On Sat, Oct 1, 2022 at 9:35 AM Jeff Davis <pgsql@j-davis.com> wrote:
> Doesn't that deal with the case you brought up directly? heap_delete()
> can't get the exclusive lock until VACUUM releases its cleanup lock, at
> which point all-visible will be set. Then heap_delete() should notice
> in line 2509 and then pin the VM buffer. Right?
I now believe that you're right. I don't think that this code was ever
designed to rely on cleanup locks in any way; that was kind of an
accident all along. Even still, I'm not sure how I missed such an
obvious thing. Sorry for the misdirection.
Still, there has to be *some* reason why the bug could repro on 13.
--
Peter Geoghegan
