Re: To Tomas Vondra > I've managed to reproduce it once, running this loop on > 18-as-of-today. It errored out after a few 100 iterations: > > while psql -c 'SELECT COUNT(*) >= 0 AS ok FROM pg_shmem_allocations_numa'; do > :; done > > 2025-12-16 11:49:35.982 UTC [621807] myon@postgres ERROR: invalid NUMA node > id outside of allowed range [0, 0]: -2 > 2025-12-16 11:49:35.982 UTC [621807] myon@postgres STATEMENT: SELECT > COUNT(*) >= 0 AS ok FROM pg_shmem_allocations_numa > > That was on the apt.pg.o amd64 build machine while a few things were > just building. Maybe ENOENT "The page is not present" means something > was just swapped out because the machine was under heavy load.
I played a bit more with it. * It seems to trigger only once for a running cluster. The next one needs a restart * If it doesn't trigger within the first 30s, it probably never will * It seems easier to trigger on a system that is under load (I started a few pgmodeler compile runs in parallel (C++)) But none of that answers the "why". Christoph
