modules/core/conf/metrics_module.xml

<module name="MetricsAggregatorModule" class="org.apache.synapse.metrics.MetricsAggregatorModule">
    <inflow>
        <handler name="GlobalRequestCounter"
                 class="org.apache.synapse.metrics.GlobalRequestCountHandler">
            <order phase="Transport"/>
        </handler>
        <!--<handler name="ServiceRequestCounter"
                 class="">
            <order phaseLast="true" phase="Dispatch"/>
        </handler>
        <handler name="OperationInCounter"
                 class="">
            <order phase="OpPhase"/>
        </handler>-->
    </inflow>
    <!--<outflow>
        <handler name="GlobalResponseCounter"
                 class="">
            <order phase="OpPhase"/>
        </handler>
        <handler name="OperationOutCounter"
                 class="">
            <order phase="OpPhase"/>
        </handler>
        <handler name="ResponseTimeHandler"
                 class="">
            <order phase="MessageOut" phaseLast="true"/>
        </handler>
    </outflow>-->
    <!--<Outfaultflow>
        <handler name="FaultCounter"
                 class="">
            <order phase="MessageOut"/>
        </handler>
    </Outfaultflow>-->
</module>