explain.depesz.com

PostgreSQL's explain analyze made readable

Result: eiGt

Settings
# exclusive inclusive rows x rows loops node
1. 10.178 1,838.033 ↑ 3.5 51 1

Subquery Scan on tmp (cost=310,726.02..312,055.29 rows=177 width=180) (actual time=1,779.477..1,838.033 rows=51 loops=1)

  • Filter: ((tmp.rownumber >= 0) AND (tmp.rownumber <= 51))
  • Rows Removed by Filter: 88832
2. 25.275 1,827.855 ↓ 2.5 88,883 1

WindowAgg (cost=310,726.02..311,523.58 rows=35,447 width=196) (actual time=1,779.472..1,827.855 rows=88,883 loops=1)

3.          

CTE outfits

4. 35.284 1,359.305 ↓ 1.4 98,877 1

Unique (cost=191,848.55..194,425.27 rows=70,894 width=33) (actual time=1,157.369..1,359.305 rows=98,877 loops=1)

5. 391.402 1,324.021 ↑ 1.0 500,017 1

Sort (cost=191,848.55..193,136.91 rows=515,344 width=33) (actual time=1,157.368..1,324.021 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. 419.159 932.619 ↑ 1.0 500,017 1

Hash Right Join (cost=61,204.37..128,860.33 rows=515,344 width=33) (actual time=305.242..932.619 rows=500,017 loops=1)

  • Hash Cond: (outfit_ranking_temp_a.id_outfit = outfit.id_outfit)
7. 208.595 208.595 ↑ 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=0.007..208.595 rows=900,000 loops=1)

8. 93.698 304.865 ↑ 1.0 500,017 1

Hash (cost=51,742.57..51,742.57 rows=515,344 width=17) (actual time=304.865..304.865 rows=500,017 loops=1)

  • Buckets: 65536 Batches: 16 Memory Usage: 1768kB
9. 211.167 211.167 ↑ 1.0 500,017 1

Seq Scan on outfit (cost=0.00..51,742.57 rows=515,344 width=17) (actual time=0.044..211.167 rows=500,017 loops=1)

  • Filter: ((NOT private_flag) AND (deleted_at IS NULL))
  • Rows Removed by Filter: 499983
10. 82.254 1,802.580 ↓ 2.5 88,883 1

Sort (cost=116,300.76..116,389.37 rows=35,447 width=188) (actual time=1,779.468..1,802.580 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. 23.008 1,720.326 ↓ 2.5 88,883 1

Nested Loop (cost=7,159.49..110,349.64 rows=35,447 width=188) (actual time=1,421.669..1,720.326 rows=88,883 loops=1)

12. 30.322 1,499.568 ↓ 2.8 98,875 1

Merge Join (cost=7,159.07..87,751.59 rows=35,447 width=125) (actual time=1,421.649..1,499.568 rows=98,875 loops=1)

  • Merge Cond: (user_app.id_user_app = outfits.id_user_app)
13. 30.290 30.296 ↑ 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..30.296 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. 0.006 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
16. 55.316 1,438.950 ↓ 1.4 98,877 1

Sort (cost=7,129.59..7,306.82 rows=70,894 width=8) (actual time=1,421.634..1,438.950 rows=98,877 loops=1)

  • Sort Key: outfits.id_user_app
  • Sort Method: external sort Disk: 2128kB
17. 1,383.634 1,383.634 ↓ 1.4 98,877 1

CTE Scan on outfits (cost=0.00..1,417.88 rows=70,894 width=8) (actual time=1,157.371..1,383.634 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 : 0.458 ms
Execution time : 1,845.217 ms