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Re: Auto Vacuum Problem

From: Richard Huxton <dev(at)archonet(dot)com>
To: Gauri Kanekar <meetgaurikanekar(at)gmail(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Auto Vacuum Problem
Date: 2007-01-24 08:54:05
Message-ID: 45B71EAD.7060301@archonet.com (view raw or flat)
Thread:
Lists: pgsql-performance
Gauri Kanekar wrote:
> Hi List,
> 
> When auto vacuum is over the dead tuple are seems to get reduced, but
> physical size of database do not decreases.

It won't necessarily. An ordinary vacuum just keeps track of old rows 
that can be cleared and re-used. A "vacuum full" is needed to compact 
the table.

If you are running a normal vacuum often enough then the size of the 
database should remain about the same (unless you insert more rows of 
course).

-- 
   Richard Huxton
   Archonet Ltd

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