Thanks for the links, I actually applied the second one on my own, without much success. Right now, I'm looking at a server with no swapping, normal memory usage, low processor usage, no IOwait, but serving HTTP requests at the speed of a dead snail nailed to an ice cube.
I'll try to install the cache plugin as soon as I retrieve control over my server.
To get a picture of what's going on, try logging in to your shell and install htop. It's a great little utility that shows you load averages, memory usage (broken down in to used, buffered, and cached memory in real time. Very handy.
I'll try to install the cache plugin as soon as I retrieve control over my server.