<updateHandler class="solr.DirectUpdateHandler2">
    <autoSoftCommit>
        <maxTime>2000</maxTime>
    </autoSoftCommit>
    <autoCommit>
        <maxTime>20000</maxTime>
        <openSearcher>false</openSearcher>
    </autoCommit>
    <updateLog>
        <str name="dir">${solr.ulog.dir:}</str>
    </updateLog>
</updateHandler>