Re: : Performance Improvement Strategy

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From: Greg Smith <greg@2ndQuadrant.com>
To: pgsql-performance@postgresql.org
Subject: Re: : Performance Improvement Strategy
Date: Wed, 21 Sep 2011 13:57:51 -0400
Message-ID: <4E7A259F.9060401@2ndQuadrant.com> (raw)
In-Reply-To: <CAFrxt0hikCw7=O=v-yyQxvHog=kGZeTTTsgAauY8dktEDzOf0A@mail.gmail.com>
References: <CAFrxt0j5UysgEU8hQxZ_mGbdex8Ev-bGdGsdpOGYYSO-jO24Fw@mail.gmail.com>
	<4E79E091.2030401@peak6.com>
	<4E79A6FF0200002500041506@gw.wicourts.gov>
	<CAFrxt0hikCw7=O=v-yyQxvHog=kGZeTTTsgAauY8dktEDzOf0A@mail.gmail.com>

On 09/21/2011 12:13 PM, Venkat Balaji wrote:
> I as a DBA, suggested to perform VACUUM FULL and RE-INDEXING + ANALYZE 
> to ensure that IO performance and Indexing performance would be good


Read http://wiki.postgresql.org/wiki/VACUUM_FULL before you run VACUUM 
FULL.  You probably don't want to do that.  A multi-gigabyte table can 
easily be unavailable for several hours if you execute VACUUM FULL 
against it.  CLUSTER is almost always faster.

-- 
Greg Smith   2ndQuadrant US    greg@2ndQuadrant.com   Baltimore, MD
PostgreSQL Training, Services, and 24x7 Support  www.2ndQuadrant.us

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