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
