| From: | Greg Stark <gsstark(at)mit(dot)edu> |
|---|---|
| To: | Jan Wieck <JanWieck(at)Yahoo(dot)com> |
| Cc: | Greg Stark <gsstark(at)mit(dot)edu>, Christopher Browne <cbbrowne(at)acm(dot)org>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: First set of OSDL Shared Mem scalability results, some |
| Date: | 2004-10-14 04:22:40 |
| Message-ID: | 87sm8i3p4f.fsf@stark.xeocode.com |
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| Lists: | pgsql-hackers pgsql-performance |
Jan Wieck <JanWieck(at)Yahoo(dot)com> writes:
> Which would require that shared memory is not allowed to be swapped out, and
> that is allowed in Linux by default IIRC, not to completely distort the entire
> test.
Well if it's getting swapped out then it's clearly not being used effectively.
There are APIs to bar swapping out pages and the tests could be run without
swap. I suggested it only as an experiment though, there are lots of details
between here and having it be a good configuration for production use.
--
greg
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