What makes a Postgres DBA?

Hullo List,

Following up on a recent thread
(http://archives.postgresql.org/pgsql-general/2007-11/msg00064.php) ...

Next question and one that I'm not sure how to phrase: how does one
become a Postgres-savvy* DBA? Just by working with it as a developer
and then moving "up the ranks"? (i.e working with larger, more active
setups/datasets?) There's the training options listed on
http://www.postgresql.org/about/eventarchive, but I'm personally
skeptical at just how much one can retain from a 1-to-5 day course.

My question is not from a certification standpoint; rather it stems from
an actual-understanding standpoint and "what do I need to able to do to
be able to honestly say that 'I am a Postgres DBA' on my resume" standpoint.

(I'm not actually planning to become a DBA; I'm just curious.)

Thanks,

Kevin

* Am I assuming too much already by not defining what a DBA is in general?