> How might I determine this?
netstat -a -n
this will list you all current listened ports
you could also try and
telnet localhost 5432
to see if something is listening.
> Would this make a difference when the system is rebooted vs manually
> restarting the server?
when another program is occupying the port, it would probabyl not make much
difference, except if the pgsql service is started before the other tool.
maybe pgsql is already running? ;-)
cheers,
thomas