On Tue, Jun 08, 2021 at 05:44:15PM -0700, Peter Geoghegan wrote: > On Tue, Jun 8, 2021 at 5:11 PM Tom Lane <t...@sss.pgh.pa.us> wrote: > > I wonder if this is a variant of the problem shown at > > > > https://www.postgresql.org/message-id/2591376.1621196582%40sss.pgh.pa.us > > > > where maybe_needed was visibly quite insane. This value is > > less visibly insane, but it's still wrong. It might be > > interesting to try running this test case with the extra > > assertions I proposed there, to try to narrow down where > > it's going off the rails. > > Oh yeah. Justin didn't say anything about upgrading using pg_upgrade > (just something about upgrading the kernel). > > Did you use pg_upgrade here, Justin?
Yes. The kernel upgrade was going to be my hand-waving dismissal of the issue when I saw someting waiting on a futex. (Since a few years ago Tom had to remind me about an old Linux futex bug which we hit after upgrading to v12 on a customer's server - they like to avoid maintenance at all costs). -- Justin
