This
            means that the environment cannot be accessed by multiple
            processes.  In this case, the regions are managed only in
            memory, and they are not written to the filesystem. You
            indicate that heap memory is to be used for the region files by
            specifying
                <span>
                    <code class="literal">DB_PRIVATE</code> to the
                    
                    <code class="methodname">DbEnv::open()</code>
                    met