<p>
                 Set the size of the extents of the Queue database; the size is
                 specified as the number of pages in an extent.  Each extent is created
                 as a separate physical file. If no extent size is set, the default
                 behavior is to create only a single underlying database file.
             </p>
            <p>
                  For information on tuning the extent size, see 
                 <a href="../../programmer_reference/rq_conf.html#am_conf_ext