Re: When do I Vacuum ?

thanks.

i'm gonna leave it at onece a day and see how it goes.

thanks for answering btw , i was beginning to think this was one of those
questions nobody answered ...

Steve
"Carsten Gerhardt" <carsten.gerhardt@ppi.de> wrote in message
news:3c0bb397$0$188$4d4ebb8e@read.news.de.uu.net...
> Hi Steve,
>
> "Steve Brett" <steve.brett@e-mis.com> wrote
> > 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 do the same on my DB.
>
> > 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 ....
>
> I didn't read the book, but I also read that one vacuum per day would by
> enough. But my DB runs on a P100 with 64MB ram :-( after 20 to 30
> inserts it seems to slow down, so I vacuum once an houre (at main working
time)
> and now I've less problems 8)
>
> HTH
>   Carsten
>