See bug 739556 for the context; we started building up pending builds on the ios-device, ios-device-xcode-clang, and ios-simulator-xcode-clang bots at around 08:00 in the morning on 7/5, but the alert didn't fire until 17:00, at which point we had ~500 pending jobs across the three builders (each of which had only 10 bots in a pool).

A useful alert should've fired much much earlier; we probably need to figure out how to change the alerts to be sensitive to the # of jobs we'd expect to have and/or the number of bots that are available in a given pool.

shortn/_Sa2yb9s13N for the link to the pending queues in Viceroy, and o/e/m2546809710000039 for the alert that fired way too late :).