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

       /HOLD
       /NOHOLD (default)

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

    Selects either tasks that are on hold, or tasks that are not on
    hold for display.

    If you do not specify a task, /HOLD selects all tasks that are on
    hold. If you specify a task list, /HOLD selects the tasks in the
    task list that are on hold.

    If you do not specify a task, /NOHOLD selects all tasks that
    are not on hold. If you specify a task list, /NOHOLD selects the
    tasks in the task list that are not on hold.

    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.