We have got a very busy site that according to Netcraft is the 6713 busiest site on the www. Anyway our
dedicated server would fall over 3 or 4 times a day as soon as people started posting.
So I thought it must be something to do with the last cPanel upgrade to 11.25. I downgraded to 11.24 and tried all sorts of things including getting the techie people to have a look, AlexP and Christiano to no avail, give them their due they tried all sorts of things to try and get the server to behave.
Anyway I had a look on the cPanel forums and someone was having a winge about EAccerlator being full of bugs and causing lots of problems, so I recompiled using EasyApache and binned off EAccerlator. Our server has been fine since I binned it.
The one question I would ask cPanel, Why can you put RC software into your main build that's going to break lots of sites?