explain.depesz.com

PostgreSQL's explain analyze made readable

Result: 8bAU : CTE test 4

Settings
# exclusive inclusive rows x rows loops node
1. 1,293.834 77,430.230 ↑ 30.9 52,731 1

GroupAggregate (cost=760,985.85..887,193.75 rows=1,628,489 width=287) (actual time=63,829.885..77,430.230 rows=52,731 loops=1)

  • Group Key: sensornn.dev_id, signature.sig_id, iphdr.ip_src, iphdr.ip_dst, sensornn.cl_id
2.          

CTE sensornn

3. 0.029 0.029 ↑ 1.0 49 1

Seq Scan on sensor (cost=0.00..2.49 rows=49 width=19) (actual time=0.013..0.029 rows=49 loops=1)

  • Filter: ((handler_group_2_shifts IS NOT NULL) OR (handler_group_3_shifts IS NOT NULL) OR (handler_group_4_shifts IS NOT NULL) OR (handler_group_5_shifts IS NOT NULL) OR (handler_group_6_shifts IS NOT NULL) OR (handler_group_7_shifts IS NOT NULL) OR (handler_group_8_shifts IS NOT NULL) OR (handler_group_9_shifts IS NOT NULL) OR (handler_group_10_shifts IS NOT NULL))
4. 36,474.918 76,136.396 ↓ 1.0 1,649,246 1

Sort (cost=760,983.36..765,054.58 rows=1,628,489 width=177) (actual time=63,829.861..76,136.396 rows=1,649,246 loops=1)

  • Sort Key: sensornn.dev_id, signature.sig_id, iphdr.ip_src, iphdr.ip_dst, sensornn.cl_id
  • Sort Method: external merge Disk: 229,648kB
5. 629.289 39,661.478 ↓ 1.0 1,649,246 1

Hash Left Join (cost=109,455.14..303,520.17 rows=1,628,489 width=177) (actual time=1,584.756..39,661.478 rows=1,649,246 loops=1)

  • Hash Cond: ((event.sid = udphdr.sid) AND (event.cid = udphdr.cid))
6. 544.814 39,011.027 ↓ 1.0 1,649,246 1

Hash Left Join (cost=107,939.59..293,455.06 rows=1,628,489 width=169) (actual time=1,563.379..39,011.027 rows=1,649,246 loops=1)

  • Hash Cond: (event.signature = signature.sig_id)
7. 573.027 38,461.883 ↓ 1.0 1,649,246 1

Hash Right Join (cost=107,595.72..288,834.47 rows=1,628,489 width=110) (actual time=1,558.983..38,461.883 rows=1,649,246 loops=1)

  • Hash Cond: (event.sid = sensornn.sid)
8. 14,137.710 37,888.782 ↓ 1.0 1,649,225 1

Hash Left Join (cost=107,594.12..266,441.15 rows=1,628,489 width=68) (actual time=1,558.899..37,888.782 rows=1,649,225 loops=1)

  • Hash Cond: ((event.sid = iphdr.sid) AND (event.cid = iphdr.cid))
9. 5,558.279 22,476.659 ↓ 1.0 1,649,225 1

Hash Left Join (cost=16,326.58..125,097.03 rows=1,628,489 width=44) (actual time=284.087..22,476.659 rows=1,649,225 loops=1)

  • Hash Cond: ((event.sid = tcphdr.sid) AND (event.cid = tcphdr.cid))
10. 16,684.505 16,684.505 ↓ 1.0 1,649,225 1

Seq Scan on event (cost=0.00..72,508.89 rows=1,628,489 width=36) (actual time=49.999..16,684.505 rows=1,649,225 loops=1)

11. 172.365 233.875 ↑ 1.0 386,663 1

Hash (cost=8,260.63..8,260.63 rows=386,663 width=20) (actual time=233.875..233.875 rows=386,663 loops=1)

  • Buckets: 65,536 Batches: 8 Memory Usage: 3,150kB
12. 61.510 61.510 ↑ 1.0 386,663 1

Seq Scan on tcphdr (cost=0.00..8,260.63 rows=386,663 width=20) (actual time=0.010..61.510 rows=386,663 loops=1)

13. 849.568 1,274.413 ↓ 1.0 1,651,372 1

Hash (cost=53,597.62..53,597.62 rows=1,651,262 width=36) (actual time=1,274.412..1,274.413 rows=1,651,372 loops=1)

  • Buckets: 65,536 Batches: 64 Memory Usage: 2,509kB
14. 424.845 424.845 ↓ 1.0 1,651,372 1

Seq Scan on iphdr (cost=0.00..53,597.62 rows=1,651,262 width=36) (actual time=0.024..424.845 rows=1,651,372 loops=1)

15. 0.014 0.074 ↑ 1.0 49 1

Hash (cost=0.98..0.98 rows=49 width=46) (actual time=0.074..0.074 rows=49 loops=1)

  • Buckets: 1,024 Batches: 1 Memory Usage: 11kB
16. 0.060 0.060 ↑ 1.0 49 1

CTE Scan on sensornn (cost=0.00..0.98 rows=49 width=46) (actual time=0.016..0.060 rows=49 loops=1)

17. 2.806 4.330 ↑ 1.0 9,372 1

Hash (cost=226.72..226.72 rows=9,372 width=59) (actual time=4.330..4.330 rows=9,372 loops=1)

  • Buckets: 16,384 Batches: 1 Memory Usage: 999kB
18. 1.524 1.524 ↑ 1.0 9,372 1

Seq Scan on signature (cost=0.00..226.72 rows=9,372 width=59) (actual time=0.010..1.524 rows=9,372 loops=1)

19. 14.170 21.162 ↑ 1.0 46,822 1

Hash (cost=813.22..813.22 rows=46,822 width=20) (actual time=21.161..21.162 rows=46,822 loops=1)

  • Buckets: 65,536 Batches: 1 Memory Usage: 3,073kB
20. 6.992 6.992 ↑ 1.0 46,822 1

Seq Scan on udphdr (cost=0.00..813.22 rows=46,822 width=20) (actual time=0.013..6.992 rows=46,822 loops=1)