explain.depesz.com

PostgreSQL's explain analyze made readable

Result: 70WE

Settings
# exclusive inclusive rows x rows loops node
1. 10.285 1,881.447 ↑ 3.5 51 1

Subquery Scan on tmp (cost=310,726.02..312,055.29 rows=177 width=180) (actual time=1,820.516..1,881.447 rows=51 loops=1)

  • Filter: ((tmp.rownumber >= 0) AND (tmp.rownumber <= 51))
  • Rows Removed by Filter: 88832
2. 25.575 1,871.162 ↓ 2.5 88,883 1

WindowAgg (cost=310,726.02..311,523.58 rows=35,447 width=196) (actual time=1,820.512..1,871.162 rows=88,883 loops=1)

3.          

CTE outfits

4. 35.396 1,368.224 ↓ 1.4 98,877 1

Unique (cost=191,848.55..194,425.27 rows=70,894 width=33) (actual time=1,165.304..1,368.224 rows=98,877 loops=1)

5. 396.065 1,332.828 ↑ 1.0 500,017 1

Sort (cost=191,848.55..193,136.91 rows=515,344 width=33) (actual time=1,165.303..1,332.828 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
6. 419.406 936.763 ↑ 1.0 500,017 1

Hash Right Join (cost=61,204.37..128,860.33 rows=515,344 width=33) (actual time=312.849..936.763 rows=500,017 loops=1)

  • Hash Cond: (outfit_ranking_temp_a.id_outfit = outfit.id_outfit)
7. 204.988 204.988 ↑ 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..204.988 rows=900,000 loops=1)

8. 94.674 312.369 ↑ 1.0 500,017 1

Hash (cost=51,742.57..51,742.57 rows=515,344 width=17) (actual time=312.369..312.369 rows=500,017 loops=1)

  • Buckets: 65536 Batches: 16 Memory Usage: 1768kB
9. 217.695 217.695 ↑ 1.0 500,017 1

Seq Scan on outfit (cost=0.00..51,742.57 rows=515,344 width=17) (actual time=0.068..217.695 rows=500,017 loops=1)

  • Filter: ((NOT private_flag) AND (deleted_at IS NULL))
  • Rows Removed by Filter: 499983
10. 91.337 1,845.587 ↓ 2.5 88,883 1

Sort (cost=116,300.76..116,389.37 rows=35,447 width=188) (actual time=1,820.507..1,845.587 rows=88,883 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: external merge Disk: 17520kB
11. 42.999 1,754.250 ↓ 2.5 88,883 1

Nested Loop (cost=7,159.49..110,349.64 rows=35,447 width=188) (actual time=1,431.379..1,754.250 rows=88,883 loops=1)

12. 31.630 1,513.501 ↓ 2.8 98,875 1

Merge Join (cost=7,159.07..87,751.59 rows=35,447 width=125) (actual time=1,431.355..1,513.501 rows=98,875 loops=1)

  • Merge Cond: (user_app.id_user_app = outfits.id_user_app)
13. 32.420 32.427 ↑ 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=0.013..32.427 rows=99,999 loops=1)

  • Filter: ((deleted_at IS NULL) AND (NOT (hashed SubPlan 2)))
  • Rows Removed by Filter: 2
14.          

SubPlan (for Index Scan)

15. 0.007 0.007 ↓ 0.0 0 1

Seq Scan on user_block (cost=0.00..29.05 rows=1 width=4) (actual time=0.007..0.007 rows=0 loops=1)

  • Filter: ((deleted_at IS NULL) AND ((id_block_from = 22) OR (id_block_to = 22)))
  • Rows Removed by Filter: 1
16. 56.949 1,449.444 ↓ 1.4 98,877 1

Sort (cost=7,129.59..7,306.82 rows=70,894 width=8) (actual time=1,431.339..1,449.444 rows=98,877 loops=1)

  • Sort Key: outfits.id_user_app
  • Sort Method: external sort Disk: 2128kB
17. 1,392.495 1,392.495 ↓ 1.4 98,877 1

CTE Scan on outfits (cost=0.00..1,417.88 rows=70,894 width=8) (actual time=1,165.305..1,392.495 rows=98,877 loops=1)

18. 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 : 0.581 ms
Execution time : 1,887.572 ms