Hello,
We have also seen this issue ourselves and are actively working on it. We do not have a definite proposed solution or
fullRCA yet, but we have managed to narrow down the cause to stale values of relfrozenxid in the relcache for shared
relations.
We are in the process of coming up with a repro as well.
A proposed workaround to this issue is to delete global/pg_internal.init. That will allow a vacuum of the shared
relationto proceed.
Thanks,
Yi Wen Wong
