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

 expanding debugger memory pool

    Facility: DEBUG, VMS Debugger

    Explanation: The debugger kernel maintains a memory pool from
    which it allocates data structures to keep track of breakpoints,
    tracepoints, watchpoints, and so on. The initial size of
    the memory pool is 256 pages. The memory pool is expanded
    automatically when needed, and this informational is signaled
    when memory pool expansion occurs. If you have set a large number
    of breakpoints, tracepoints, or watchpoints, this message is to
    be expected.

    User Action: If this message appears for no evident reason (i.e.
    you have not set a large number of breakpoints, tracepoints, or
    watchpoints), there may be something wrong with the debugger. In
    this case, submit a Software Performance Report (SPR).