There is a utiliti under contrib/ called oid2name which returns the name of the object 
given its oid. This will probably help you locate which directories correspond to 
which database.


On Sat, 30 Mar 2002, Robert Abbate wrote:

> Greetings to all!
> I have a webhosting company, and I'm trying to be able to use PHP to
> calculate each of my hosting customer's Postgres database disk usage. It
> doesn't seem as easy as MySQL (since MySQL uses the user name to store all
> their database files).
> Does anyone know how I can calculate PostgreSQL disk space usage for each of
> my hosting user accounts?
> It seems I'm going to have to find out how Postgres keeps track of which
> user's database name is and it's corresponding number (so far, I've been
> able to determin that Postges uses numbers instead of names).
> Can anyone give me some insight?
> Thanks!
> Robert
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