Thank you for that clarification.

What I'm trying to figure out (I'm learning as I go, but I'm running out of time) is whether or not the following scenario is correct (or even a good idea):

A cgi script on a bank of web boxes uses DBI->connect_cache to connect to a dbi proxy, which then uses DBI->connect_cache to a bank of db boxes.

I can't find anything seems to do this, or similar. Thanks for the pointer.