Re: When do I Vacuum ?

Steve,
Just to have an answer out there (being no expert); it seems to me that you
have very little traffic on your database, and vacuuming once a day is
probably plenty.
My database has several thousand inserts/edits/deletes per day and I've
found that I don't have significant performance changes if I forget to
vacuum every day.

Thanks,
Peter Darley

-----Original Message-----
From: pgsql-general-owner(at)postgresql(dot)org
[mailto:pgsql-general-owner(at)postgresql(dot)org]On Behalf Of Steve Brett
Sent: Monday, December 03, 2001 7:37 AM
To: pgsql-general(at)postgresql(dot)org
Subject: Re: [GENERAL] When do I Vacuum ?

could someone please post an answer, even if it's just a pointer to
somewhere else ... please ....
:-)

Steve

"Steve Brett" <steve(dot)brett(at)e-mis(dot)com> wrote in message
news:9ufpug$217v$1(at)news(dot)tht(dot)net(dot)(dot)(dot)
> hi,
>
> I've got a DB driven web application which currently has approx 298
inserts
> per day and 540 edits/deletes.
>
> This figure will change daily and currently i have a cron job set up to
> vacuum the database every hour during 'work time':
>
> 0 7-19/1,23 * * * /usr/local/pgsql/bin/vacuumdb -z -d edb
> 30 7-19/4,23 * * * /backup/dumpit
>
> I've also started reading Bruce's book (and what a fine book it is ... :-)
> and noticed that he suggests vacuuming once a day when the db is quiet.
>
> Would this be sufficient ? The database drives a web based
> calendar/appointment booking/reporting system i've written in php and is
> used extensively by 3 departments and has approx 200 people log in each
day.
>
> Needless to say speed it paramount but I've got a sneaky feeling I might
be
> vacuuming too often ....
>
> Many thanks for you help,
>
> Steve
>
>

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