseccessfull查詢的示例：

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。如何解決這個問題呢？

Answer 1

這是一個常見問題，最大的原因通常只是超時問題，在大量空閒時間之後會出現此錯誤嗎？

如果該命令返回的數據量過大，也會導致該問題。

列出了各種原因和修復程序HERE請嘗試修復，如果您仍有問題，請告訴我們您已經嘗試過的。