On Tue, 10 Dec 2024 at 6:32 PM, Andrey M. Borodin <x4...@yandex-team.ru> wrote:
> > > > On 10 Dec 2024, at 15:39, Yura Sokolov <y.soko...@postgrespro.ru> wrote: > > > > It is not critical bug, since it doesn't hurt correctness just > performance. In worst case only one bank will be used. > > Ugh... yeah. IMO the problem is that we do not have protection that > rejects values that are not power of 2. > If other values given system operates as if there are 2^(popcount(n)-1) > banks. So if we just round down value to nearest power of 2 - we will help > incorrectly configured systems to use proper amount of memory and keep > performance of properly configured systems. +1 > > IMO doing modulo is not necessary. And hash function is pure waste of CPU > cycles. I agree — Dilip >
