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

help / color / mirror / Atom feed
From: Craig Ringer <ringerc@ringerc.id.au>
To: Samuel Gendler <sgendler@ideasculptor.com>
To: pgsql-general@postgresql.org <pgsql-general@postgresql.org>
Subject: Re: [PERFORM] The need for clustered indexes to boost TPC-V performance
Date: Fri, 06 Jul 2012 11:02:34 +0800
Message-ID: <4FF6554A.2040303@ringerc.id.au> (raw)
In-Reply-To: <CAEV0TzCi3Bh2xK84dS4V=LOoy-ZeggGCGcUeHf8hnH118pzOzg@mail.gmail.com>
References: <66CE997FB523C04E9749452273184C6C137CB88A86@exch-mbx-113.vmware.com>
	<4FF3D80F.9040408@ringerc.id.au>
	<66CE997FB523C04E9749452273184C6C137CB88CDD@exch-mbx-113.vmware.com>
	<4FF63553.4080300@ringerc.id.au>
	<CAEV0TzAaZCboBk=tEkqPH0wiCGffzECUmghOw7QeTfzSMdLDWQ@mail.gmail.com>
	<CAEV0TzCi3Bh2xK84dS4V=LOoy-ZeggGCGcUeHf8hnH118pzOzg@mail.gmail.com>

On 07/06/2012 09:33 AM, Samuel Gendler wrote:
>
> Some other potential issues - with only 10MB of work_mem, you might be 
> gong to temp space on disk more than you realize.  Explain analyze 
> might reveal that, but only if you happen to pick a query that exceeds 
> work_mem on at least one step.
Rather than hunting blindly with EXPLAIN ANALYZE it's better to just 
turn log_temp_files on and see what's reported.

--
Craig Ringer

view thread (24+ messages)  latest in thread

Message-ID: <4FF6554A.2040303@ringerc.id.au>
Permalink:  ../4FF6554A.2040303@ringerc.id.au/
Also on:    postgresql.org/message-id/4FF6554A.2040303@ringerc.id.au

 · 

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: ringerc@ringerc.id.au, sgendler@ideasculptor.com, pgsql-general@postgresql.org
  Subject: Re: [PERFORM] The need for clustered indexes to boost TPC-V performance
  In-Reply-To: <4FF6554A.2040303@ringerc.id.au>

* 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