Hi, On 2022-08-17 15:02:28 +0900, Michael Paquier wrote: > On Wed, Aug 17, 2022 at 11:15:28AM +0530, Pavan Deolasee wrote: > > I notice that pgstat_shutdown_hook() is registered as a before-shmem-exit > > callback. The callback is responsible for detaching from the pgstat shared > > memory segment. But looks like other parts of the system still expect it to > > be available during later stages of proc exit. > > > > It's not clear to me if pgstat shutdown should happen later or code that > > gets executed later in the cycle should not try to use pgstat. It's also > > entirely possible that my usage of SharedFileSet is completely wrong. If > > that's the case, please let me know the mistake in the usage. > > That's visibly an issue with shared memory and the stats. I have > added an open item. Andres?
I don't think there's anything reasonably done about this for 15, as explained upthread. We need a big redesign of the shutdown sequence at some point, but ... Greetings, Andres Freund