On Sat, 26 Oct 2019, Adrian Klaver wrote:
Just me, but to keep this from being a 'famous last words' moment I would backup up the new(11.5) instance before proceeding.
Adrian, Okay. That makes good sense. Will do a pg_dumpall on the 11.5 cluster. When I'm actively working on a database I do a nightly dump (datestamped). Thanks, Rich