Eric Haszlakiewicz <erh(at)swapsimple(dot)com> writes:
> I just spent a couple of days trying to figure out why I couldn't start
> two servers on the same port, even though I was configuring separate
> listen_address values.
That's already documented not to work, and not for any hidden
implementation reason: you'd have a conflict on the Unix-domain socket
name.
regards, tom lane