sing the
         <a class="xref" href="dbset_heapsize.html" title="Db::set_heapsize()">Db::set_heapsize()</a>
         method.
    </p>
      <p>
         The <code class="methodname">Db::get_heapsize()</code> method may be called at any time during the
         life of the application.
    </p>
      <p>
         The <code class="methodname">Db::get_heapsize()</code> <span>
            
            <span>
                method either returns a non-zero error value or throws an
                exception t