explain.depesz.com

PostgreSQL's explain analyze made readable

Result: Ntcj

Settings

Optimization(s) for this plan:

# exclusive inclusive rows x rows loops node
1. 55.784 53,068.555 ↑ 1.3 102 1
→

Gather (cost=1,001.30..2,866,077.20 rows=132 width=4) (actual time=27,474.151..53,068.555 rows=102 loops=1)

  • Output: webchatuse0_.daemon_user_id
  • Workers Planned: 8
  • Workers Launched: 8
  • Buffers: shared hit=957589 read=1864741 dirtied=195
2. 1.067 53,012.771 ↑ 1.5 11 9
→

Nested Loop Anti Join (cost=1.30..2,865,064.00 rows=16 width=4) (actual time=27,087.237..53,012.771 rows=11 loops=9)

  • Output: webchatuse0_.daemon_user_id
  • Buffers: shared hit=957589 read=1864741 dirtied=195
  • Worker 0: actual time=27116.134..53014.468 rows=12 loops=1
  • Buffers: shared hit=106325 read=204096 dirtied=21
  • Worker 1: actual time=27066.528..53010.537 rows=9 loops=1
  • Buffers: shared hit=108594 read=208988 dirtied=23
  • Worker 2: actual time=26913.784..53011.110 rows=12 loops=1
  • Buffers: shared hit=101678 read=202819 dirtied=16
  • Worker 3: actual time=27843.758..53007.805 rows=10 loops=1
  • Buffers: shared hit=105569 read=206307 dirtied=16
  • Worker 4: actual time=27086.030..53015.045 rows=15 loops=1
  • Buffers: shared hit=107349 read=207174 dirtied=23
  • Worker 5: actual time=26922.287..53012.718 rows=9 loops=1
  • Buffers: shared hit=102975 read=207324 dirtied=11
  • Worker 6: actual time=26470.807..53011.830 rows=14 loops=1
  • Buffers: shared hit=102851 read=206463 dirtied=35
  • Worker 7: actual time=26892.651..53012.592 rows=9 loops=1
  • Buffers: shared hit=103299 read=206854 dirtied=15
3. 2.663 53,011.647 ↓ 1.1 18 9
→

Nested Loop Left Join (cost=0.87..2,865,034.97 rows=17 width=8) (actual time=24,716.961..53,011.647 rows=18 loops=9)

  • Output: webchatuse0_.daemon_user_id, dialogset2_.id
  • Buffers: shared hit=956943 read=1864739 dirtied=195
  • Worker 0: actual time=23816.127..53011.934 rows=20 loops=1
  • Buffers: shared hit=106208 read=204095 dirtied=21
  • Worker 1: actual time=26932.469..53009.680 rows=23 loops=1
  • Buffers: shared hit=108508 read=208988 dirtied=23
  • Worker 2: actual time=26913.674..53010.394 rows=14 loops=1
  • Buffers: shared hit=101629 read=202819 dirtied=16
  • Worker 3: actual time=27003.940..53007.022 rows=16 loops=1
  • Buffers: shared hit=105498 read=206307 dirtied=16
  • Worker 4: actual time=26999.520..53012.548 rows=22 loops=1
  • Buffers: shared hit=107271 read=207173 dirtied=23
  • Worker 5: actual time=10416.882..53011.880 rows=16 loops=1
  • Buffers: shared hit=102907 read=207324 dirtied=11
  • Worker 6: actual time=26470.676..53011.118 rows=17 loops=1
  • Buffers: shared hit=102788 read=206463 dirtied=35
  • Worker 7: actual time=26892.635..53011.840 rows=15 loops=1
  • Buffers: shared hit=103249 read=206854 dirtied=15
4. 1.274 53,008.836 ↓ 1.1 18 9
→

Nested Loop Left Join (cost=0.43..2,865,013.31 rows=17 width=17) (actual time=24,716.845..53,008.836 rows=18 loops=9)

