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From: Greg Smith <gsmith@gregsmith.com>
To: Pavan Deolasee <pavan.deolasee@gmail.com>
Cc: Alvaro Herrera <alvherre@commandprompt.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: I/O on select count(*)
Date: Wed, 14 May 2008 23:03:37 -0400 (EDT)
Message-ID: <Pine.GSO.4.64.0805142254080.10990@westnet.com> (raw)
In-Reply-To: <2e78013d0805141940x50c3f51u439019e8e592959@mail.gmail.com>
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	<2e78013d0805141940x50c3f51u439019e8e592959@mail.gmail.com>

On Thu, 15 May 2008, Pavan Deolasee wrote:

> I had suggested in the past that whenever we set hint bits for a tuple, 
> we should check all other tuples in the page and set their hint bits too 
> to avoid multiple writes of the same page. I guess the idea got rejected 
> because of lack of benchmarks to prove the benefit.



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