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

       /WSEXTENT=n

    Defines a working set extent for the batch job; the /WSEXTENT
    qualifier overrides the working set extent in the UAF.

    Specify the value of n as a number of 512-byte pagelets on Alpha
    or 512-byte pages on VAX. Note that OpenVMS rounds this value
    up to the nearest CPU-specific page so that the actual amount of
    physical memory allowed may be larger than the specified amount
    on Alpha. The value n can be any integer from 1 to 65,535, 0, or
    the keyword NONE. For further information, refer to the OpenVMS
    System Manager's Manual.

    To impose a lower value, use this qualifier to override the
    base queue value established by the system manager rather than
    the value authorized in your UAF. A value of 0 or the keyword
    NONE sets the default value either to the value specified in the
    UAF or working set extent established for the queue. You cannot
    request a value higher than your default.