Bjoern Metzdorf wrote:
> Hi,
>
> I have a 3 GB (fs based) large pgdata directory. I regularly do vacuums
> every 15 minutes and vacuums with analyzing every night.
>
> After dumping the whole db (pg_dump -c db), dropping and creating the db,
> reinserting the dump and vacuuming again, my pgdata directory only contains
> 1 GB. The dump had no errors, all data has been saved and reinserted.
>
> The xlogs/clogs didnt take up 2 GB, so I am wondering what has happened.
>
> Shouldn't the vacuuming take care of this?
>
> A (desired) sideeffect is, that the postmaster runs much faster now. Queries
> get executed much faster.
>
> If I compare the relpages from before and after, I see the difference there
> also.
>
> Any hints?
Have you tried "VACUUM FULL"?
Note that this needs exclusive table access, so run it when usage is low
or (preferrably) during scheduled downtime.
Maybe if you could squeeze this in once a week or so ...
--
Bill Moran
Potential Technologies
http://www.potentialtech.com
