explain.depesz.com

PostgreSQL's explain analyze made readable

Result: XuM

Settings
# exclusive inclusive rows x rows loops node
1. 4.479 84.455 ↑ 12.7 299 1

Hash Full Join (cost=2,300.60..3,029.52 rows=3,791 width=136) (actual time=69.961..84.455 rows=299 loops=1)

  • Hash Cond: (block_seek_pos.bidx = block_seek_pos_1.bidx)
  • Filter: ((block_seek_pos.bidx IS NULL) OR (block_seek_pos_1.bidx IS NULL) OR ((block_seek_pos.block_chksum)::text <> (block_seek_pos_1.block_chksum)::text))
  • Rows Removed by Filter: 6,394
2. 5.233 47.509 ↓ 1.8 6,692 1

Hash Join (cost=832.08..1,491.60 rows=3,792 width=101) (actual time=37.469..47.509 rows=6,692 loops=1)

  • Hash Cond: (block_seek_pos.sbid = "ANY_subquery".max)
3. 4.889 4.889 ↑ 1.1 7,169 1

Seq Scan on block_seek_pos (cost=0.00..597.42 rows=7,585 width=101) (actual time=0.050..4.889 rows=7,169 loops=1)

  • Filter: ((fguid)::text = 'ac15c785776ab44bd58a60f99a240515'::text)
  • Rows Removed by Filter: 6,785
4. 1.127 37.387 ↓ 33.5 6,692 1

Hash (cost=829.58..829.58 rows=200 width=8) (actual time=37.387..37.387 rows=6,692 loops=1)

  • Buckets: 8,192 (originally 1024) Batches: 1 (originally 1) Memory Usage: 326kB
5. 3.282 36.260 ↓ 33.5 6,692 1

HashAggregate (cost=827.58..829.58 rows=200 width=8) (actual time=35.157..36.260 rows=6,692 loops=1)

  • Group Key: "ANY_subquery".max
6. 0.536 32.978 ↓ 1.2 6,692 1

Subquery Scan on ANY_subquery (cost=704.19..813.87 rows=5,484 width=8) (actual time=30.740..32.978 rows=6,692 loops=1)

7. 24.839 32.442 ↓ 1.2 6,692 1

HashAggregate (cost=704.19..759.03 rows=5,484 width=16) (actual time=30.739..32.442 rows=6,692 loops=1)

  • Group Key: block_seek_pos_2.bidx
8. 7.603 7.603 ↑ 1.1 6,872 1

Seq Scan on block_seek_pos block_seek_pos_2 (cost=0.00..667.20 rows=7,399 width=16) (actual time=0.010..7.603 rows=6,872 loops=1)

  • Filter: ((schid <= 3) AND (sbid > 0) AND ((fguid)::text = 'ac15c785776ab44bd58a60f99a240515'::text))
  • Rows Removed by Filter: 7,082
9. 4.278 32.467 ↓ 2.1 6,692 1

Hash (cost=1,428.85..1,428.85 rows=3,174 width=101) (actual time=32.467..32.467 rows=6,692 loops=1)

  • Buckets: 8,192 (originally 4096) Batches: 1 (originally 1) Memory Usage: 960kB
10. 5.514 28.189 ↓ 2.1 6,692 1

Hash Join (cost=779.45..1,428.85 rows=3,174 width=101) (actual time=19.587..28.189 rows=6,692 loops=1)

  • Hash Cond: (block_seek_pos_1.sbid = "ANY_subquery_1".max)
11. 4.641 4.641 ↓ 1.1 6,765 1

Seq Scan on block_seek_pos block_seek_pos_1 (cost=0.00..597.42 rows=6,347 width=101) (actual time=1.529..4.641 rows=6,765 loops=1)

  • Filter: ((fguid)::text = '5303ee30dacdde734dec68ede9346d8f'::text)
  • Rows Removed by Filter: 7,189
12. 1.695 18.034 ↓ 33.5 6,692 1

Hash (cost=776.95..776.95 rows=200 width=8) (actual time=18.034..18.034 rows=6,692 loops=1)

  • Buckets: 8,192 (originally 1024) Batches: 1 (originally 1) Memory Usage: 326kB
13. 5.106 16.339 ↓ 33.5 6,692 1

HashAggregate (cost=774.95..776.95 rows=200 width=8) (actual time=14.495..16.339 rows=6,692 loops=1)

  • Group Key: "ANY_subquery_1".max
14. 0.850 11.233 ↓ 1.4 6,692 1

Subquery Scan on ANY_subquery_1 (cost=663.98..762.62 rows=4,932 width=8) (actual time=7.993..11.233 rows=6,692 loops=1)

15. 5.900 10.383 ↓ 1.4 6,692 1

HashAggregate (cost=663.98..713.30 rows=4,932 width=16) (actual time=7.990..10.383 rows=6,692 loops=1)

  • Group Key: block_seek_pos_3.bidx
16. 4.483 4.483 ↓ 1.1 6,763 1

Seq Scan on block_seek_pos block_seek_pos_3 (cost=0.00..632.31 rows=6,334 width=16) (actual time=1.644..4.483 rows=6,763 loops=1)

  • Filter: ((sbid > 0) AND ((fguid)::text = '5303ee30dacdde734dec68ede9346d8f'::text))
  • Rows Removed by Filter: 7,191
Planning time : 0.881 ms
Execution time : 85.617 ms