On Wed, Jun 17, 2020 at 09:00:23PM +0000, PG Bug reporting form wrote:
> I am facing error during upgrade from postgresql -11 to 12.
> can you please suggest what is solution.
As the error message is telling, you need to make the WAL segment
sizes of the old and new clusters match. This can be defined at
server initialization time using initdb with a default of 16MB, so
that's not a bug from us, but something you need to take care of
within your upgrade process.
--
Michael
