he 

                    
                    <code class="methodname">DbEnv::set_shm_key()</code>
                    
                method for more information.
            </span>
        </p>
            <p>
            On Windows platforms, the use of system memory for the region files
            is problematic because the operating system uses reference counting
            to clean up shared objects in the paging file automatically. In
            addition, the default access permissions for share