(x86 systems only) NPAGEDYN_S2 sets the size of the S2 nonpaged dynamic
    pool in megabytes.  This figure is rounded up to an integral number of
    pages. NPAGEDYN_S2 establishes the initial setting of the S2 nonpaged
    pool size, but the pool size can be increased dynamically.

    To set a value for this parameter, use AUTOGEN initially, and
    then monitor the amount of space actually used with the DCL
    command SHOW MEMORY/POOL/FULL.

    For the benefit of OpenVMS systems with limited physical memory,
    AUTOGEN logs a warning message in its report if NPAGEDYN_S2 or
    NPAGEXPVIR_S2 exceed certain percentages of physical memory.

    AUTOGEN limits its own calculated values for NPAGEDYN_S2 and
    NPAGEXPVIR_S2. These calculated values are adequate for most systems.
    If your system requires a larger value, you can override the
    AUTOGEN calculated values by setting higher values for
    MIN_NPAGEDYN_S2 and MIN_NPAGEXPVIR_S2 in MODPARAMS.DAT.

    NPAGEDYN_S2 has AUTOGEN, FEEDBACK, GEN, and MAJOR attributes.