"Angva" <angvaw@gmail.com> wrote:
>
> > clustering also removes the dead tuples.
>
> I have a followup question. What if the set of dead tuples is too big
> and I need to VACUUM FULL, as opposed to VACUUM. (The update size
> varies greatly from day to day.) Will the clustering effectively do a
> VACUUM FULL, or just a VACUUM?
CLUSTER is the equivalent of VACUUM FULL, with the addition that it
orders the data in the table in the order of the index you specify.
VACUUM FULL doesn't follow any particular order for the data.
-Bill