iple mpool regions are used and there is a periodic gathering and clearing of statistics. This also fixes a second bug where if you compile without statistics and explicitly set the mpool default pagesize, other environment handles to that environment would not see the correct mpool default pagesize.  [#18386]
            </p>
            </li>
            <li>
              <p>
 Fix failure to flush pages to disk. [#18760]
            </p>
            </li>
            <li>
              <p>
 Fix a general