VMS Help Sys Parameters, NPAGECALC  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    NPAGECALC controls whether the system automatically calculates
    the initial size for nonpaged dynamic memory.

    Compaq sets the default value of NPAGECALC to 1 only during the
    initial boot after an installation or upgrade. When the value of
    NPAGECALC is 1, the system calculates an initial value for the
    NPAGEVIR and NPAGEDYN system parameters. This calculated value is
    based on the amount of physical memory in the system.

    NPAGECALC's calculations do not reduce the values of NPAGEVIR and
    NPAGEDYN from the values you see or set at the SYSBOOT prompt.
    However, NPAGECALC's calculation might increase these values.

    AUTOGEN sets NPAGECALC to 0. NPAGECALC should always remain 0
    after AUTOGEN has determined more refined values for the NPAGEDYN
    and NPAGEVIR system parameters.