jetty-server/src/main/config/etc/jetty-stats.xml

<?xml version="1.0"?>
<!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN" "http://www.eclipse.org/jetty/configure_9_3.dtd">

<!-- =============================================================== -->
<!-- Mixin the Statistics Handler                                    -->
<!-- =============================================================== -->

<Configure id="Server" class="org.eclipse.jetty.server.Server">
  <Call name="insertHandler">
    <Arg>
      <New id="StatsHandler" class="org.eclipse.jetty.server.handler.StatisticsHandler">
      </New>
    </Arg>
  </Call>
  <Call class="org.eclipse.jetty.server.ConnectorStatistics" name="addToAllConnectors">
    <Arg><Ref refid="Server"/></Arg>
  </Call>
</Configure>