11. The method as recited in claim 10 wherein said determining feature vectors for a plurality of historical database queries from said group of historical database queries further comprises: extracting historical query features from an historical database query of said plurality of historical database queries; and utilizing a plurality of said historical query features to develop a query plan vector for said historical query.
13. The method as recited in claim 11 , further comprising: utilizing database load information regarding execution of said historical database query and a set of said historical query features to determine a system load vector for said historical query.