mysql常用解决方案
1、按客户端 IP 分组,看哪个客户端的链接数最多
select client_ip,count(client_ip) as client_num from (select substring_index(host,':' ,1) as client_ip from information_schema.processlist ) as connect_info group by client_ip order by client_num desc;2.查看正在执行的线程,并按 Time 倒排序,看看有没有执行时间特别长的线程
select * from information_schema.processlist where Command != 'Sleep' order by Time desc;\
3、找出所有执行时间超过 5 分钟的线程,拼凑出 kill 语句,方便后面查杀 (此处 5分钟 可根据自己的需要调整SQL标红处)
select concat('kill ', id, ';') from information_schema.processlist where Command != 'Sleep' and Time > 300 order by Time desc;
4.查询线程及相关信息
show full processlist

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