Thomas Munro <thomas(dot)munro(at)gmail(dot)com> writes:
> Huh, idiacanthus failed showing vacuum_count 0, in select_parallel.
> So ... the VACUUM command somehow skipped those tables?
No, because the reltuples counts are correct. I think what we're
looking at there is the stats collector dropping a packet that
told it about vacuum activity.
I'm surprised that we saw such a failure so quickly. I'd always
figured that the collector mechanism, while it's designed to be
unreliable, is only a little bit unreliable. Maybe it's more
than a little bit.
regards, tom lane