>They seem to run fine for a few hours, but after a while the become
>less and less interested in talking with the rest of the
>world. Typically the first step is that remote login starts to hang,
>but DNS continues to work. Later on DNS stops to work, and your left
>with the not too exciting "ping" service ;-), and eventually the go
>totally catatonic, and power cycle is the only cure. CTRL-ALT-ESC
>doesn't work then, the console looks as an image of a completely happy
>system, it's just that nothing what so ever happens after any known
>combination of keystrokes, including several well known "vulcan death
>grips". ;-)

	what does vmstat -m and/or netstat -m say?

itojun