High Load Average, and High Idle Time?

From: Gary P Carr (gcarr@lanl.gov)
Date: Fri Jun 03 2005 - 18:55:49 EDT


We are running a Blade 2500 with six Sun 19" LCD heads running from
3xXVR-100 dual port graphics cards.

I am consistently seeing high load averages on prstat, 0.75-1.50. But the
cpu usage is quite low. Using "se infotool.se" for example, I am seeing
user times around 10-20%, system time 2-3%, and wait time < 1%. This seems
to agree with what I see from prstat, ie, total process cpu usage of maybe
10-20%.

Any ideas about why I see so many processes on run queue but so little cpu
usage?
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