the record counts are
                 stored. In addition, the entire tree must be locked during both
                 insertions and deletions, effectively single-threading the tree for
                 those operations. Specifying <span class="bold"><strong>-recnum</strong></span>
                 can result in serious performance degradation for some applications
                 and data sets.
            </p>
            <p>
                 It is an error to specify both <span class="bold"><strong>-d