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Re: Perfomance degradation 9.3 (vs 9.2) for FreeBSD - Mailing list pgsql-hackers

From Stephen Frost
Subject Re: Perfomance degradation 9.3 (vs 9.2) for FreeBSD
Date
Msg-id 20140422004918.GD2556@tamriel.snowman.net
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In response to Re: Perfomance degradation 9.3 (vs 9.2) for FreeBSD  (Tatsuo Ishii <ishii@postgresql.org>)
Responses Re: Perfomance degradation 9.3 (vs 9.2) for FreeBSD  (Tatsuo Ishii <ishii@postgresql.org>)
Re: Perfomance degradation 9.3 (vs 9.2) for FreeBSD  (Andrew Dunstan <andrew@dunslane.net>)
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* Tatsuo Ishii (ishii@postgresql.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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