The system attributes used to record virtual memory usage and assign limits to it are:
The memory.myusage attribute of an lnode is equal to the sum of the virtual memory usage of all processes currently attached to the lnode.
The memory.usage attribute of an lnode is equal to the sum of its memory.myusage attribute and the memory.usage attributes of its child lnodes.
The memory.limit attribute is applied to the memory.usage attribute; it limits the combined memory usage of all processes attached to the lnode and all member lnodes.