Apache web server performance
Back in December I noticed problems with timeouts while trying to connect to our website. I could secure shell into the server with no problem. I ran top and noticed no processes running amok and CPU usage was low. There were some httpd Apache server processes running. I could also login to the Plesk control panel. Everything looked ok.
I opened a ticket with our host provider and found out that I needed to learn how to tune my Apache web server.