Comment 3 for bug 478691

It might feel like chromium and mozilla are the ones to blame ... however, note that if there are only 3 builders available, there will be a backlog even without our dailies.

also i dont buy the "empty builders should be left unused" from above. maybe you could say "if only one buildd is empty it should be left unused" ... but as long as there is still one builder slot free all should be fine.

Maybe you could say if > 20% of builders are idle, just go ahead and schedule.