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

help / color / mirror / Atom feed
From: Ragnar <gnari@hive.is>
To: Sven Clement <sven@dsign.lu>
Cc: pgsql-performance@postgresql.org
Subject: Re: Performance problems with large telemetric datasets on 7.4.2
Date: Mon, 06 Aug 2007 09:50:25 +0000
Message-ID: <1186393825.5778.368.camel@localhost.localdomain> (raw)
In-Reply-To: <881035ea0708060010u1bbb4b58r57bdf6f51b12f7d9@mail.gmail.com>
References: <881035ea0708030652r37b25a86g61e88e1f5e95eab2@mail.gmail.com>
	<1186150836.19184.194.camel@archimedes>
	<881035ea0708030857s621af020r4d3d7b994e2ca9a3@mail.gmail.com>
	<46B39A77.8050105@sprocks.gotdns.com>
	<4770.1186180449@sss.pgh.pa.us>
	<881035ea0708041303h4ea256b3q4b40c5291f8cd3b7@mail.gmail.com>
	<46B5F5C7.1070901@enterprisedb.com>
	<881035ea0708060010u1bbb4b58r57bdf6f51b12f7d9@mail.gmail.com>

On mán, 2007-08-06 at 00:10 -0700, Sven Clement wrote:
> 
> 
> 2007/8/5, Heikki Linnakangas <heikki@enterprisedb.com>:
>         
>         I don't remember a bug like that. Where did you read that
>         from?
>         
>         --
>           Heikki Linnakangas
>           EnterpriseDB   http://www.enterprisedb.com
> 
> Partially I found that one in the PostgreSQL Documentation for the
> 7.x.x versions under the command REINDEX where they claim that you
> should run a reindex under certain circumstances and for my
> comprehension this says that with some access pattern (as ours (major
> writes / one big delete per day)) the index may be corrupted or
> otherwise not really useful. 

you are probably talking about index bloat, not corruption.

when that happens, the index consumes more space that needed,
and its effectivity is reduced, but it is not corrupted and does
not cause wrong results.

i believe this is a lot less common now than in the 7.x days

gnari





view thread (14+ messages)  latest in thread

Message-ID: <1186393825.5778.368.camel@localhost.localdomain>
Permalink:  ../1186393825.5778.368.camel@localhost.localdomain/
Also on:    postgresql.org/message-id/1186393825.5778.368.camel@localhost.localdomain

 · 

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: gnari@hive.is, sven@dsign.lu
  Subject: Re: Performance problems with large telemetric datasets on 7.4.2
  In-Reply-To: <1186393825.5778.368.camel@localhost.localdomain>

* 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