Those all look more or less OK (by the way, it's nice to enclose displays like those in CODE - /CODE blocks, easier to read).
Have you looked at top
to see what's going on? Might want to watch that for a while.
Are you getting whacked by attempted break-in's? A useful monitoring tool is ntop
which may already be installed on your system or you can get it your distribution's application site; e.g., yum
or whatever or you can get it at http://www.ntop.org/
shows network usage in a way similar to what top does for processes.
You can also use GKrellM
which provides a visual display of what's going on on a given server (it can be used across a LAN for multiple servers). See http://members.dslextreme.com/users/...m/gkrellm.html
and note that it may already be installed on your server (it is in many distributions). This is a good one for seeing CPU(s) usage, processes graph, disk usage, network usage, memory usage and swap usage (it will also display temperatures and fan information if that's available on your box).
Use one or more of these tools to see what's eating cycles, memory, disk or whatever.
You might want to post system specs -- what's the platform, what's the distribution, what's the hardware, etc.
Hope this helps some.