Philip Semanchuk <[email protected]> writes:
> I saw some unexpected behavior that I'm trying to understand. I suspect it
> might be a quirk specific to AWS Aurora and I'd like to confirm that.
> When I restart my local Postgres instance (on my Mac), the values in
> pg_stat_user_tables.n_mod_since_analyze are preserved. In other words, if
> table foo had n_mod_since_analyze=33 before the reboot, it still has
> n_mod_since_analyze=33 after the restart.
> When I restart an AWS Aurora instance, the values in
> pg_stat_user_tables.n_mod_since_analyze all seem to be reset to 0.
> Can anyone confirm (or refute) that the behavior I see on my Mac
> (preservation of these values through a restart) is common & expected
> behavior?
Yeah, in PG those stats would be preserved, at least as long as it's
a clean shutdown.
regards, tom lane
