On Mon, Feb 25, 2019 at 2:44 AM kimaidou <kimai...@gmail.com> wrote: > I have better results with this version. Basically, I run a first query > only made for aggregation, and then do a JOIN to get other needed data. > > * SQL : http://paste.debian.net/1070007/ > * EXPLAIN: https://explain.depesz.com/s/D0l > > Not really "fast", but I gained 30% >
It still seems that disk sort and everything after that is where the query plan dies. It seems odd that it went to disk if work_mem was already 250MB. Can you allocate more as a test? As an alternative, if this is a frequently needed data, can you aggregate this data and keep a summarized copy updated periodically?
