Re: [PATCHES] Proposed patch: synchronized_scanningGUCvariable
От
Stephen Denne
Тема
Re: [PATCHES] Proposed patch: synchronized_scanningGUCvariable
Дата
Msg-id
F0238EBA67824444BC1CB4700960CB48048E0F48@dmpeints002.isotach.com
Ответ на
Список
Дерево обсуждения
Re: [PATCHES] Proposed patch: synchronized_scanning GUC
variable Simon Riggs <simon@2ndquadrant.com>
Re: [PATCHES] Proposed patch: synchronized_scanning GUC variable Tom Lane <tgl@sss.pgh.pa.us>
Re: [PATCHES] Proposed patch: synchronized_scanning GUC
variable Simon Riggs <simon@2ndquadrant.com>
Re: [PATCHES] Proposed patch: synchronized_scanning GUCvariable "Heikki Linnakangas" <heikki@enterprisedb.com>
Re: [PATCHES] Proposed patch: synchronized_scanning
GUCvariable Jeff Davis <pgsql@j-davis.com>
Re: [PATCHES] Proposed patch: synchronized_scanning GUCvariable Ron Mayer <rm_pg@cheapcomplexdevices.com>
Re: [PATCHES] Proposed patch: synchronized_scanningGUCvariable "Heikki Linnakangas" <heikki@enterprisedb.com>
Re: [PATCHES] Proposed patch: synchronized_scanning
GUCvariable Simon Riggs <simon@2ndquadrant.com>
Re: [PATCHES] Proposed patch: synchronized_scanning GUCvariable Euler Taveira de Oliveira <euler@timbira.com>
Re: [PATCHES] Proposed patch: synchronized_scanning GUCvariable Tom Lane <tgl@sss.pgh.pa.us>
Re: [PATCHES] Proposed patch: synchronized_scanning GUCvariable "Zeugswetter Andreas ADI SD" <Andreas.Zeugswetter@s-itsolutions.at>
Re: [PATCHES] Proposed patch: synchronized_scanning GUCvariable Tom Lane <tgl@sss.pgh.pa.us>
Re: [PATCHES] Proposed patch: synchronized_scanning GUCvariable "Guillaume Smet" <guillaume.smet@gmail.com>
Re: [PATCHES] Proposed patch: synchronized_scanning GUCvariable "Zeugswetter Andreas ADI SD" <Andreas.Zeugswetter@s-itsolutions.at>
Re: [PATCHES] Proposed patch: synchronized_scanning GUCvariable Tom Lane <tgl@sss.pgh.pa.us>
Re: [PATCHES] Proposed patch: synchronized_scanning
GUCvariable Simon Riggs <simon@2ndquadrant.com>
Re: [PATCHES] Proposed patch: synchronized_scanning
GUCvariable Kenneth Marshall <ktm@rice.edu>
Re: [PATCHES] Proposed patch: synchronized_scanning
GUCvariable Alvaro Herrera <alvherre@commandprompt.com>
Re: [PATCHES] Proposed patch: synchronized_scanning GUCvariable Tom Lane <tgl@sss.pgh.pa.us>
Re: [PATCHES] Proposed patch: synchronized_scanning
GUCvariable "Kevin Grittner" <Kevin.Grittner@wicourts.gov>
Re: [PATCHES] Proposed patch: synchronized_scanning GUCvariable Tom Lane <tgl@sss.pgh.pa.us>
Re: [PATCHES] Proposed patch: synchronized_scanning GUCvariable Ron Mayer <rm_pg@cheapcomplexdevices.com>
Re: [PATCHES] Proposed patch: synchronized_scanning GUCvariable Tom Lane <tgl@sss.pgh.pa.us>
Re: [PATCHES] Proposed patch: synchronized_scanning GUCvariable "Zeugswetter Andreas ADI SD" <Andreas.Zeugswetter@s-itsolutions.at>
Re: [PATCHES] Proposed patch: synchronized_scanning
GUCvariable Kenneth Marshall <ktm@rice.edu>
Re: [PATCHES] Proposed patch: synchronized_scanning GUCvariable Gregory Stark <stark@enterprisedb.com>
Re: [PATCHES] Proposed patch: synchronized_scanning
GUCvariable Jeff Davis <pgsql@j-davis.com>
Re: [PATCHES] Proposed patch: synchronized_scanningGUCvariable "Stephen Denne" <Stephen.Denne@datamail.co.nz>
Re: [PATCHES] Proposed patch: synchronized_scanning GUC
variable Simon Riggs <simon@2ndquadrant.com>
Re: [PATCHES] Proposed patch: synchronized_scanning GUC variable Tom Lane <tgl@sss.pgh.pa.us>
Re: [PATCHES] Proposed patch: synchronized_scanning
GUC variable Bruce Momjian <bruce@momjian.us>
