Thank you Uniballer.
Gkontos, I do have swap, but the graph for the swap usage is empty. 0 in, 0 out.
That is one of the reasons I think I might have a problem. though I only use 1.5 GB of RAM and the server has like 8 GB, so why use it right?
As for the I/O, I don't think so, there is a single...