.df
The .df command displays a list of the free global memory objects in the global heap. The list has the following form:
address: size owner [chain]
address
Specifies physical and heap addresses.
size
Specifies the size of the object, in bytes.
owner
Always specifies that the module is free.
chain
Specifies the previous and next addresses in the list of least recently used (LRU) objects. The debugger displays the addresses only if the segment is movable and discardable.