Re: Large tables (was: RAID 0 not as fast as expected)
| От | mark@mark.mielke.cc |
|---|---|
| Тема | Re: Large tables (was: RAID 0 not as fast as expected) |
| Дата | |
| Msg-id | 20060919034547.GA24692@mark.mielke.cc обсуждение |
| 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
|
| 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
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