On Tue, Feb 26, 2019 at 01:54:00PM +0100, kimaidou wrote:
> I manage to avoid the disk sort after performing a VACUUM ANALYSE;
> And with a session work_mem = '250MB'
>
> * SQL http://paste.debian.net/1070207/
> * EXPLAIN https://explain.depesz.com/s/nJ2y
>
> It stills spent 16s
> It seems this kind of query will need better hardware to scale...
Once you've exhausted other ideas, you could consider making that a TEMPORARY
TABLE, and creating an index on it (and analyzing it) and then aggregating.
It'd be several separate queries.
Justin