Hello,
We're currently in the beginning phases of a project to upgrade our Postgres cluster from 9.6 to a newer version (most likely v12).
This is actually going to be a two part move since we're going to move from a RHEL-backed cluster to an Ubuntu server-backed one.
I was wondering if there are any potential pitfalls we should look out for, particularly considering we're jumping up 4 major version and tossing in an OS change for good measure.
Best Regards,
Kasun Kulathunga