Library /sys$common/syshlp/dbg$help.hlb DEBUG, SHOW, TASK, Qualifiers, /PRIORITY  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /PRIORITY=(n[, . . . ])

    When the event facility is THREADS, use the PTHREAD tset -s
    thread-number command.

    If you do not specify a task, selects all tasks having any of
    the specified priorities, n, where n is a decimal integer from 0
    to 15. If you specify a task list, selects the tasks in the task
    list that have any of the priorities specified.

    You can get help on POSIX Threads debugger commands by typing
    PTHREAD HELP.

    See the Guide to POSIX Threads Library for more information about
    using the POSIX Threads debugger.