Re: First set of OSDL Shared Mem scalability results, some

Greg Stark <gsstark@mit.edu>

From: Greg Stark <gsstark@mit.edu>
To: Jan Wieck <JanWieck@Yahoo.com>
Cc: Greg Stark <gsstark@mit.edu>, Christopher Browne <cbbrowne@acm.org>, pgsql-performance@postgresql.org
Date: 2004-10-14T04:22:40Z
Lists: pgsql-hackers, 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