VMS Help MONITOR, MONITOR, PROCESSES, Classname Qualifiers, /TOPRBS  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /TOPRBS (VAX Only)

    On OpenVMS VAX systems, specifies that a bar graph listing the
    top balance slot faulting processes be produced instead of the
    standard display and summary output. Values are expressed in
    units of balance slot faults per second.