Re: First set of OSDL Shared Mem scalability results, some - Mailing list pgsql-performance

From Greg Stark
Subject Re: First set of OSDL Shared Mem scalability results, some
Date
Msg-id 87sm8i3p4f.fsf@stark.xeocode.com
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In response to Re: First set of OSDL Shared Mem scalability results, some  (Jan Wieck <JanWieck@Yahoo.com>)
Responses Re: First set of OSDL Shared Mem scalability results, some
List pgsql-performance
Jan Wieck <JanWieck@Yahoo.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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