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

    FREEGOAL establishes the number of pages that you want to
    reestablish on the free-page list following a system memory
    shortage. Memory shortages occur when the system drops below the
    minimum number of pages required on the free-page list (FREELIM).
    The value of FREEGOAL must always be greater than or equal to the
    value of FREELIM.

    FREEGOAL has the AUTOGEN, DYNAMIC, and MAJOR attributes.