tgl@postgresql.org (Tom Lane) writes:
> Log Message:
> -----------
> Tweak order of operations in BitmapHeapNext() to avoid the case of prefetching
> the same page we are nanoseconds away from reading for real. There should be
> something left to do on the current page before we consider issuing a prefetch.
Doesn't this break things if, say, there's precisely one tuple on every page?
You'll keep raising the prefetch_target but never actually prefetch anything.
-- Gregory Stark EnterpriseDB http://www.enterprisedb.com Get trained by Bruce Momjian - ask me about
EnterpriseDB'sPostgreSQL training!
