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

    GROWLIM sets the number of pages that the system must have on the
    free-page list so that a process can add a page to its working
    set when it is above quota. GROWLIM has no effect if the process
    is below its working set quota. GROWLIM acts as a fast shutoff
    to the working set extent mechanism based on the system's free
    memory.

    GROWLIM has AUTOGEN, DYNAMIC, and MAJOR attributes.