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在老东家工作的时候，有一次用户突然投诉说db很慢，我nload查看时发现网络
流量很大，按照经验可能是mysql服务器受到攻击！
当时的情况见附件：
按照正常的操作应该是
>show processlist;
找到奇怪的连接（进程），然后kill掉它！
但我在kill的时候却遇到一个奇怪的问题，提示找不到该进程！大概过了10几分钟机器就恢复正常了！
我认为这种情况大量的出现是mysql服务器遭到攻击所致！
老外的解释见下图
关于--skip-name-resolve有一个博客解释的很清楚：
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