So it takes 10 min until you've gone to the drastic solution? With this time-frame it would be risky to go the bathroom, not go to a movie. Also even the backup sounds like a primary in this scenario.
Sure, but the assumption here is that primary and backup (edit: probably, ie. they're not coordinating this) aren't going to the bathroom at the same time. It's also based on the idea that alerts are extremely rare to begin with. If you're expecting at least one page every rotation, that's way, way too often. Step one is to get alerts under control, step two is a sane on-call rotation.
