connections to databases

[eluser]sakcret[/eluser]
According i understand, codeigniter handles connections to databases, but i was reading about the parameter pconnect, that allow a persistent connection if state is true, what happens if change to false,What makes in this case codeigniter.

i´m novice in codeigniter... This confusion arises when you connect 2 databases, if I deactivate pconnect as I manage the connection between them