I've been running the Apache HTTP server benchmarking tool (ab) on my new Apache server to test performance. I noticed that with a command like the following:
ab -n 100000 -c 1000 http://www.mysite.com/
The CPU is used 100% by the apache2 processes during the testing. When the test concludes, usually with the following error just before the last requests are made:
apr_poll: The timeout specified has expired (70007) Total of 99960 requests completed
the CPU usage remains at 100%, and it's all being consumed by apache.
I am using the worker MPM with and running PHP with mod_fcgid.
Any advice as to why this is or what can be done to stop it would be appreciated.