Take a look at dbsize in the contrib directory of the source
distribution - it's a function you add to your DB to get the size of
databases. I don't know how the RPMs handle the contrib stuff, but it
might be available without compiling it yourself.
Nicer than the other ways...
Jeff Davis writes:
> I would just like to know how to determine the size of a database. The
> directories inside the data directory are numerical, so I can't associate
> them with a particular database or table.
>
> I would basically just like to create reports so I can determine how fast the
> disk usage is increasing.