explain.depesz.com

PostgreSQL's explain analyze made readable

Result: Dtza

Settings
# exclusive inclusive rows x rows loops node
1. 206.413 253.897 ↓ 5.2 890,723 1

Hash Join (cost=4,490.44..7,423.81 rows=172,780 width=91) (actual time=27.313..253.897 rows=890,723 loops=1)

  • Hash Cond: (post_to_tag_link_1.tag_id = tag.id)
2. 15.367 43.395 ↑ 1.0 32,633 1

Hash Join (cost=4,385.07..5,305.10 rows=32,633 width=4) (actual time=23.211..43.395 rows=32,633 loops=1)

  • Hash Cond: (post_to_tag_link_1.post_id = post.id)
3. 5.147 5.147 ↑ 1.0 32,633 1

Seq Scan on post_to_tag_link post_to_tag_link_1 (cost=0.00..471.33 rows=32,633 width=8) (actual time=0.015..5.147 rows=32,633 loops=1)

4. 9.160 22.881 ↑ 1.0 24,492 1

Hash (cost=4,078.92..4,078.92 rows=24,492 width=4) (actual time=22.881..22.881 rows=24,492 loops=1)

  • Buckets: 32768 Batches: 1 Memory Usage: 1118kB
5. 13.721 13.721 ↑ 1.0 24,492 1

Seq Scan on post (cost=0.00..4,078.92 rows=24,492 width=4) (actual time=0.010..13.721 rows=24,492 loops=1)

6. 0.926 4.089 ↓ 1.1 1,318 1

Hash (cost=90.55..90.55 rows=1,186 width=99) (actual time=4.089..4.089 rows=1,318 loops=1)

  • Buckets: 2048 Batches: 1 Memory Usage: 196kB
7. 0.703 3.163 ↓ 1.1 1,318 1

Hash Join (cost=40.07..90.55 rows=1,186 width=99) (actual time=1.136..3.163 rows=1,318 loops=1)

  • Hash Cond: (card_to_tag_link_1.tag_id = tag.id)
8. 0.886 2.310 ↓ 1.1 1,318 1

Hash Join (cost=30.03..64.20 rows=1,186 width=95) (actual time=0.980..2.310 rows=1,318 loops=1)

  • Hash Cond: (card_to_tag_link_1.card_id = card.id)
9. 0.470 0.470 ↓ 1.1 1,318 1

Seq Scan on card_to_tag_link card_to_tag_link_1 (cost=0.00..17.86 rows=1,186 width=8) (actual time=0.016..0.470 rows=1,318 loops=1)

10. 0.461 0.954 ↑ 1.0 757 1

Hash (cost=20.57..20.57 rows=757 width=91) (actual time=0.954..0.954 rows=757 loops=1)

  • Buckets: 1024 Batches: 1 Memory Usage: 104kB
11. 0.493 0.493 ↑ 1.0 757 1

Seq Scan on card (cost=0.00..20.57 rows=757 width=91) (actual time=0.057..0.493 rows=757 loops=1)

12. 0.060 0.150 ↑ 1.0 224 1

Hash (cost=7.24..7.24 rows=224 width=4) (actual time=0.149..0.150 rows=224 loops=1)

  • Buckets: 1024 Batches: 1 Memory Usage: 16kB
13. 0.090 0.090 ↑ 1.0 224 1

Seq Scan on tag (cost=0.00..7.24 rows=224 width=4) (actual time=0.015..0.090 rows=224 loops=1)