Quite correct, we tend to “pluck the pond from under the duck”:-P or better “go on a wild goose chase” when confronted with DB performance problems, instead of pondering the root cause. It is well worth it to consider the “other” factors, e.g. time changes as well as environmental adjustments, as potential causes before we fiddle the code. Uhm, theoretical prognosis, the prognosis theoretically:hehe:.