Re: Need to run CLUSTER to keep performance

Heikki Linnakangas wrote:
>
> If the table is already bloated, a VACUUM won't usually shrink it. It
> only makes the space available for reuse, but a sequential scan still
> needs to go through a lot of pages.
> 
> CLUSTER on the other hand repacks the tuples and gets rid of all the
> unused space on pages. You need to run CLUSTER or VACUUM FULL once to
> shrink the relation, but after that frequent-enough VACUUMs should keep
> the table size down.
> 

Ok, thanks for the advice. We will try this and will come back with more
information.

-- 
 Rafael Martinez, 
 Center for Information Technology Services
 University of Oslo, Norway

 PGP Public Key: http://folk.uio.no/rafael/