1. A computer readable medium having a virtual machine object memory structure with a new generation space and an old generation space within which are stored or referenced objects that are copies of persistent objects in a persistent object memory, the new generation space and the old generation space supporting generational garbage collection of the stored or referenced objects, the improvement comprising: a permanent object memory space within which is stored or referenced objects that are copies of persistent objects in the persistent object memory, the permanent object memory space receiving copies of persistent objects directly from the persistent object memory and being subject to garbage collection other than the generational garbage collection applied to the new generation space and the old generation space.