Repost, edited subject by mistake...
On Monday, May 11, 2020, Tory M Blue <tmblue(at)gmail(dot)com> wrote:
>
> And just to repeat. Same exact hardware, same kernel, nothing more than
> installing the latest postgres12, copying my config files from 9.5 to 12
> and running the pg_upgrade.
>
You’ll want to remove the pg_upgrade from the equation and try v12
David J.