On Sun, Apr 6, 2025 at 4:15 PM Andres Freund <and...@anarazel.de> wrote: > > I think we should consider increasing BAS_BULKREAD TO something like > Min(256, io_combine_limit * (effective_io_concurrency + 1))
Do you mean Max? If so, this basically makes sense to me. Overall, I think even though the ring is about reusing buffers, we have to think about how many IOs that reasonably is -- which this formula does. You mentioned testing with 8MB, did you see some sort of clipp anywhere between 256 and 8MB? > I experimented some whether SYNC_SCAN_REPORT_INTERVAL should be increased, and > couldn't come up with any benefits. It seems to hurt fairly quickly. So, how will you deal with it when the BAS_BULKREAD ring is bigger? - Melanie
