On Tue, Apr 18, 2023 at 2:43 PM peter plachta <pplachta@xxxxxxxxx> wrote: > I was trying to understand whether there are any known workarounds for random access + index vacuums. Are my vacuum times 'normal' ? Ah, it's not going to help on the old versions you mentioned, but for what it's worth: I remember noticing that I could speed up vacuum of uncorrelated indexes using parallel vacuum (v13), huge_pages=on, maintainance_work_mem=BIG, min_dynamic_shared_memory=BIG (v14), because then the memory that is binary-searched in random order avoids thrashing the TLB.
