On 14 February 2012 21:55, Bruce Momjian <bruce@momjian.us> wrote:
> Document random page cost is only 4x seqeuntial, and not 40x.
>
> Branch
> ------
> master
>
> Details
> -------
> http://git.postgresql.org/pg/commitdiff/c1d9df4fa227781b31be44a5a3024865a7f48049
>
> Modified Files
> --------------
> doc/src/sgml/config.sgml | 20 ++++++++++++++++++++
> 1 files changed, 20 insertions(+), 0 deletions(-)
This change does say that it is 40 times slower:
"The default value can be thought of as modeling random access as 40
times slower than sequential..."
--
Thom
