[Zope] What's the default database connection status at Zope startup?

I have different Z PyGreSQL database connection objects. What will be the default connection status when I'll start Zope (at boot process). Should the connections be opened manually? If yes, is there a "startup folder" like object? Are they opened by Zope when a client access a Z SQL method at the first time? The connections are opened just one for the Zope server or one per client? I'm asking those questions because I intend to build an Intranet with 20-30 users that will heavily use a PostgreSQL server. I have searched the ZSQL documentation and didn't find any clue. Maybe that kind of questions would find a better place in a FAQ. Best regards, -- Constantin Teodorescu FLEX Consulting Braila, ROMANIA