From: Michael Stone <mstone+postgres@mathom.us>
To: Luke Lonergan <llonergan@greenplum.com>
Cc: pgsql-hackers@postgresql.org
Cc: pgsql-performance@postgresql.org
Subject: Re: [HACKERS] A Better External Sort?
Date: Thu, 06 Oct 2005 05:49:34 -0400
Message-ID: <20051006094934.GB17398@mathom.us> (raw)
In-Reply-To: <BF69B617.10B72%llonergan@greenplum.com>
References: <20051005153349.GZ2241@mathom.us>
<BF69B617.10B72%llonergan@greenplum.com>
On Wed, Oct 05, 2005 at 04:55:51PM -0700, Luke Lonergan wrote:
>You've proven my point completely. This process is bottlenecked in the CPU.
>The only way to improve it would be to optimize the system (libc) functions
>like "fread" where it is spending most of it's time.
Or to optimize its IO handling to be more efficient. (E.g., use larger
blocks to reduce the number of syscalls.)
Mike Stone
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To: pgsql-performance@postgresql.org
Cc: mstone+postgres@mathom.us, llonergan@greenplum.com, pgsql-hackers@postgresql.org
Subject: Re: [HACKERS] A Better External Sort?
In-Reply-To: <20051006094934.GB17398@mathom.us>
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