  • Output: webchatuse0_.daemon_user_id, client1_.login
  • Inner Unique: true
  • Buffers: shared hit=956142 read=1864736 dirtied=195
  • Worker 0: actual time=23816.039..53008.346 rows=20 loops=1
  • Buffers: shared hit=106093 read=204094 dirtied=21
  • Worker 1: actual time=26932.374..53008.444 rows=23 loops=1
  • Buffers: shared hit=108381 read=208988 dirtied=23
  • Worker 2: actual time=26913.489..53005.182 rows=14 loops=1
  • Buffers: shared hit=101556 read=202819 dirtied=16
  • Worker 3: actual time=27003.845..53005.662 rows=16 loops=1
  • Buffers: shared hit=105429 read=206307 dirtied=16
  • Worker 4: actual time=26999.415..53007.514 rows=22 loops=1
  • Buffers: shared hit=107177 read=207171 dirtied=23
  • Worker 5: actual time=10416.729..53010.814 rows=16 loops=1
  • Buffers: shared hit=102824 read=207324 dirtied=11
  • Worker 6: actual time=26470.487..53010.150 rows=17 loops=1
  • Buffers: shared hit=102721 read=206463 dirtied=35
  • Worker 7: actual time=26892.544..53010.733 rows=15 loops=1
  • Buffers: shared hit=103165 read=206854 dirtied=15
5. 53,007.502 53,007.502 ↓ 1.1 18 9
→

Parallel Seq Scan on public.web_chat_user_data webchatuse0_ (cost=0.00..2,864,968.21 rows=17 width=8) (actual time=24,716.744..53,007.502 rows=18 loops=9)

  • Output: webchatuse0_.daemon_user_id, webchatuse0_.estimated_skill_group, webchatuse0_.is_online, webchatuse0_.client_id, webchatuse0_.user_data, webchatuse0_.updated
  • Filter: ((webchatuse0_.is_online = 1) AND (webchatuse0_.estimated_skill_group = 8))
  • Rows Removed by Filter: 2648094
  • Buffers: shared hit=955487 read=1864734 dirtied=195
  • Worker 0: actual time=23815.935..53004.587 rows=20 loops=1
  • Buffers: shared hit=106014 read=204092 dirtied=21
  • Worker 1: actual time=26932.276..53007.409 rows=23 loops=1
  • Buffers: shared hit=108288 read=208988 dirtied=23
  • Worker 2: actual time=26913.360..53004.187 rows=14 loops=1
  • Buffers: shared hit=101499 read=202819 dirtied=16
  • Worker 3: actual time=27003.771..53004.801 rows=16 loops=1
  • Buffers: shared hit=105364 read=206307 dirtied=16
  • Worker 4: actual time=26999.333..53006.445 rows=22 loops=1
  • Buffers: shared hit=107088 read=207171 dirtied=23
  • Worker 5: actual time=10416.606..53009.871 rows=16 loops=1
  • Buffers: shared hit=102759 read=207324 dirtied=11
  • Worker 6: actual time=26470.349..53009.212 rows=17 loops=1
  • Buffers: shared hit=102651 read=206463 dirtied=35
  • Worker 7: actual time=26892.447..53009.796 rows=15 loops=1
  • Buffers: shared hit=103104 read=206854 dirtied=15
6. 0.060 0.060 ↑ 1.0 1 162
→

Index Scan using msg_clients_id_idx on public.msg_clients client1_ (cost=0.43..2.65 rows=1 width=17) (actual time=0.060..0.060 rows=1 loops=162)

