I have the problem with my server, is he overloaded often, he tends to be so that the Server load 0.68 within a dozen or 30 seconds grows up to 50.00 Server load. I can oneself protect before this and as check this ? After restart apache all he works good.
One of the first things that you want to do is call a 'top' command when the load is starting to go up (preferrably not while its very high as the system may not return). At the top of the command (as the name may suggest ) will be all your memory usage details, as well as your CPU usage details. Please output these here.
Also, below these details the system will kindly tell you what processes are using the server the most. Please output this here as well (along with the Mem and CPU figures for that process).
Also, think about if its occuring at a certain time? or its just randomly throughout the day or throughout the week, because updates can cause some problems in software (bugs) and backups are known to increase the load as well. This information should help us get on our way.