Description
Site: http://docs.mongodb.org/manual/reference/command/collMod/
Section: Flags -> Powers of Two Record Allocation
First paragraph says "Use newCollectionsUsePowerOf2Sizes to use the exact fit allocation strategy."
Technically, as we can see by following the link, we set newCollectionsUsePowerOf2Sizes: false in order to use the exact fit allocation strategy.
Recommended text: "Set newCollectionsUsePowerOf2Sizes : false in order to use the exact fit allocation strategy."