> What happens when a transaction fails to either commit or abort as a > result of a serious error? > > That looks like a transaction-in-progress doesn't it? > > Would that prevent VACUUM from doing its work? It should be able to > check the last startup xid to check that isn't the case, but suppose a > backend had exited without taking down the postmaster.
I don't know if this is the case now or not (I imagine it's pretty good at cleaning up at the moment), but if we implemented 2 Phase Commit this logic would need to be removed as transactions need to cross database restarts. ---------------------------(end of broadcast)--------------------------- TIP 8: explain analyze is your friend
