| Date: | Thu, 15 Feb 1996 22:33:39 GMT |
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| Reply-To: | "Andrew V. Leventis" <leventis@TUCSON.PRINCETON.EDU> |
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| Sender: | "SAS(r) Discussion" <SAS-L@UGA.CC.UGA.EDU> |
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| From: | "Andrew V. Leventis" <leventis@TUCSON.PRINCETON.EDU> |
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| Organization: | Princeton University |
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| Subject: | Unix Processor Load |
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I'm running SAS jobs on a two processor Sparc 20 and I've got a really dumb
processor load question.
Suppose there are two big jobs running at once--my SAS job
and someone else's job (a STATA job). Suppose then I start
another SAS process. Will it necessarily be the case
that the sum of the processor usage of my two jobs is greater than
the processor usage of the STATA job.
In my previous experience, I have never seen the sum of my two jobs'
processor usage exceed that of the single STATA job.
I seem to recall someone telling me that SAS jobs are often
I/O intensive and that the bottleneck usually happens in I/O
busing.
I know there is some unix processor-prioritizing system whereby
some users are granted higher priority on all their jobs
relative to the jobs of other users. This would not be the
case in our situation.
Thanks in advance for your help in resolving this dispute.
Andy Leventis
leventis@phoenix.princeton.edu
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