Re: [PERFORM] optimizing query - Mailing list pgsql-general
From | Chantal Ackermann |
---|---|
Subject | Re: [PERFORM] optimizing query |
Date | |
Msg-id | 3E300FD3.3030100@biomax.de Whole thread Raw |
In response to | Re: [PERFORM] optimizing query (Tom Lane <tgl@sss.pgh.pa.us>) |
List | pgsql-general |
hi Stephan, hi Tom, sort_mem was at its default: 1024. I increased it, and the query takes even longer (~ 36 secs). I tried two different values: 4096 and 8192, this last time I reduced the shared_buffers to 25600 (--> ~ 37 secs). Another point is: after a vacuum, the cost would slightly increase. would it help to cluster the index? but as I am using several indexes I find it difficult to decide on which index to cluster. (I paste the output from vacuum full verbose analyze) Thanks! Chantal ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ INFO: --Relation public.disease_occurrences_puid-- INFO: Pages 2079: Changed 0, reaped 0, Empty 0, New 0; Tup 471915: Vac 0, Keep/VTL 0/0, UnUsed 0, MinLen 32, MaxLen 32; Re-using: Free/Avail. Space 648/648; EndEmpty/Avail. Pages 0/1. CPU 0.02s/0.05u sec elapsed 0.07 sec. INFO: Index disease_occpd_puid_i: Pages 1036; Tuples 471915. CPU 0.00s/0.03u sec elapsed 0.03 sec. INFO: Index disease_id_puid_uni: Pages 1297; Tuples 471915. CPU 0.03s/0.05u sec elapsed 0.23 sec. INFO: Rel disease_occurrences_puid: Pages: 2079 --> 2079; Tuple(s) moved: 0. CPU 0.00s/0.00u sec elapsed 0.00 sec. INFO: Analyzing public.disease_occurrences_puid INFO: --Relation public.gene_occurrences_puid-- INFO: Pages 1495: Changed 0, reaped 0, Empty 0, New 0; Tup 339347: Vac 0, Keep/VTL 0/0, UnUsed 0, MinLen 32, MaxLen 32; Re-using: Free/Avail. Space 648/648; EndEmpty/Avail. Pages 0/1. CPU 0.01s/0.04u sec elapsed 0.05 sec. INFO: Index gene_occpd_puid_i: Pages 746; Tuples 339347. CPU 0.01s/0.02u sec elapsed 0.03 sec. INFO: Index gene_id_puid_uni: Pages 934; Tuples 339347. CPU 0.00s/0.02u sec elapsed 0.02 sec. INFO: Rel gene_occurrences_puid: Pages: 1495 --> 1495; Tuple(s) moved: 0. CPU 0.00s/0.00u sec elapsed 0.00 sec. INFO: Analyzing public.gene_occurrences_puid INFO: --Relation public.disease-- INFO: Pages 1522: Changed 0, reaped 0, Empty 0, New 0; Tup 164597: Vac 0, Keep/VTL 0/0, UnUsed 0, MinLen 44, MaxLen 232; Re-using: Free/Avail. Space 56920/38388; EndEmpty/Avail. Pages 0/603. CPU 0.00s/0.04u sec elapsed 0.04 sec. INFO: Index disease_name_i: Pages 1076; Tuples 164597. CPU 0.05s/0.02u sec elapsed 0.18 sec. INFO: Index disease_pkey: Pages 364; Tuples 164597. CPU 0.00s/0.00u sec elapsed 0.03 sec. INFO: Index disease_uni: Pages 1168; Tuples 164597. CPU 0.08s/0.04u sec elapsed 0.22 sec. INFO: Rel disease: Pages: 1522 --> 1521; Tuple(s) moved: 75. CPU 0.00s/0.03u sec elapsed 0.04 sec. INFO: Index disease_name_i: Pages 1077; Tuples 164597: Deleted 75. CPU 0.00s/0.03u sec elapsed 0.03 sec. INFO: Index disease_pkey: Pages 364; Tuples 164597: Deleted 75. CPU 0.01s/0.02u sec elapsed 0.02 sec. INFO: Index disease_uni: Pages 1168; Tuples 164597: Deleted 75. CPU 0.00s/0.03u sec elapsed 0.03 sec. INFO: --Relation pg_toast.pg_toast_7114632-- INFO: Pages 0: Changed 0, reaped 0, Empty 0, New 0; Tup 0: Vac 0, Keep/VTL 0/0, UnUsed 0, MinLen 0, MaxLen 0; Re-using: Free/Avail. Space 0/0; EndEmpty/Avail. Pages 0/0. CPU 0.00s/0.00u sec elapsed 0.00 sec. INFO: Index pg_toast_7114632_index: Pages 1; Tuples 0. CPU 0.00s/0.00u sec elapsed 0.01 sec. INFO: Analyzing public.disease INFO: --Relation public.gene-- INFO: Pages 1566: Changed 0, reaped 0, Empty 0, New 0; Tup 218085: Vac 0, Keep/VTL 0/0, UnUsed 0, MinLen 44, MaxLen 348; Re-using: Free/Avail. Space 48692/25408; EndEmpty/Avail. Pages 0/365. CPU 0.01s/0.04u sec elapsed 0.04 sec. INFO: Index gene_pkey: Pages 481; Tuples 218085. CPU 0.00s/0.01u sec elapsed 0.01 sec. INFO: Index gene_uni: Pages 1038; Tuples 218085. CPU 0.04s/0.01u sec elapsed 0.19 sec. INFO: Index gene_name_uni: Pages 917; Tuples 218085. CPU 0.06s/0.00u sec elapsed 0.15 sec. INFO: Rel gene: Pages: 1566 --> 1564; Tuple(s) moved: 230. CPU 0.01s/0.06u sec elapsed 0.11 sec. INFO: Index gene_pkey: Pages 482; Tuples 218085: Deleted 230. CPU 0.00s/0.03u sec elapsed 0.02 sec. INFO: Index gene_uni: Pages 1041; Tuples 218085: Deleted 230. CPU 0.00s/0.04u sec elapsed 0.03 sec. INFO: Index gene_name_uni: Pages 918; Tuples 218085: Deleted 230. CPU 0.00s/0.04u sec elapsed 0.03 sec. INFO: --Relation pg_toast.pg_toast_7114653-- INFO: Pages 0: Changed 0, reaped 0, Empty 0, New 0; Tup 0: Vac 0, Keep/VTL 0/0, UnUsed 0, MinLen 0, MaxLen 0; Re-using: Free/Avail. Space 0/0; EndEmpty/Avail. Pages 0/0. CPU 0.00s/0.00u sec elapsed 0.00 sec. INFO: Index pg_toast_7114653_index: Pages 1; Tuples 0. CPU 0.00s/0.00u sec elapsed 0.01 sec. INFO: Analyzing public.gene ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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