>>>>> "Tom" == Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:
Tom> Hm, buildfarm results suggest this test is not entirely stable:
I see it and will work on it.
Tom> I have not looked very closely, but I'm suspicious that the test
Tom> case depends on no autovacuum transactions running concurrently
Tom> with it. Disabling autovac on the table itself is not enough to
Tom> control whether global xmin is being held back by some other
Tom> autovac transaction somewhere.
Aren't vacuum transactions ignored for that? vacuum_set_xid_limits is
certainly passing ignoreVacuum=true to GetOldestXmin.
--
Andrew.