Horton

Re: Shared Memory: How to use SYSV rather than MMAP ?

Andres Freund <andres@anarazel.de>

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From: Andres Freund <andres@anarazel.de>
To: pgsql-hackers@lists.postgresql.org,Robert Haas <robertmhaas@gmail.com>,Tom Lane <tgl@sss.pgh.pa.us>
Cc: Thomas Munro <thomas.munro@enterprisedb.com>,"REIX, Tony" <tony.reix@atos.net>,Pg Hackers <pgsql-hackers@postgresql.org>,"EMPEREUR-MOT, SYLVIE" <sylvie.empereur-mot@atos.net>
Date: 2018-12-26T18:25:48Z
Lists: pgsql-hackers 

On December 26, 2018 6:48:31 PM GMT+01:00, Robert Haas <robertmhaas@gmail.com> wrote:
>I disagree.  I think there is a growing body of evidence that
>b0fc0df9364d2d2d17c0162cf3b8b59f6cb09f67 killed performance on many
>types of non-Linux systems.  This is the first report I recall about
>AIX, but there have been previous complaints about some BSD variants.

Exactly. I think we should have added this a few years ago.

Andres
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Commits

  1. Add shared_memory_type GUC.

  2. Dramatically reduce System V shared memory consumption.