On Thu, Dec 27, 2018 at 10:25:47PM +0300, neslişah demirci wrote: > Have this explain analyze output : > > *https://explain.depesz.com/s/Pra8a <https://explain.depesz.com/s/Pra8a>* On Sat, Dec 29, 2018 at 07:58:28PM +1300, David Rowley wrote: > On Sat, 29 Dec 2018 at 04:32, Justin Pryzby <pryzby@xxxxxxxxxxxxx> wrote: > > I think the solution is to upgrade (at least) to PG10 and CREATE STATISTICS > > (dependencies). > > Unfortunately, I don't think that'll help this situation. Extended > statistics are currently only handled for base quals, not join quals. > See dependency_is_compatible_clause(). Right, understand. Corrrect me if I'm wrong though, but I think the first major misestimate is in the scan, not the join: |Index Scan using product_content_recommendation_main2_recommended_content_id_idx on product_content_recommendation_main2 prm (cost=0.57..2,031.03 rows=345 width=8) (actual time=0.098..68.314 rows=3,347 loops=1) |Index Cond: (recommended_content_id = 3371132) |Filter: (version = 1) |Rows Removed by Filter: 2708 Justin
