d so on, up to a
            maximum threshold of <span class="parameter">max</span> microseconds.
            </p>
        <p>
            These values are thresholds only. Since Berkeley DB has no thread
            available in the library as a timer, the threshold is only checked
            when a thread enters the Berkeley DB library to process an incoming
            replication message. Any amount of time may have passed since the
            last message arrived and Berkeley DB only checks whether 