I'd make sure you use the new storage engine, wiredtiger too if you give them another shot. The standard one works well on read heavy use cases but saturates I

I'd make sure you use the new storage engine, wiredtiger too if you give them another shot. The standard one works well on read heavy use cases but saturates I/O pretty quickly if you're doing a lot of updates that make documents grow if you don't take some precautions. I also agree, having a setting of "fire and forget", although useful in some (limited!) use cases, is not a sane default.