I am encountering a strange thing, at everyday 4:00 GMT ~ 4:30 GMT around, my server will be gin to have high loading, and then everything (http, ssh) cannot be done, because all resources (cpu time) are used out.
I try to figure out why, but cannot have an efficient solution for that.
I check all cront-job, but none was running at that time.
Then I try to TOP before server gets high-loaded. The only thing I can find out is that MySQL daemon uses 99% of CPU time, and then http/ssh can go no-where.
If I stop httpd, and then restart it, then server will be back to normal. But I have to do that everyday.
It seems there is some program running regularly at that time, and consume all CPU resource. The server will be back to normal at 5:30GMT or 6:00GMT then.
Can anyone give me some suggestions how to find out why?
I try to figure out why, but cannot have an efficient solution for that.
I check all cront-job, but none was running at that time.
Then I try to TOP before server gets high-loaded. The only thing I can find out is that MySQL daemon uses 99% of CPU time, and then http/ssh can go no-where.
If I stop httpd, and then restart it, then server will be back to normal. But I have to do that everyday.
It seems there is some program running regularly at that time, and consume all CPU resource. The server will be back to normal at 5:30GMT or 6:00GMT then.
Can anyone give me some suggestions how to find out why?