Re: [PATCHES] Proposed patch: synchronized_scanning
GUC variable Bruce Momjian <bruce@momjian.us>
Re: [PATCHES] Proposed patch: synchronized_scanning GUC variable Tom Lane <tgl@sss.pgh.pa.us>
Re: [PATCHES] Proposed patch: synchronized_scanning
GUC variable Bruce Momjian <bruce@momjian.us>
Re: [PATCHES] Proposed patch: synchronized_scanning GUC variable Tom Lane <tgl@sss.pgh.pa.us>
Re: [PATCHES] Proposed patch: synchronized_scanning
GUC variable Bruce Momjian <bruce@momjian.us>
Re: [PATCHES] Proposed patch: synchronized_scanning GUC
variable Alvaro Herrera <alvherre@commandprompt.com>
Re: [PATCHES] Proposed patch: synchronized_scanning GUC
variable Simon Riggs <simon@2ndquadrant.com>
Remove pg_dump -i option (was Re: Proposed patch:
synchronized_scanning GUC variable) Alvaro Herrera <alvherre@commandprompt.com>
Re: Remove pg_dump -i option (was Re: Proposed patch: synchronized_scanning GUC variable) Peter Eisentraut <peter_e@gmx.net>
Re: Remove pg_dump -i option (was Re: Proposed
patch: synchronized_scanning GUC variable) Bruce Momjian <bruce@momjian.us>
Re: Remove pg_dump -i option (was Re: Proposed patch: synchronized_scanning GUC variable) Tom Lane <tgl@sss.pgh.pa.us>
Re: Remove pg_dump -i option (was Re: Proposed
patch: synchronized_scanning GUC variable) Bruce Momjian <bruce@momjian.us>
Re: Remove pg_dump -i option (was Re: Proposed patch: synchronized_scanning GUC variable) Magnus Hagander <magnus@hagander.net>
Re: Remove pg_dump -i option (was Re: Proposed patch: synchronized_scanning GUC variable) "Dave Page" <dpage@postgresql.org>
Re: Remove pg_dump -i option (was Re: Proposed patch: synchronized_scanning
GUC variable) Magnus Hagander <magnus@hagander.net>
Re: Remove pg_dump -i option (was Re: Proposed patch: synchronized_scanning GUC variable) "Dave Page" <dpage@postgresql.org>
Re: {**Spam**} Re: [PATCHES] Proposed patch: synchronized_scanning GUC variable Dimitri Fontaine <dfontaine@hi-media.com>
Re: {**Spam**} Re: [PATCHES] Proposed patch:
synchronized_scanning GUC variable Bruce Momjian <bruce@momjian.us>
Re: {**Spam**} Re: [PATCHES] Proposed patch: synchronized_scanning GUC variable Gregory Stark <stark@enterprisedb.com>
Re: {**Spam**} Re: [PATCHES] Proposed patch: synchronized_scanning GUC variable Tom Lane <tgl@sss.pgh.pa.us>
Re: {**Spam**} Re: [PATCHES] Proposed patch: synchronized_scanning GUC variable Dimitri Fontaine <dfontaine@hi-media.com>
Re: [PATCHES] Proposed patch: synchronized_scanning GUC variable "Heikki Linnakangas" <heikki@enterprisedb.com>
Re: [PATCHES] Proposed patch: synchronized_scanning GUC
variable Simon Riggs <simon@2ndquadrant.com>
Re: [PATCHES] Proposed patch: synchronized_scanning GUCvariable "Heikki Linnakangas" <heikki@enterprisedb.com>
Re: [PATCHES] Proposed patch: synchronized_scanning GUC variable Hans-Juergen Schoenig <postgres@cybertec.at>
Jeff Davis wrote > > Well clusteredness is used or could be used for a few > different heuristics, > > not all of which this would be quite as well satisfied as > readahead. But for > > Can you give an example? Treating a file as a circular structure does > not impose any significant cost that I can see. (Pure speculation follows... if you prefer facts, skip this noise) The data used to create pg_stats.correlation is involved in estimating the cost of an index scan. It could also be used in estimating the cost of a sequential scan, if the query includes a limit. Consider: select * from huge_table_clustered_by_A where A
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