On Thu, Jan 03, 2019 at 12:57:27PM +0000, Abadie Lana wrote: > Main parameters : effective_cache_size : 4GB, shared_buffers 4GB, work_mem 4MB I doubt it will help much, but you should consider increasing work_mem, unless you have many expensive queries running at once. Could you also send the rest of the pg_statistic for that table ? https://wiki.postgresql.org/wiki/Slow_Query_Questions#Statistics:_n_distinct.2C_MCV.2C_histogram SELECT (SELECT sum(x) FROM unnest(most_common_freqs) x) frac_MCV, tablename, attname, null_frac, n_distinct, array_length(most_common_vals,1) n_mcv, array_length(histogram_bounds,1) n_hist FROM pg_stats WHERE attname='...' AND tablename='...' ORDER BY 1 DESC;
