| From: | Stephen Frost <sfrost(at)snowman(dot)net> |
|---|---|
| To: | Tatsuo Ishii <ishii(at)postgresql(dot)org> |
| Cc: | girgen(at)FreeBSD(dot)org, pgsql-hackers(at)postgresql(dot)org, robertmhaas(at)gmail(dot)com, ftigeot(at)wolfpond(dot)org |
| Subject: | Re: Perfomance degradation 9.3 (vs 9.2) for FreeBSD |
| Date: | 2014-04-22 00:49:18 |
| Message-ID: | 20140422004918.GD2556@tamriel.snowman.net |
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| Lists: | pgsql-hackers |
* Tatsuo Ishii (ishii(at)postgresql(dot)org) wrote:
> I observe performance degradation with PostgreSQL 9.3 vs 9.2 on Linux
> as well. The hardware is HP DL980G7, 80 cores, 2TB mem, RHEL 6,
> pgbench is used (read only query), scale factor is 1,000 (DB size
> 15GB).
Can you isolate the sysv-vs-mmap patch and see what happens with just
that change..?
> Included is the graph (from PostgreSQL Enterprise Consortium's 2014
> report page 13: https://www.pgecons.org/downloads/43) I see up to 14%
> degration (at 128 concurrent users) comparing with 9.2.
That URL returns 'Forbidden'...
Thanks,
Stephen
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