              structure.  Note that since a thread does not signal the
                        BDB library that it will no longer be making calls, unused
                        structures may accumulate until a cleanup is triggered either
                        using a high water mark or by running 
                        <a class="xref" href="envfailchk.html" title="DbEnv::failchk()">DbEnv::failchk()</a>.
                    </p>
              </li>
            </ul>
          </div>
        </div>
    