  • Output: client1_.id, client1_.login, client1_.last_client_profile_id
  • Index Cond: (webchatuse0_.client_id = client1_.id)
  • Buffers: shared hit=655 read=2
  • Worker 0: actual time=0.176..0.176 rows=1 loops=20
  • Buffers: shared hit=79 read=2
  • Worker 1: actual time=0.034..0.034 rows=1 loops=23
  • Buffers: shared hit=93
  • Worker 2: actual time=0.053..0.053 rows=1 loops=14
  • Buffers: shared hit=57
  • Worker 3: actual time=0.040..0.040 rows=1 loops=16
  • Buffers: shared hit=65
  • Worker 4: actual time=0.034..0.034 rows=1 loops=22
  • Buffers: shared hit=89
  • Worker 5: actual time=0.043..0.043 rows=1 loops=16
  • Buffers: shared hit=65
  • Worker 6: actual time=0.041..0.041 rows=1 loops=17
  • Buffers: shared hit=70
  • Worker 7: actual time=0.045..0.045 rows=1 loops=15
  • Buffers: shared hit=61
7. 0.148 0.148 ↑ 1.0 1 162
→

Index Scan using msg_dialogs_external_id_idx on public.msg_dialogs dialogset2_ (cost=0.43..1.26 rows=1 width=15) (actual time=0.131..0.148 rows=1 loops=162)

  • Output: dialogset2_.external_id, dialogset2_.id
  • Index Cond: ((client1_.login)::text = (dialogset2_.external_id)::text)
  • Buffers: shared hit=801 read=3
  • Worker 0: actual time=0.100..0.170 rows=1 loops=20
  • Buffers: shared hit=115 read=1
  • Worker 1: actual time=0.040..0.047 rows=1 loops=23
  • Buffers: shared hit=127
  • Worker 2: actual time=0.356..0.363 rows=1 loops=14
  • Buffers: shared hit=73
  • Worker 3: actual time=0.074..0.077 rows=1 loops=16
  • Buffers: shared hit=69
  • Worker 4: actual time=0.188..0.222 rows=1 loops=22
  • Buffers: shared hit=94 read=2
  • Worker 5: actual time=0.052..0.058 rows=1 loops=16
  • Buffers: shared hit=83
  • Worker 6: actual time=0.048..0.049 rows=1 loops=17
  • Buffers: shared hit=67
  • Worker 7: actual time=0.054..0.062 rows=1 loops=15
  • Buffers: shared hit=84
8. 0.057 0.057 ↓ 0.0 0 162
→

Index Scan using msg_appeals_dialog_id_index on public.msg_appeals appeal3_ (cost=0.43..1.64 rows=1 width=4) (actual time=0.057..0.057 rows=0 loops=162)

  • Output: appeal3_.id, appeal3_.dialog_id, appeal3_.date_start, appeal3_.date_end, appeal3_.is_open, appeal3_.processed, appeal3_.rating, appeal3_.answer, appeal3_.active, appeal3_.group_id, appeal3_.sl, appeal3_.bot_state, appeal3_.greeting, appeal3_.chat_by_code
  • Index Cond: (appeal3_.dialog_id = dialogset2_.id)
  • Filter: (appeal3_.is_open = ANY ('{1,2}'::integer[]))
  • Rows Removed by Filter: 1
  • Buffers: shared hit=646 read=2
  • Worker 0: actual time=0.121..0.121 rows=0 loops=20
  • Buffers: shared hit=117 read=1
  • Worker 1: actual time=0.033..0.033 rows=1 loops=23
  • Buffers: shared hit=86
  • Worker 2: actual time=0.044..0.044 rows=0 loops=14
  • Buffers: shared hit=49
  • Worker 3: actual time=0.043..0.043 rows=0 loops=16
  • Buffers: shared hit=71
  • Worker 4: actual time=0.108..0.108 rows=0 loops=22
  • Buffers: shared hit=78 read=1
  • Worker 5: actual time=0.047..0.047 rows=0 loops=16
  • Buffers: shared hit=68
  • Worker 6: actual time=0.036..0.036 rows=0 loops=17
  • Buffers: shared hit=63
  • Worker 7: actual time=0.044..0.044 rows=0 loops=15
  • Buffers: shared hit=50
Planning time : 2.050 ms
Execution time : 53,068.718 ms