The Five-Minute Rule Ten Years Later, and Other Computer Storage Rules of Thumb.

http://doi.acm.org/10.1145/271074.271094 db/journals/sigmod/GrayG97.html Jim Gray Goetz Graefe The Five-Minute Rule Ten Years Later, and Other Computer Storage Rules of Thumb. 63-68 sigmodR/26-4/P063.pdf 1997 26 SIGMOD Record 4 db/journals/sigmod/sigmod26.html#GrayG97 http://www.acm.org/sigmod/record/issues/9712/gray.ps