The monitor debugger is a tool used for recovery in the case a system failure or access to system resources are unavailable by the virtual debugger.
The monitor debugger allows:
displaying and changing D3 virtual memory.
displaying and changing real memory (UNIX virtual memory).
forcing a flush of the D3 memory space back to disk.
displaying and changing the status of the system semaphores to remove a dead lock situation.
accessing a locked system.
terminating processes and shut down.
tracing modifications to a memory area.
putting low level breakpoints in the virtual code.