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

    (Alpha only) MAXBOBMEM defines the maximum amount of physical
    memory, measured in pagelets, that can be associated with a
    single buffer object created by a process in user mode. The
    default value of 0 means there is no system-imposed limit on
    the size of a buffer object.

    MAXBOBMEM is a DYNAMIC parameter.

    Other MAXBOB* parameters are obsolete in OpenVMS Version 7.3.