This object's description in the source MIB states it reports bytes of available (free) memory in the Meterworks agent's heap, despite the object being named 'Used,' an inconsistency in the vendor's original documentation. Taken at face value, administrators would read this figure as how much heap capacity remains open for further allocation, not how much has already been consumed. For example, a low mwHeapUsed value close to zero, read per its literal description, would signal the heap pool is nearly exhausted and additional allocations could start failing.