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

help / color / mirror / Atom feed
From: Kevin Grittner <Kevin.Grittner@wicourts.gov>
To: Aaron Guyon <battlemage@gmail.com>
To: pgsql-performance@postgresql.org
Subject: Re: Postgres 8.3, four times slower queries?
Date: Thu, 05 Mar 2009 12:57:20 -0600
Message-ID: <49AFCC30.EE98.0025.0@wicourts.gov> (raw)
In-Reply-To: <f0afbb9b0903050806s2def04b7q95c8f05667623377@mail.gmail.com>
References: <f0afbb9b0903021618w616f1158t84dbf119f0b72c70@mail.gmail.com>
	<2870.1236050632@sss.pgh.pa.us>
	<f0afbb9b0903030931g7b219137n2954cf058d523e52@mail.gmail.com>
	<17797.1236119652@sss.pgh.pa.us>
	<f0afbb9b0903041520u25aae965y6abc15d39644eb5b@mail.gmail.com>
	<f0afbb9b0903041542q55e714c9g154461517f958de6@mail.gmail.com>
	<f0afbb9b0903050806s2def04b7q95c8f05667623377@mail.gmail.com>

>>> Aaron Guyon <battlemage@gmail.com> wrote: 
> 8.3.3: 1195 ms
> 8.2.12: 611 ms
 
Could you send the non-commented lines from the postgresql.conf files
from both installations?
 
If feasible, update to the latest bug-fix version of 8.3.
 
Also, if you haven't already done so, try setting effective_cache_size
= '3GB' and random_page_cost = 2 for the 8.3 database and restart to
see what kind of plan you get.
 
-Kevin



view thread (16+ messages)  latest in thread

Message-ID: <49AFCC30.EE98.0025.0@wicourts.gov>
Permalink:  ../49AFCC30.EE98.0025.0@wicourts.gov/
Also on:    postgresql.org/message-id/49AFCC30.EE98.0025.0@wicourts.gov

 · 

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: Kevin.Grittner@wicourts.gov, battlemage@gmail.com
  Subject: Re: Postgres 8.3, four times slower queries?
  In-Reply-To: <49AFCC30.EE98.0025.0@wicourts.gov>

* 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