Glen Eustace <geustace@godzone.net.nz> writes:
> After an upgrade from 8.0.8 to 8.1.8, I am getting a number of our
> scripts failing with 'connection refused' at around 4:00am, which seems
> to be when the nightly database backup occurs.
"Connection refused" is a kernel-level rejection, and at least in theory
should have nothing to do with what Postgres is doing. Did you do a
kernel update at the same time?
regards, tom lane