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

help / color / mirror / Atom feed

From: tv@fuzzy.cz
To: Andrus <kobruleht2@hot.ee>
Cc: Tomas Vondra <tv@fuzzy.cz>
Cc: Scott Carey <scott@richrelevance.com>
Cc: PFC <lists@peufeu.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Hash join on int takes 8..114 seconds
Date: Mon, 24 Nov 2008 14:39:24 +0100 (CET)
Message-ID: <60633.89.102.139.23.1227533964.squirrel@sq.gransy.com> (raw)
In-Reply-To: <7395E52430A9420E8248D54726DC634B@andrusnotebook>
References: <gg1sv3$27fr$1@news.hub.org>
	<49253FE1.3070706@archonet.com>
	<0205611B528C4C2CBA99AFC64E57D6E8@andrusnotebook>
	<op.ukw669uvcigqcu@soyouz>
	<75A918DFCF25470FAF96B3FE3D25A38B@andrusnotebook>
	<op.ukze24t0cigqcu@soyouz>
	<E3AFB54F617D47F4BE652E85ECC67153@andrusnotebook>
	<op.uk1nbqcgcigqcu@soyouz>
	<AD6DEEFF0CE54A3982082A2CA7C2F722@andrusnotebook>
	<BDFBB77C9E07BE4A984DAAE981D19F961ACA17D9BB@EXVMBX018-1.exch018.msoutlookonline.net>
	<8F4674DDA1F24158A615BE304697988B@andrusnotebook>
	<4929E9C4.1010706@fuzzy.cz>
	<7395E52430A9420E8248D54726DC634B@andrusnotebook>

>> Given the fact that the performance issues are caused by bloated tables
>> and / or slow I/O subsystem, moving to a similar system won't help I
>> guess.
>
> I have ran VACUUM FULL ANALYZE VERBOSE
> and set MAX_FSM_PAGES = 150000
>
> So there is no any bloat except pg_shdepend indexes which should not
> affect to query speed.

OK, what was the number of unused pointer items in the VACUUM output?

The query performance is still the same as when the tables were bloated?
What are the outputs of iostat/vmstat/dstat/top when running the query?

regards
Tomas

view thread (41+ messages)  latest in thread

Message-ID: <60633.89.102.139.23.1227533964.squirrel@sq.gransy.com>
Permalink:  ../60633.89.102.139.23.1227533964.squirrel@sq.gransy.com/
Also on:    postgresql.org/message-id/60633.89.102.139.23.1227533964.squirrel@sq.gransy.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: tv@fuzzy.cz, kobruleht2@hot.ee, scott@richrelevance.com, lists@peufeu.com
  Subject: Re: Hash join on int takes 8..114 seconds
  In-Reply-To: <60633.89.102.139.23.1227533964.squirrel@sq.gransy.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