EXPLAIN SELECT
        host,
        count(DISTINCT ip_address) as host_count
FROM analytics_visits
WHERE user_id = '2c182b8f-ad65-4543-8ac9-2c47bb20172d' AND host <> '' AND status >= 200 AND status < 300
GROUP BY host
ORDER BY host_count DESC;
                                                     QUERY PLAN
---------------------------------------------------------------------------------------------------------------------
 Sort  (cost=277960.43..277960.75 rows=128 width=23)
   Sort Key: (count(DISTINCT ip_address)) DESC
   ->  GroupAggregate  (cost=272617.22..277955.95 rows=128 width=23)
         Group Key: host
         ->  Sort  (cost=272617.22..274396.37 rows=711660 width=79)
               Sort Key: host
               ->  Bitmap Heap Scan on analytics_visits  (cost=10039.64..171818.42 rows=711660 width=79)
                     Recheck Cond: (user_id = '2c182b8f-ad65-4543-8ac9-2c47bb20172d'::uuid)
                     Filter: (((host)::text <> ''::text) AND (status >= 200) AND (status < 300))
                     ->  Bitmap Index Scan on analytics_visits_user_id_idx  (cost=0.00..9861.73 rows=876439 width=0)
                           Index Cond: (user_id = '2c182b8f-ad65-4543-8ac9-2c47bb20172d'::uuid)
 JIT:
   Functions: 11
   Options: Inlining false, Optimization false, Expressions true, Deforming true
(14 rows)