Re: server won't shutdown

"Ed L." <pgadmin@bluepolka.net> writes:
> I've been seeing the same problem intermittently over the past 2 years
> among ~30 production clusters.

Hm, I suddenly have a theory.  Do you guys use LISTEN/NOTIFY in the
databases that are exhibiting the problem?  Is it possible that the
backends that aren't cooperating have not done anything since they
last received a NOTIFY?  (That would imply that the connected frontend
didn't issue any SQL commands in response to the notification.)

            regards, tom lane