I'm curious what you're getting at IRT memory mapped I/O. To me, one of Mongo's selling points is the way it lets the OS manage caching for you instead of both

I'm curious what you're getting at IRT memory mapped I/O. To me, one of Mongo's selling points is the way it lets the OS manage caching for you instead of bothering you with tuning a bunch of buffers and things along those lines. For the sake of disclosure, I'm running 6 servers in a pretty high volume cluster, and while I've had to address some issues here and there, memory management hasn't been one of them.