MySQL5.7 “Lost connection to MySQL server during query”错误的解决方法

MySQL5.7 “Lost connection to MySQL server during query”错误的解决方法

参考文章：

（1）MySQL5.7 “Lost connection to MySQL server during query”错误的解决方法

（2）https://www.cnblogs.com/zsh-blogs/p/12312472.html

备忘一下。