http://www.pathsearch.com/histonet.html

Mickie,
There has been a previous discussion on Histonet on workload and if you go to 
the above web site you can search for those messages and see what was said 
before on the subject. Enter the words "workload" or something like "blocks 
per hour" and click on search and you will find all the posts on this subject.
Andi Grantham