From: Richard Huxton <dev@archonet.com>
To: Simon Riggs <simon@2ndquadrant.com>
Cc: Dimitri Fontaine <dfontaine@hi-media.com>
Cc: pgsql-performance@postgresql.org, "Jignesh K. Shah" <J.K.Shah@sun.com>
Cc: Greg Smith <gsmith@gregsmith.com>
Subject: Re: Benchmark Data requested
Date: Tue, 05 Feb 2008 15:59:23 +0000
Message-ID: <47A887DB.3080002@archonet.com> (raw)
In-Reply-To: <1202225207.4252.718.camel@ebony.site>
References: <1202150236.4252.521.camel@ebony.site>
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<47A797E5.4000507@sun.com>
<200802051506.51581.dfontaine@hi-media.com>
<1202221496.4252.680.camel@ebony.site>
<47A87618.1090203@archonet.com>
<1202223268.4252.707.camel@ebony.site>
<47A87B2E.7050205@archonet.com>
<1202225207.4252.718.camel@ebony.site>
Simon Riggs wrote:
> On Tue, 2008-02-05 at 15:05 +0000, Richard Huxton wrote:
>
>>> Only by locking the table, which serializes access, which then slows you
>>> down or at least restricts other options. Plus if you use pg_loader then
>>> you'll find only the first few rows optimized and all the rest not.
>> Hmm - the table-locking requirement is true enough, but why would
>> pg_loader cause problems after the first few rows?
>
> It runs a stream of COPY statements, so only first would be optimized
> with the "empty table optimization".
Ah, if you're allowing multiple commands during the process I can see
how it could get fiddly.
--
Richard Huxton
Archonet Ltd
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To: pgsql-performance@postgresql.org
Cc: dev@archonet.com, simon@2ndquadrant.com, dfontaine@hi-media.com, J.K.Shah@sun.com, gsmith@gregsmith.com
Subject: Re: Benchmark Data requested
In-Reply-To: <47A887DB.3080002@archonet.com>
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