On Wed, Nov 20, 2024 at 11:22 AM Koen De Groote <kdg....@gmail.com> wrote: > Why would that be? It's the exact same data. The install is about 50GB in > size. Is there something wrong with postgres 16, or did some settings > significantly change, that I need to know about? I went over all the > changelogs, nothing stood out as relevant to this, but that might be a lack > of experience on my end.
Parallel vacuum arrived in PostgreSQL 13, and that uses "dynamic shared memory" to share state between workers, and assuming dynamic_shared_memory_type=posix, that means shm_open(), which opens files under /dev/shm on Linux.
