From: Michael Stone <mstone+postgres@mathom.us>
To: pgsql-performance@postgresql.org
Subject: Re: Huge Data sets, simple queries
Date: Wed, 01 Feb 2006 07:15:09 -0500
Message-ID: <20060201121507.GB1293@mathom.us> (raw)
In-Reply-To: <1138766980.14051.24.camel@noodles>
References: <C0050CCE.1B604%llonergan@greenplum.com>
<1138766980.14051.24.camel@noodles>
On Tue, Jan 31, 2006 at 08:09:40PM -0800, Jeffrey W. Baker wrote:
>I think I've proved my point. Software RAID1 read balancing provides
>0%, 300%, 100%, and 100% speedup on 1, 2, 4, and 8 threads,
>respectively. In the presence of random I/O, the results are even
>better.
Umm, the point *was* about single stream performance. I guess you did a
good job of proving it.
>Anyone who thinks they have a single-threaded workload has not yet
>encountered the autovacuum daemon.
On tables where my single stream performance matters you'd better
believe that the autovacuum daemon isn't running.
Mike Stone
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To: pgsql-performance@postgresql.org
Cc: mstone+postgres@mathom.us
Subject: Re: Huge Data sets, simple queries
In-Reply-To: <20060201121507.GB1293@mathom.us>
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