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

help / color / mirror / Atom feed
From: Andrus <kobruleht2@hot.ee>
To: Alvaro Herrera <alvherre@commandprompt.com>
Cc: Richard Huxton <dev@archonet.com>
Cc: PFC <lists@peufeu.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Hash join on int takes 8..114 seconds
Date: Fri, 21 Nov 2008 21:45:11 +0200
Message-ID: <A44943E272DF48CC9BC306C513387020@andrusnotebook> (raw)
In-Reply-To: <20081121191646.GH5210@alvh.no-ip.org>
References: <gg1sv3$27fr$1@news.hub.org>
	<49253FE1.3070706@archonet.com>
	<0205611B528C4C2CBA99AFC64E57D6E8@andrusnotebook>
	<op.ukw669uvcigqcu@soyouz>
	<75A918DFCF25470FAF96B3FE3D25A38B@andrusnotebook>
	<4926E2B2.9050202@archonet.com>
	<8A78204AA6D44C04B053E6412B244E13@andrusnotebook>
	<op.ukzdioivcigqcu@soyouz>
	<8D7F64CF7F614E13AC554D6CF86F39B2@andrusnotebook>
	<20081121191646.GH5210@alvh.no-ip.org>

Alvaro,

> Are you really using vacuum_cost_delay=2000?  If so, therein lies your
> problem.  That's a silly value to use for that variable.  Useful values
> are in the 20-40 range probably, or maybe 10-100 being extremely
> generous.

Thank you.
My 8.1.4 postgresql.conf does not contain such option. So vacuum_cost_delay 
is off probably.
Since doc does not recommend any value, I planned to use 2000

Will value of 30 allow other clients to work when VACUUM FULL is running ?

Uncommented relevant values in postgresql.conf file are:

shared_buffers = 15000
work_mem = 512
maintenance_work_mem = 131072
fsync = on
effective_cache_size= 70000
log_min_duration_statement= 30000

Andrus. 




view thread (41+ messages)  latest in thread

Message-ID: <A44943E272DF48CC9BC306C513387020@andrusnotebook>
Permalink:  ../A44943E272DF48CC9BC306C513387020@andrusnotebook/
Also on:    postgresql.org/message-id/A44943E272DF48CC9BC306C513387020@andrusnotebook

 · 

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: kobruleht2@hot.ee, alvherre@commandprompt.com, dev@archonet.com, lists@peufeu.com
  Subject: Re: Hash join on int takes 8..114 seconds
  In-Reply-To: <A44943E272DF48CC9BC306C513387020@andrusnotebook>

* 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