On Mon, 10 Feb 2020, Adrian Klaver wrote:
>> I don't know that the port numbers are required.
> They are not: https://www.postgresql.org/docs/12/pgupgrade.html
> "Obviously, no one should be accessing the clusters during the upgrade.
> pg_upgrade defaults to running servers on port 50432 to avoid unintended
> client connections. You can use the same port number for both clusters
> when doing an upgrade because the old and new clusters will not be running
> at the same time. However, when checking an old running server, the old
> and new port numbers must be different."
Adrian,
As I'm the only user of the databases, and both are shut down, I assumed
specifying port numbers was not needed.
>> Have I missed an option?
> Not a required one. Best way to find out is to run --check.
Good advice; I'll do that.
Thanks,
Rich
