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From: Christopher Petrilli <petrilli@gmail.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Vivek Khera <vivek@khera.org>
Cc: pgsql-performance@postgresql.org
Subject: Re: Impact of checkpoint_segments under continual load conditions
Date: Wed, 20 Jul 2005 12:16:26 -0400
Message-ID: <59d991c405072009163b149809@mail.gmail.com> (raw)
In-Reply-To: <59d991c405071907482bb0689b@mail.gmail.com>
References: <59d991c4050717100874c08a86@mail.gmail.com>
	<A50B8A1F-71A1-4F63-A5F4-1AA58F89557D@khera.org>
	<59d991c405071811457ccdd3f1@mail.gmail.com>
	<16394.1121715156@sss.pgh.pa.us>
	<59d991c405071812342e290f57@mail.gmail.com>
	<16794.1121718743@sss.pgh.pa.us>
	<59d991c405071907482bb0689b@mail.gmail.com>

On 7/19/05, Christopher Petrilli <petrilli@gmail.com> wrote:
> It looks like the CVS HEAD is definately "better," but not by a huge
> amount.  The only difference is I wasn't run autovacuum in the
> background (default settings), but I don't think this explains it.
> Here's a graph of the differences and density of behavior:
> 
> http://blog.amber.org/diagrams/pgsql_copy_803_cvs.png
> 
> I can provide the raw data.  Each COPY was 500 rows.  Note that fsync
> is turned off here.  Maybe it'd be more stable with it turned on?

I've updated this with trend-lines.

Chris

-- 
| Christopher Petrilli
| petrilli@gmail.com



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