Re: Caching by Postgres

From: Michael Stone <mstone+postgres(at)mathom(dot)us>
To: Josh Berkus <josh(at)agliodbs(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Caching by Postgres
Date: 2005-08-23 20:29:32
Message-ID: 20050823202932.GK8667@mathom.us
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On Tue, Aug 23, 2005 at 12:38:04PM -0700, Josh Berkus wrote:
>which have a clear and measurable effect on performance and are fixable
>without bloating the PG code. Some of these issues (COPY path, context
>switching

Does that include increasing the size of read/write blocks? I've noticed
that with a large enough table it takes a while to do a sequential scan,
even if it's cached; I wonder if the fact that it takes a million
read(2) calls to get through an 8G table is part of that.

Mike Stone

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