If you explain to me that the http process on my Cent OS server is responsible for serving websites, you are NOT helpful.
Andreas, so far I am seeing your server does have a good CPU load average which is below 1. Your Resources seem to be processing quite quickly as well. Your memory does appear to be fluctuating but it appears to be from the incoming request which appear to be ‘httpd’ request which are made to Apache on your server. These are usually incoming connections to your websites.