24. The computer-readable non-transitory storage medium of claim 16 , wherein the testing further comprises measuring benefits based on performance improvement of said executing the particular database query language statement with said one or more tuning recommendations enabled.
24. The computer-readable non-transitory storage medium of claim 16 , wherein the testing further comprises measuring benefits based on performance improvement of said executing the particular database query language statement with said one or more tuning recommendations enabled. 25. The computer-readable non-transitory storage medium of claim 24 , the instructions further comprising instructions for, based on the testing, determining a subset of said plurality of tuning recommendations resulted in performance improvement that meets a criterion.