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

    EXTRACPU sets the time, in units of 10 milliseconds, allotted to
    each of a process's exit handlers (for each access mode) after
    the process times out (that is, reaches its CPU time limit).

    EXTRACPU is a DYNAMIC attribute parameter.