Logging problem!!

Hello, I have problems logging input & output of a proxy. Here are basic question about ESB logging 1) I am looking into wso2esb-3.0.0\repository\logs, is this is the right Location ? 2) There are wso2-esb-service.log and wso2-esb-trace.log files which file should log my message 3) Am I have to change the Log Level (from default...) 4) What is the best way to catch the response time and if this is more than n seconds then log it or alert the user (may be email) Here is my proxy definition. (I will appreciate your response ) <?xml version="1.0" encoding="UTF-8"?> <definitions xmlns="http://ws.apache.org/ns/synapse">     <registry provider="org.wso2.carbon.mediation.registry.WSO2Registry">         <parameter name="cachableDuration">0</parameter>     </registry>     <proxy name="EmployeeProxyRest" transports="https http" startOnLoad="true" trace="enable" statistics="enable">         <target >             <inSequence>                 <log level="full"/>                 <send>                     <endpoint name="devCalendarFailoverProxy">                         <failover>                             <endpoint name="endpoint_urn_uuid_82B148B4842E9B83CE515715571872844422078598">                                 <address uri="http://devwarch1/commons/services/rest/calendar/HolidayCalendar" format="get"/>                             </endpoint>                             <endpoint name="endpoint_22">                                 <address uri="http://devserver2/app/services/rest/method1" format="get"/>                             </endpoint>                         </failover>                     </endpoint>                 </send>                 <drop/>             </inSequence>             <outSequence>                 <log level="full"/>                 <send/>             </outSequence>         </target>     </proxy>          <sequence name="fault">         <log level="full">             <property name="MESSAGE" value="Executing default 'fault' sequence"/>             <property name="ERROR_CODE" expression="get-property('ERROR_CODE')"/>             <property name="ERROR_MESSAGE" expression="get-property('ERROR_MESSAGE')"/>         </log>         <drop/>     </sequence>     <sequence name="main">         <in>             <log level="full"/>             <filter source="get-property('To')" regex="http://localhost:9000.*">                 <send/>             </filter>         </in>         <out>             <log level="full"/>             <send/>         </out>     </sequence>