On Sat, May 18, 2024 at 1:00 AM Alexander Lakhin <exclus...@gmail.com> wrote: > I decided to compare v17 vs v16 performance (as I did the last year [1]) > and discovered that v17 loses to v16 in the pg_tpcds (s64da_tpcds) > benchmark, query15 (and several others, but I focused on this one): > Best pg-src-master--.* worse than pg-src-16--.* by 52.2 percents (229.84 > > 151.03): pg_tpcds.query15 > Average pg-src-master--.* worse than pg-src-16--.* by 53.4 percents (234.20 > > 152.64): pg_tpcds.query15 > Please look at the full html report attached in case you're interested. > > (I used my pg-mark tool to measure/analyze performance, but I believe the > same results can be seen without it.)
Will investigate, but if it's easy for you to rerun, does it help if you increase Linux readahead, eg blockdev --setra setting?
