The question was:
While monitoring the performance of a Sparcstation 10 (SunOS 4.1.3) which
operates as a Sybase/NFS/NIS/DNS server, I observed (using "top") that
we have about 30% user calls and 70% system calls. Various sources state
that under normal conditions these values should really be the other way
round. Is there a way to determine what causes this "abnormal" behaviour?
Killing off processes to see what happens is not an option since this is
a production machine ...
The answer:
Nothing really conclusive, although most of the respondents agreed that the combination of NFS and Sybase would account for the large number of system calls.
Answers came from:
Kevin.Sheehan@uniq.com.au (Kevin Sheehan {Consulting Poster Child})
vmcindoe@tssc.wlg.nec.co.jp (Vance McIndoe)
Glenn.Satchell@uniq.com.au (Glenn Satchell - Uniq Professional Services)
John Rosenberg <jcr@bgumby.bwh.harvard.edu>
Arve Kjoelen <akjoele@ee.siue.edu>
Anchi Zhang <anchi@Starbase.NeoSoft.COM>
Pierre-Etienne Chartier <chartpe@cam.org>
Thanks again for your friendly cooperation!
Eric Maes
UNIX Systems Administrator/DBA, EDS/CSG-Europe
Mail - emm@nl.tpd.eds.com
Tel : +32-(0)3.540.6328
FAX : +32-(0)3.540.6755
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