Re: Guidance Needed for PostgreSQL Upgrade from 12 to 15

> On Nov 19, 2024, at 1:40 PM, Kris Deugau <kdeugau(at)vianet(dot)ca> wrote:
>
> I stand corrected. I hadn't read the docs on pg_upgrade for quite a while, but after reading the last section in https://www.postgresql.org/docs/current/pgupgrade.html:
>
> "If you did not start the new cluster, the old cluster was unmodified except that, when linking started, a .old suffix was appended to $PGDATA/global/pg_control. To reuse the old cluster, remove the .old suffix from $PGDATA/global/pg_control; you can then restart the old cluster."
>
> I see what you mean.
>

There's nothing wrong per se about taking the snapshot before, I was just saving the potential time of re-running pg_upgrade. Heck, take a snapshot before *and* after ;-)