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From: Gauri Kanekar <meetgaurikanekar@gmail.com>
To: Pavan Deolasee <pavan.deolasee@gmail.com>
Cc: Greg Smith <gsmith@gregsmith.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Replication Syatem
Date: Tue, 29 Apr 2008 18:42:40 +0530
Message-ID: <7e4ba9550804290612v30ef053bj6a7c2fe5600aba27@mail.gmail.com> (raw)
In-Reply-To: <2e78013d0804290609k3bd2aa94q8c6b1c9763e2355a@mail.gmail.com>
References: <7e4ba9550804280638ie81dc23w472785c83cd38fcf@mail.gmail.com>
	<a2de01dd0804280658t68ac22dsf182d304a94de5a2@mail.gmail.com>
	<7e4ba9550804280705q43c51e66l104a5ff9272bbd4d@mail.gmail.com>
	<20080428162243.GN2970@commandprompt.com>
	<7e4ba9550804282246p73c62fc6y5e7cb7dda55a6b50@mail.gmail.com>
	<Pine.GSO.4.64.0804290347560.20575@westnet.com>
	<7e4ba9550804290405i4c0d3a57x1640239c9995c13@mail.gmail.com>
	<2e78013d0804290425n402f5e94i90bc7206aeefffdc@mail.gmail.com>
	<7e4ba9550804290559t7948d549j7e506154c0b1ed38@mail.gmail.com>
	<2e78013d0804290609k3bd2aa94q8c6b1c9763e2355a@mail.gmail.com>

Thats how our updates works.
We usually tend to touch the same row many times a day.

~ Gauri

On Tue, Apr 29, 2008 at 6:39 PM, Pavan Deolasee <pavan.deolasee@gmail.com>
wrote:

> On Tue, Apr 29, 2008 at 6:29 PM, Gauri Kanekar
> <meetgaurikanekar@gmail.com> wrote:
> >
> >
> > Found that the size increased gradually. Is HOT working over here ??
> > Guide me if im doing something wrong.
> >
>
> You have chosen a bad case for HOT. Since you are repeatedly updating
> the same set of rows, the dead space created in the first step is the
> blocks which are not touched in the subsequent updates. Is this a real
> scenario or are you just testing ? If its just for testing, I would
> suggest updating different sets of rows in each step and then check.
>
> Thanks,
> Pavan
>
>
>
> --
> Pavan Deolasee
> EnterpriseDB http://www.enterprisedb.com
>



-- 
Regards
Gauri

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