I'm experiencing a huge load on my server at the moment and I can't figure out why. When I use the 'top' command, there's hundreds of apache processes with the command "aux", but I can't find anything online that tells me what it means. The load is flapping between 50-150, which is a good 50-150 more than it usually is.
Netstat returns hundreds and hundreds of rows like this:
tcp 0 0 xxx.xxx.xxx.xxx:45216 18.104.22.168:80 CLOSE_WAIT 28863/aux
Almost all from 61.155.xxx.xxx (not sure if this is relevant information, but trying to give as much as possible).
The OS is CentOS: release 5.7 Final We just run LAMP stack on it with about 30 websites that don't get much load (or so I thought). I've checked the logs for all of the vHosts but none seem to be getting many/any requests (not nearly enough to cause this trouble). I'm not sure if there are other logs I should be checking?
It started a couple of days ago; no changes made on the server as far as I'm aware.
Does anyone have any ideas for how I can track down what's causing the huge spike in load? Are there other commands/logs that I've missed that might be able to help me track down what the problem is?