explain.depesz.com

PostgreSQL's explain analyze made readable

Result: 5Fvv

Settings
# exclusive inclusive rows x rows loops node
1. 0.007 1,682.184 ↑ 1.0 51 1

Limit (cost=305,957.49..305,957.62 rows=51 width=188) (actual time=1,682.175..1,682.184 rows=51 loops=1)

2.          

CTE outfits

3. 35.181 1,271.951 ↓ 1.4 98,877 1

Unique (cost=191,848.55..194,425.27 rows=70,894 width=33) (actual time=1,075.798..1,271.951 rows=98,877 loops=1)

4. 367.325 1,236.770 ↑ 1.0 500,017 1

Sort (cost=191,848.55..193,136.91 rows=515,344 width=33) (actual time=1,075.797..1,236.770 rows=500,017 loops=1)

  • Sort Key: outfit.id_user_app, (COALESCE(outfit_ranking_temp_a.star_count_at_week, 0)) DESC, (COALESCE(outfit_ranking_temp_a.outfit_post_datetime, '1970-07-16 00:00:00'::timestamp without time zone)) DESC
  • Sort Method: external merge Disk: 20496kB
5. 378.744 869.445 ↑ 1.0 500,017 1

Hash Right Join (cost=61,204.37..128,860.33 rows=515,344 width=33) (actual time=293.951..869.445 rows=500,017 loops=1)

  • Hash Cond: (outfit_ranking_temp_a.id_outfit = outfit.id_outfit)
6. 197.293 197.293 ↑ 1.0 900,000 1

Seq Scan on outfit_ranking_temp_a (cost=0.00..47,959.94 rows=900,094 width=16) (actual time=0.008..197.293 rows=900,000 loops=1)

7. 89.579 293.408 ↑ 1.0 500,017 1

Hash (cost=51,742.57..51,742.57 rows=515,344 width=17) (actual time=293.408..293.408 rows=500,017 loops=1)

  • Buckets: 65536 Batches: 16 Memory Usage: 1768kB
8. 203.829 203.829 ↑ 1.0 500,017 1

Seq Scan on outfit (cost=0.00..51,742.57 rows=515,344 width=17) (actual time=0.048..203.829 rows=500,017 loops=1)

  • Filter: ((NOT private_flag) AND (deleted_at IS NULL))
  • Rows Removed by Filter: 499983
9. 19.502 1,682.177 ↑ 695.0 51 1

Sort (cost=111,532.22..111,620.84 rows=35,447 width=188) (actual time=1,682.173..1,682.177 rows=51 loops=1)

  • Sort Key: user_ranking_temp_a.follower_count_at_week DESC, user_ranking_temp_a.outfit_star_count_at_week DESC, (COALESCE(user_ranking_temp_a.outfit_post_updated_at, '1970-07-16 00:00:00'::timestamp without time zone)) DESC
  • Sort Method: top-N heapsort Memory: 40kB
10. 47.575 1,662.675 ↓ 2.5 88,883 1

Nested Loop (cost=7,159.49..110,349.64 rows=35,447 width=188) (actual time=1,334.658..1,662.675 rows=88,883 loops=1)

11. 31.584 1,417.350 ↓ 2.8 98,875 1

Merge Join (cost=7,159.07..87,751.59 rows=35,447 width=125) (actual time=1,334.581..1,417.350 rows=98,875 loops=1)

  • Merge Cond: (user_app.id_user_app = outfits.id_user_app)
12. 33.508 33.514 ↑ 5.0 99,999 1

Index Scan using user_app_pkey on user_app (cost=29.48..78,661.98 rows=500,431 width=117) (actual time=0.016..33.514 rows=99,999 loops=1)

  • Filter: ((deleted_at IS NULL) AND (NOT (hashed SubPlan 2)))
  • Rows Removed by Filter: 2
13.          

SubPlan (for Index Scan)

14. 0.006 0.006 ↓ 0.0 0 1

Seq Scan on user_block (cost=0.00..29.05 rows=1 width=4) (actual time=0.006..0.006 rows=0 loops=1)

  • Filter: ((deleted_at IS NULL) AND ((id_block_from = 22) OR (id_block_to = 22)))
  • Rows Removed by Filter: 1
15. 55.987 1,352.252 ↓ 1.4 98,877 1

Sort (cost=7,129.59..7,306.82 rows=70,894 width=8) (actual time=1,334.553..1,352.252 rows=98,877 loops=1)

  • Sort Key: outfits.id_user_app
  • Sort Method: external sort Disk: 2128kB
16. 1,296.265 1,296.265 ↓ 1.4 98,877 1

CTE Scan on outfits (cost=0.00..1,417.88 rows=70,894 width=8) (actual time=1,075.799..1,296.265 rows=98,877 loops=1)

17. 197.750 197.750 ↑ 1.0 1 98,875

Index Scan using user_ranking_temp_a_id_user_app_key on user_ranking_temp_a (cost=0.42..0.63 rows=1 width=71) (actual time=0.002..0.002 rows=1 loops=98,875)

  • Index Cond: (id_user_app = user_app.id_user_app)
Planning time : 0.549 ms
Execution time : 1,687.881 ms