Re: SHMMAX and shared_bufffers

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Sam Mason <sam(at)samason(dot)me(dot)uk>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: SHMMAX and shared_bufffers
Date: 2008-11-11 19:31:32
Message-ID: 10985.1226431892@sss.pgh.pa.us
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Sam Mason <sam(at)samason(dot)me(dot)uk> writes:
> On Tue, Nov 11, 2008 at 02:17:20PM -0300, Alvaro Herrera wrote:
>> shared_buffers is not the only factor to shared memory, so you need to
>> provide some extra SHMMAX slop.

> what is this "extra slop" needed for?

See table 17-2 here
http://www.postgresql.org/docs/8.3/static/kernel-resources.html#SYSVIPC

regards, tom lane

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