Re: Skip unregistered custom kinds on stats load

On 2025-Oct-21, Michael Paquier wrote:

> The existing implementation is a choice of simplicity, prioritizing
> availability, FWIW, to keep the contents of the on-disk file simpler.

FWIW I don't necessarily agree with what Sami is proposing, but (if I
understand the situation correctly) I think throwing away the whole
contents of stats when a module is removed is the opposite of
availability, as it will lead to autovacuum lacking data and thus bloat
problems. This is of course always problematic after a crash (unless
somebody has fixed this already?) but at least it is supposed to be a
known issue. With these custom stat kind thingies, nobody knows that
this problem exists.

--
Álvaro Herrera PostgreSQL Developer — https://www.EnterpriseDB.com/
"Por suerte hoy explotó el califont porque si no me habría muerto
de aburrido" (Papelucho)