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

       /WSEXTENT=n

    Defines for the batch job a working set extent, the maximum
    amount of physical memory that the job can use. The job only
    uses the maximum amount of physical memory when the system has
    excess free pages. The value set by this qualifier overrides the
    value defined in the user authorization file (UAF) of any user
    submitting a job to the queue.

    Specify the value of n as a number of 512-byte pagelets on Alpha
    or and 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.

    If you specify 0 or NONE, the working set extent value defaults
    to the value specified in the UAF or by the SUBMIT command (if it
    includes a WSEXTENT value).

    You also can specify this qualifier for an output execution
    queue. Used in this context, the /WSEXTENT qualifier establishes
    the working set extent of the symbiont process for an output
    execution queue when the symbiont process is created.