Date: Sat, 25 Nov 2006 16:35:01 -0800
From: andrew@pillette.com
Message-Id: <200611260035.kAQ0Z1G02487@pillette.com>
Subject: Re: Massive delete of rows, how to proceed?
To: pgsql-performance@postgresql.org
Cc: 
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I don't believe DROP is necessary; use TRUNCATE instead. No need to re-create dependent objects.

"Peter Childs" <peterachilds@gmail.com> wrote ..
> On 24/11/06, Arnau <arnaulist@andromeiberica.com> wrote:
> > Hi all,
> >
> >    I have a table with statistics with more than 15 million rows. I'd
> > like to delete the oldest statistics and this can be about 7 million
> > rows. Which method would you recommend me to do this? I'd be also
> > interested in calculate some kind of statistics about these deleted
> > rows, like how many rows have been deleted for date. I was thinking in
> > creating a function, any recommendations?
> 
> 
> Copy and drop old table. If you delete you will have a massive problem
> with a bloated table and  vacuum will not help unless you expect the
> table to grow to this size regulally otherwise vacuum full will take
> ages.
> 
> Peter.
> 
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