On Tue, 21 Mar 2023 at 09:41, David Rowley <dgrowleyml@gmail.com> wrote:
> Because that's being changed in v16, I think it might also be a good
> idea to fix the hit_ratio calculation problem reported by David
> Johnston in [1]. In the attached, I've adjusted David's calculation
> slightly so that we divide by Max(ndistinct, est_cache_entries)
> instead of ndistinct. This saves from overestimating when ndistinct
> is smaller than est_cache_entries. I'd rather fix this now for v16
> than wait until v17 and further adjust the Memoize costing.
I've now pushed this change.
David
