pg.ddx.io  pgsql-performance@postgresql.org mailing list archive  

help / color / mirror / Atom feed

From: Pavan Deolasee <pavan.deolasee@gmail.com>
To: Gauri Kanekar <meetgaurikanekar@gmail.com>
Cc: Greg Smith <gsmith@gregsmith.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Replication Syatem
Date: Tue, 29 Apr 2008 18:39:39 +0530
Message-ID: <2e78013d0804290609k3bd2aa94q8c6b1c9763e2355a@mail.gmail.com> (raw)
In-Reply-To: <7e4ba9550804290559t7948d549j7e506154c0b1ed38@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>

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

view thread (48+ messages)  latest in thread

Message-ID: <2e78013d0804290609k3bd2aa94q8c6b1c9763e2355a@mail.gmail.com>
Permalink:  ../2e78013d0804290609k3bd2aa94q8c6b1c9763e2355a@mail.gmail.com/
Also on:    postgresql.org/message-id/2e78013d0804290609k3bd2aa94q8c6b1c9763e2355a@mail.gmail.com

copy link · copy postgr.es

reply

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: pgsql-performance@postgresql.org
  Cc: pavan.deolasee@gmail.com, meetgaurikanekar@gmail.com, gsmith@gregsmith.com
  Subject: Re: Replication Syatem
  In-Reply-To: <2e78013d0804290609k3bd2aa94q8c6b1c9763e2355a@mail.gmail.com>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox