This isn't so much another aproach, as it it some tweaks on top of what's there. Right? This set seems to present a bunch of ideas, like "promote if accessed twice". Seems like a good idea, but I'm a lot more interested in seeing data about it being a good idea. What workloads is it good for? Bad for? These look like fun to play with, but I'd be really curious what you think needs to be done before we start merging these ideas.
