explain.depesz.com

PostgreSQL's explain analyze made readable

Result: Xj12

Settings
# exclusive inclusive rows x rows loops node
1. 4.251 97.126 ↑ 12.7 299 1

Hash Full Join (cost=2,300.60..3,029.52 rows=3,791 width=136) (actual time=83.845..97.126 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. 4.941 61.079 ↓ 1.8 6,692 1

Hash Join (cost=832.08..1,491.60 rows=3,792 width=101) (actual time=52.003..61.079 rows=6,692 loops=1)

  • Hash Cond: (block_seek_pos.sbid = "ANY_subquery".max)
3. 4.232 4.232 ↑ 1.1 7,169 1

Seq Scan on block_seek_pos (cost=0.00..597.42 rows=7,585 width=101) (actual time=0.060..4.232 rows=7,169 loops=1)

  • Filter: ((fguid)::text = 'ac15c785776ab44bd58a60f99a240515'::text)
  • Rows Removed by Filter: 6,785
4. 1.657 51.906 ↓ 33.5 6,692 1

Hash (cost=829.58..829.58 rows=200 width=8) (actual time=51.906..51.906 rows=6,692 loops=1)

  • Buckets: 8,192 (originally 1024) Batches: 1 (originally 1) Memory Usage: 326kB
5. 4.039 50.249 ↓ 33.5 6,692 1

HashAggregate (cost=827.58..829.58 rows=200 width=8) (actual time=48.704..50.249 rows=6,692 loops=1)

  • Group Key: "ANY_subquery".max
6. 0.829 46.210 ↓ 1.2 6,692 1

Subquery Scan on ANY_subquery (cost=704.19..813.87 rows=5,484 width=8) (actual time=43.432..46.210 rows=6,692 loops=1)

7. 36.080 45.381 ↓ 1.2 6,692 1

HashAggregate (cost=704.19..759.03 rows=5,484 width=16) (actual time=43.430..45.381 rows=6,692 loops=1)

  • Group Key: block_seek_pos_2.bidx
8. 9.301 9.301 ↑ 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=0.015..9.301 rows=6,872 loops=1)

  • Filter: ((schid <= 3) AND (sbid > 0) AND ((fguid)::text = 'ac15c785776ab44bd58a60f99a240515'::text))
  • Rows Removed by Filter: 7,082
9. 4.442 31.796 ↓ 2.1 6,692 1

Hash (cost=1,428.85..1,428.85 rows=3,174 width=101) (actual time=31.796..31.796 rows=6,692 loops=1)

  • Buckets: 8,192 (originally 4096) Batches: 1 (originally 1) Memory Usage: 960kB
10. 5.930 27.354 ↓ 2.1 6,692 1

Hash Join (cost=779.45..1,428.85 rows=3,174 width=101) (actual time=18.094..27.354 rows=6,692 loops=1)

  • Hash Cond: (block_seek_pos_1.sbid = "ANY_subquery_1".max)
11. 6.290 6.290 ↓ 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=2.929..6.290 rows=6,765 loops=1)

  • Filter: ((fguid)::text = '5303ee30dacdde734dec68ede9346d8f'::text)
  • Rows Removed by Filter: 7,189
12. 1.416 15.134 ↓ 33.5 6,692 1

Hash (cost=776.95..776.95 rows=200 width=8) (actual time=15.134..15.134 rows=6,692 loops=1)

  • Buckets: 8,192 (originally 1024) Batches: 1 (originally 1) Memory Usage: 326kB
13. 3.844 13.718 ↓ 33.5 6,692 1

HashAggregate (cost=774.95..776.95 rows=200 width=8) (actual time=12.466..13.718 rows=6,692 loops=1)

  • Group Key: "ANY_subquery_1".max
14. 0.566 9.874 ↓ 1.4 6,692 1

Subquery Scan on ANY_subquery_1 (cost=663.98..762.62 rows=4,932 width=8) (actual time=7.757..9.874 rows=6,692 loops=1)

15. 4.811 9.308 ↓ 1.4 6,692 1

HashAggregate (cost=663.98..713.30 rows=4,932 width=16) (actual time=7.755..9.308 rows=6,692 loops=1)

  • Group Key: block_seek_pos_3.bidx
16. 4.497 4.497 ↓ 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=1.883..4.497 rows=6,763 loops=1)

  • Filter: ((sbid > 0) AND ((fguid)::text = '5303ee30dacdde734dec68ede9346d8f'::text))
  • Rows Removed by Filter: 7,191
Planning time : 1.994 ms
Execution time : 97.975 ms