Re: visibility map corruption

On Tue, Jul  6, 2021 at 03:46:48PM -0700, Peter Geoghegan wrote:
> On Tue, Jul 6, 2021 at 3:30 PM Bruce Momjian <bruce@momjian.us> wrote:
> > Yes, I can, though it seems like a much bigger issue than pg_upgrade.
> > I will be glad to dig into it.
> 
> I'm not sure what you mean by that. Technically this would be an issue
> for any program that uses "pg_resetwal -x" in the way that pg_upgrade
> does, with those same expectations. But isn't pg_upgrade the only
> known program that behaves like that?
> 
> I don't see any reason why this wouldn't be treated as a pg_upgrade
> bug in the release notes, regardless of the exact nature or provenance
> of the issue -- the pg_upgrade framing seems useful because this is a
> practical problem for pg_upgrade users alone. Have I missed something?

My point is that there are a lot internals involved here that are not
part of pg_upgrade, though it probably only affects pg_upgrade.  Anyway,
Bertrand patch seems to have what I need.

-- 
  Bruce Momjian  <bruce@momjian.us>        https://momjian.us
  EDB                                      https://enterprisedb.com

  If only the physical world exists, free will is an illusion.