1. A method, in a data processing system, for paging out data from a memory of the data processing system to a storage device of the data processing system, comprising: identifying a set of data to transfer to a storage space of a virtual memory management system as part of the paging out operation; transferring at least a portion of a first subset of the set to the storage space; and selecting a second subset of the set to transfer to the storage space, wherein data of the second subset is accessible by one or more applications running on the data processing system while the second subset is part of the set of data to transfer and during the time required to complete the transference of the at least a portion of the first subset of the set to the storage space.