Philip Semanchuk <philip@xxxxxxxxxxxxxxxxxxxxx> 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
