Re: [PATCHES] Better default_statistics_target
От | Robert Treat |
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Тема | Re: [PATCHES] Better default_statistics_target |
Дата | |
Msg-id | 200801312319.59723.xzilla@users.sourceforge.net обсуждение исходный текст |
Ответ на | Re: [PATCHES] Better default_statistics_target ("Kevin Grittner" <Kevin.Grittner@wicourts.gov>) |
Ответы |
Re: [PATCHES] Better default_statistics_target
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Список | pgsql-hackers |
On Thursday 31 January 2008 09:55, Kevin Grittner wrote: > >>> On Wed, Jan 30, 2008 at 8:13 PM, in message > > <d6d6637f0801301813n64fa58eu76385cf8a621907@mail.gmail.com>, "Christopher > > Browne" <cbbrowne@gmail.com> wrote: > > There seems to be *plenty* of evidence out there that the performance > > penalty would NOT be "essentially zero." > > I can confirm that I have had performance tank because of boosting > the statistics target for selected columns. It appeared to be time > spent in the planning phase, not a bad plan choice. Reducing the > numbers restored decent performance. > Bad plans from boosting to 100 or less? Or something much higher? -- Robert Treat Build A Brighter LAMP :: Linux Apache {middleware} PostgreSQL
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