solr_auto_commit_sample

    <!-- The default high-performance update handler -->
    <updateHandler class="solr.DirectUpdateHandler2">

        <updateLog>
            <str name="dir">${solr.ulog.dir:}</str>
        </updateLog>

        <autoSoftCommit>
            <maxDocs>250</maxDocs>
            <maxTime>10000</maxTime>
        </autoSoftCommit>

        <autoCommit>
            <maxTime>10000</maxTime>
            <maxDocs>500</maxDocs>
            <openSearcher>false</openSearcher>
        </autoCommit>
    </updateHandler>