Re: Shared memory usage in PostgreSQL 9.1

From: Stephen Frost <sfrost(at)snowman(dot)net>
To: Christoph Zwerschke <cito(at)online(dot)de>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: Shared memory usage in PostgreSQL 9.1
Date: 2011-12-04 14:06:23
Message-ID: 20111204140623.GK24234@tamriel.snowman.net
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* Christoph Zwerschke (cito(at)online(dot)de) wrote:
> (Btw, what negative consequences - if any - does it have if I set
> kernel.shmmax higher as necessary, like all available memory? Does
> this limit serve only as a protection against greedy applications?)

Didn't see this get answered... The long-and-short of that there aren't
any negative consequences of having it higher, as I understand it
anyway, except the risk of greedy apps. In some cases, shared memory
can't be swapped out, which makes it a bit more risky than 'regular'
memory getting sucked up by some app.

Thanks,

Stephen

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