From: Patric de Waha <lists@p-dw.com>
To: pgsql-performance@postgresql.org
Subject: Vacuum full considered useful ;)
Date: Sat, 14 Jul 2007 17:50:39 +0200
Message-ID: <4698F0CF.7000602@p-dw.com> (raw)
Hi,
Something I'd like to share.
I switched to postgres about 4 months ago.
The perfomance after a while got worse.
I posted a message here, where the result was that my IO was the
problem.
I run vacuum every night. I never used vacuum full because it is not
explicitly recommended and I read somewhere in the archives a mail that
the consistency of the db suffered after a vacuum full run.
Yesterday I switched from 8.1 to 8.2. So I needed to dump the dbase
and reimport it. The dbase after 4 months of running without "vacuum
full"
reached 60 gigabyte of diskspace. Now after a fresh import it only
has 5 gigabyte!
No wonder, I got IO problems with such a fragmentation.
For people not very familiar with postgres especially those coming
from mysql,
i'd recommend paying attention to this.
regards,
patric de waha
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Subject: Re: Vacuum full considered useful ;)
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