/sys$common/syshlp/helplib.hlb Sys Parameters, NPAG_AGGRESSIVE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    (Alpha only) NPAG_AGGRESSIVE is the percentage of packets on
    a nonpaged pool lookaside list that remain after the list is
    trimmed during aggressive reclamation.

    NPAG_AGGRESSIVE is a DYNAMIC parameter.