Re: Large tables (was: RAID 0 not as fast as expected) - Mailing list pgsql-performance

From mark@mark.mielke.cc
Subject Re: Large tables (was: RAID 0 not as fast as expected)
Date
Msg-id 20060919034547.GA24692@mark.mielke.cc
Whole thread Raw
In response to Re: Large tables (was: RAID 0 not as fast as expected)  ("Luke Lonergan" <llonergan@greenplum.com>)
Responses Re: Large tables (was: RAID 0 not as fast as
List 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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