Re: Large tables (was: RAID 0 not as fast as expected)
От | mark@mark.mielke.cc |
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Тема | Re: Large tables (was: RAID 0 not as fast as expected) |
Дата | |
Msg-id | 20060919034547.GA24692@mark.mielke.cc обсуждение исходный текст |
Ответ на | Re: Large tables (was: RAID 0 not as fast as expected) ("Luke Lonergan" <llonergan@greenplum.com>) |
Ответы |
Re: Large tables (was: RAID 0 not as fast as
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Список | pgsql-performance |
On Mon, Sep 18, 2006 at 06:10:13PM -0700, Luke Lonergan wrote: > Also be sure to set the random_page_cost parameter in > postgresql.conf to 100 or even higher when you use indexes, as the actual > seek rate for random access ranges between 50 and 300 for modern disk > hardware. If this parameter is left at the default of 4, indexes will often > be used inappropriately. Does a tool exist yet to time this for a particular configuration? Cheers, mark -- mark@mielke.cc / markm@ncf.ca / markm@nortel.com __________________________ . . _ ._ . . .__ . . ._. .__ . . . .__ | Neighbourhood Coder |\/| |_| |_| |/ |_ |\/| | |_ | |/ |_ | | | | | | \ | \ |__ . | | .|. |__ |__ | \ |__ | Ottawa, Ontario, Canada One ring to rule them all, one ring to find them, one ring to bring them all and in the darkness bind them... http://mark.mielke.cc/
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