explain.depesz.com

PostgreSQL's explain analyze made readable

Result: dZwl

Settings
# exclusive inclusive rows x rows loops node
1. 0.239 194.693 ↓ 319.0 319 1

GroupAggregate (cost=18,626.44..18,626.46 rows=1 width=16) (actual time=194.392..194.693 rows=319 loops=1)

  • Group Key: label_links.label_id, (date(merge_requests.created_at))
2. 0.592 194.454 ↓ 1,219.0 1,219 1

Sort (cost=18,626.44..18,626.44 rows=1 width=12) (actual time=194.387..194.454 rows=1,219 loops=1)

  • Sort Key: label_links.label_id, (date(merge_requests.created_at))
  • Sort Method: quicksort Memory: 106kB
3. 0.965 193.862 ↓ 1,219.0 1,219 1

Nested Loop Left Join (cost=1,266.77..18,626.43 rows=1 width=12) (actual time=12.531..193.862 rows=1,219 loops=1)

  • Filter: ((project_features.merge_requests_access_level IS NULL) OR (project_features.merge_requests_access_level = ANY ('{20,30}'::integer[])) OR ((project_features.merge_requests_access_level = 10) AND (alternatives: SubPlan 3 or hashed SubPlan 4)))
4. 0.189 190.459 ↓ 1,219.0 1,219 1

Nested Loop (cost=1,266.33..18,622.33 rows=1 width=20) (actual time=12.505..190.459 rows=1,219 loops=1)

5. 0.659 144.028 ↓ 20.8 5,138 1

Nested Loop (cost=1,265.77..18,417.87 rows=247 width=16) (actual time=12.360..144.028 rows=5,138 loops=1)

6. 0.102 5.807 ↑ 1.9 606 1

Nested Loop (cost=1,265.21..12,148.44 rows=1,175 width=4) (actual time=0.757..5.807 rows=606 loops=1)

7. 0.049 0.700 ↑ 2.0 65 1

HashAggregate (cost=1,264.77..1,266.08 rows=131 width=4) (actual time=0.676..0.700 rows=65 loops=1)

  • Group Key: namespaces.id
8. 0.651 0.651 ↑ 2.0 65 1

CTE Scan on base_and_descendants namespaces (cost=1,260.52..1,263.14 rows=131 width=4) (actual time=0.028..0.651 rows=65 loops=1)

9.          

CTE base_and_descendants

10. 0.122 0.586 ↑ 2.0 65 1

Recursive Union (cost=0.43..1,260.52 rows=131 width=322) (actual time=0.026..0.586 rows=65 loops=1)

11. 0.019 0.019 ↑ 1.0 1 1

Index Scan using namespaces_pkey on namespaces namespaces_1 (cost=0.43..3.45 rows=1 width=322) (actual time=0.018..0.019 rows=1 loops=1)

  • Index Cond: (id = 9970)
  • Filter: ((type)::text = 'Group'::text)
12. 0.050 0.445 ↑ 1.0 13 5

Nested Loop (cost=0.43..125.44 rows=13 width=322) (actual time=0.013..0.089 rows=13 loops=5)

13. 0.005 0.005 ↓ 1.3 13 5

WorkTable Scan on base_and_descendants (cost=0.00..0.20 rows=10 width=4) (actual time=0.000..0.001 rows=13 loops=5)

14. 0.390 0.390 ↑ 1.0 1 65

Index Scan using index_namespaces_on_parent_id_and_id on namespaces namespaces_2 (cost=0.43..12.51 rows=1 width=322) (actual time=0.004..0.006 rows=1 loops=65)

  • Index Cond: (parent_id = base_and_descendants.id)
  • Filter: ((type)::text = 'Group'::text)
15. 2.581 5.005 ↑ 1.0 9 65

Index Scan using index_projects_on_namespace_id on projects (cost=0.43..82.98 rows=9 width=8) (actual time=0.012..0.077 rows=9 loops=65)

  • Index Cond: (namespace_id = namespaces.id)
  • Filter: ((alternatives: SubPlan 1 or hashed SubPlan 2) OR (visibility_level = ANY ('{10,20}'::integer[])))
16.          

SubPlan (forIndex Scan)

17. 2.424 2.424 ↑ 1.0 1 606

Index Only Scan using index_project_authorizations_on_user_id_project_id_access_level on project_authorizations (cost=0.56..3.59 rows=1 width=0) (actual time=0.004..0.004 rows=1 loops=606)

  • Index Cond: ((user_id = 4156052) AND (project_id = projects.id) AND (access_level >= 20))
  • Heap Fetches: 252
18. 0.000 0.000 ↓ 0.0 0

Index Only Scan using index_project_authorizations_on_user_id_project_id_access_level on project_authorizations project_authorizations_1 (cost=0.56..608.06 rows=2,038 width=4) (never executed)

  • Index Cond: ((user_id = 4156052) AND (access_level >= 20))
  • Heap Fetches: 0
19. 137.562 137.562 ↑ 1.6 8 606

Index Scan using index_merge_requests_on_target_project_id_and_iid on merge_requests (cost=0.56..5.21 rows=13 width=16) (actual time=0.116..0.227 rows=8 loops=606)

  • Index Cond: (target_project_id = projects.id)
  • Filter: ((created_at <= '2018-08-01 00:00:00+00'::timestamp with time zone) AND (created_at >= '2018-05-01 00:00:00+00'::timestamp with time zone))
  • Rows Removed by Filter: 102
20. 46.242 46.242 ↓ 0.0 0 5,138

Index Scan using index_label_links_on_target_id_and_target_type on label_links (cost=0.56..0.82 rows=1 width=8) (actual time=0.008..0.009 rows=0 loops=5,138)

  • Index Cond: ((target_id = merge_requests.id) AND ((target_type)::text = 'MergeRequest'::text))
  • Filter: (label_id = ANY ('{2731248,10230929,4116705,2492649,2278648,2779806}'::integer[]))
  • Rows Removed by Filter: 2
21. 2.438 2.438 ↑ 1.0 1 1,219

Index Scan using index_project_features_on_project_id on project_features (cost=0.43..0.49 rows=1 width=8) (actual time=0.002..0.002 rows=1 loops=1,219)

  • Index Cond: (projects.id = project_id)
22.          

SubPlan (forNested Loop Left Join)

23. 0.000 0.000 ↓ 0.0 0

Index Only Scan using index_project_authorizations_on_user_id_project_id_access_level on project_authorizations project_authorizations_2 (cost=0.56..3.59 rows=1 width=0) (never executed)

  • Index Cond: ((user_id = 4156052) AND (project_id = projects.id) AND (access_level >= 20))
  • Heap Fetches: 0
24. 0.000 0.000 ↓ 0.0 0

Index Only Scan using index_project_authorizations_on_user_id_project_id_access_level on project_authorizations project_authorizations_3 (cost=0.56..608.06 rows=2,038 width=4) (never executed)

  • Index Cond: ((user_id = 4156052) AND (access_level >= 20))
  • Heap Fetches: 0
Planning time : 2.850 ms
Execution time : 194.933 ms