             </div>
            </div>
            <p>
            Finally, you can cause system memory to be used for your
            regions instead of memory-mapped files. You do this by providing
                <span>
                    <code class="literal">DB_SYSTEM_MEM</code> to the
                    
                    <code class="methodname">DbEnv::open()</code>
                    method.
                </span>

                
        </p>
            <p>
            When region files ar