explain.depesz.com

PostgreSQL's explain analyze made readable

Result: Zybf

Settings
# exclusive inclusive rows x rows loops node
1. 0.011 523.238 ↑ 1.0 11 1

Limit (cost=23,298.19..23,298.22 rows=11 width=47) (actual time=523.226..523.238 rows=11 loops=1)

2. 0.414 523.227 ↑ 29.4 11 1

Sort (cost=23,298.19..23,299.00 rows=323 width=47) (actual time=523.225..523.227 rows=11 loops=1)

  • Sort Key: smart_tag.last_used DESC, smart_tag.id DESC
  • Sort Method: top-N heapsort Memory: 26kB
3. 5.390 522.813 ↓ 3.5 1,116 1

Hash Join (cost=23,149.87..23,290.99 rows=323 width=47) (actual time=511.247..522.813 rows=1,116 loops=1)

  • Hash Cond: (clip_smart_tag.smart_tag_id = smart_tag.id)
4. 229.975 516.171 ↓ 3.3 19,375 1

HashAggregate (cost=22,719.56..22,777.62 rows=5,806 width=16) (actual time=509.957..516.171 rows=19,375 loops=1)

  • Group Key: clip_smart_tag.smart_tag_id
5. 286.196 286.196 ↑ 1.0 689,036 1

Seq Scan on clip_smart_tag (cost=0.00..20,990.59 rows=691,587 width=16) (actual time=0.008..286.196 rows=689,036 loops=1)

  • Filter: (confidence > '88'::numeric)
  • Rows Removed by Filter: 220,691
6. 0.502 1.252 ↑ 1.0 1,371 1

Hash (cost=413.18..413.18 rows=1,371 width=47) (actual time=1.252..1.252 rows=1,371 loops=1)

  • Buckets: 2,048 Batches: 1 Memory Usage: 128kB
7. 0.614 0.750 ↑ 1.0 1,371 1

Bitmap Heap Scan on smart_tag (cost=87.04..413.18 rows=1,371 width=47) (actual time=0.154..0.750 rows=1,371 loops=1)

  • Recheck Cond: (workspace_id = 'f2be74b6-d027-4fd3-8047-4a2b99cfe6fa'::uuid)
  • Heap Blocks: exact=128
8. 0.136 0.136 ↓ 1.0 1,374 1

Bitmap Index Scan on smart_tag_workspace_id_label_key (cost=0.00..86.69 rows=1,371 width=0) (actual time=0.136..0.136 rows=1,374 loops=1)

  • Index Cond: (workspace_id = 'f2be74b6-d027-4fd3-8047-4a2b99cfe6fa'::uuid)