On Tue, Jan 19, 2021 at 4:45 PM Peter Geoghegan <p...@bowt.ie> wrote: > BTW, I think that increasing MaxHeapTuplesPerPage will make it > necessary to consider tidbitmap.c. Comments at the top of that file > say that it is assumed that MaxHeapTuplesPerPage is about 256. So > there is a risk of introducing performance regressions affecting > bitmap scans here.
More concretely, WORDS_PER_PAGE increases from 5 on the master branch to 16 with the latest version of the patch series on most platforms (while WORDS_PER_CHUNK is 4 with or without the patches). -- Peter Geoghegan
