On 2023-Oct-17, Rajesh Kumar wrote:
> I have been asked to check table health of specific big table.
>
> What are list of things I have to check?
Install extension pg_visibility and run functions pg_check_frozen and
pg_check_visible on the table. I've seen a couple of cases of
**serious** data recoverability issues that aren't discovered until much
later, caused by pages having been improperly marked all-frozen in some
distant past. I assume it's possible to have pages marked as
all-visible as well, which would cause different issues.
--
Álvaro Herrera PostgreSQL Developer — https://www.EnterpriseDB.com/
"Aprender sin pensar es inútil; pensar sin aprender, peligroso" (Confucio)
