7. The method of claim 1 , further comprising stratifying the representative workload into at least two strata including a first stratum and a second stratum, and determining a minimum number of queries to achieve the probability of correct selection of the sample workload, and wherein updating the sample workload includes selecting the minimum number of queries from the first stratum.
8. The method of claim 7 , wherein updating the sample workload includes selecting the minimum number of queries from each of the at least two strata.