This trips up a lot of newbies who have no concept of connection management or scope. I routinely get questions about it in regards to the orm library I wrote,

This trips up a lot of newbies who have no concept of connection management or scope. I routinely get questions about it in regards to the orm library I wrote, which includes a connection pool of course. Another thing to be aware of with postgres is that connections in an error state (for example, due to trying to insert a row that violates a constraint) must be rolled back before they can be recycled.