Right now we setup the alert to be triggered if in the past hour Findit has triggered more swarming tasks over threshold.

But it's a valid case for Findit to trigger many analyses at the same time for one single build(waterfall or CQ). And when that happens, even though Findit behaves normally, the alert could still be fired.

Suggestions:
1. Metrics wise, we may want to check number of tasks per analysis
2. Analysis wise, we may want to control the number of analyses we can run at the same time for each build; or do something as suggested in https://bugs.chromium.org/p/chromium/issues/detail?id=850319#c2