Dale, Histogram is good though takes more work to get in SQL plus it is harder to define the goals. It is much easier to say 95 percentile should be within a second and 99 percentile within 3 seconds than define goals in terms of histogram.

… more meaningful. I am not sure what a 99 or 95 percentile ranking would mean to me. If anything it would lead… get a lot of noise. To generate a histogram with SQL I usually just use the group by of a count…