[Swizec]

Alert emails can do a lot, but not everything.

Sometimes you need a way to look at the system and say "Hmm, everything works, but those two queues shouldn't have 20k items waiting in them ..."

[fennecfoxen]

Or, even better, "Things aren't working. Why not? Oh, snap, these queues have like 20k items in them. Maybe something's wrong with their consumer."

handy, that one.