1. A method comprising: receiving runtime information about a set of application(s) that use a thin provision data storage device for data storage; determining a set of runtime behavior(s) of the set of applications(s) with respect to use of the thin provisioning data storage device for data storage based on the runtime information; calculating a runtime representation capacity based on a predetermined over-provisioning ratio and the set of runtime behavior(s); wherein the runtime representation capacity is calculated to be a single value based on an amount of data storage used by the set of application(s) in aggregate.