Hi,
We have an Alpha 2100 4/275 with 2 processors and 1 gigabyte of memory. We
have over 14,000 accounts and between 100 and 250 users typically logged in.
We are currently running 3.2D-1.
We have noticed that most of the kernel "system" overhead seems to only happen
on CPU 0, as if DU operated as a master/slave system. Recently, our "system"
time on CPU 0 has been running 80-90%, causing load averages to get as
high as 40 or more occasionally. CPU 1 appears to have plenty of extra
cycles during these periods and is being used by 1 or 2 long running jobs.
If we stop the long running (CPU bound) jobs, this still does not free up
CPU 1 to help out with the system load on CPU 0.
Is DU really a master/slave system (I/O and possibly certain other kernel
processing only happening on CPU 0)? If so, will DU 4.0 fix this?
Thanks,
Greg Bell
UNIX Systems Group
Washington State University
Received on Thu Feb 29 1996 - 02:40:12 NZDT