On 04/13/2011 05:03 PM, Tom Lane wrote:
That 4:1 ratio is based on some rather extensive experimentation that
I did back in 2000.  In the interim, disk transfer rates have improved
quite a lot more than disk seek times have, and the CPU cost to process
a page's worth of data has also improved compared to the seek time.
My experience is that at least a 1/1 is more appropriate.

JD

--
Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance

Reply via email to