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

    (Alpha only) FAST_PATH is a static system parameter that enables
    (1) or disables (0) the Fast Path performance features for all
    Fast Path-capable ports.

    Starting in OpenVMS Version 7.2, FAST_PATH is enabled by default.
    In Versions 7.0 and 7.1, FAST_PATH was disabled by default.

    For additional information, see FAST_PATH_PORTS and IO_PREFER_
    CPUS.