On Sun, Dec 11, 2022 at 08:48:15PM -0500, Tom Lane wrote: > I think a stats table indexed solely by relfilenode wouldn't be a great > idea, because you'd lose all the stats about a table as soon as you > do vacuum full/cluster/rewriting-alter-table/etc. Can we create two > index structures over the same stats table entries, so you can look > up by either relfilenode or OID? I'm not quite sure how to manage > rewrites, where you transiently have two relfilenodes for "the > same" table ... maybe we could allow multiple pointers to the same > stats entry??
FWIW, I am not sure that I would care much if we were to dropped the stats associated to a relfilenode on a rewrite. In terms of checksum failures, tuples are deformed so if there is one checksum failure a rewrite would just not happen. The potential complexity is not really appealing compared to the implementation simplicity and its gains, and rewrites are lock-heavy so I'd like to think that people avoid them (cough).. -- Michael
signature.asc
Description: PGP signature
