Benchmarking ATS

[Mike Partridge]

Is there an easy method to artificially vary the cache hit/miss ratio 
that people would recommend.  I am currently just generating more random 
content then can be cached by ATS?
This is what I was in process of doing, but was curious if there was a 
better method others may have used.  I am trying to do this to benchmark 
ATS at different cache hit/miss ratios.

Thanks
-Mike