07 ace oracle 2 tier

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1、Lab7:TroubleshootingandPredictingthePerformanceofanOracleApplicationObjectiveEarlierlabsfocusedonnetworksandinternet(thephysicallayerthroughthetransportlayer).However,applicationlayerperformanceiswhatusersreallycareabout.ThislabusesOPNET’sApplicationCharacterizationEnvironmen

2、t(ACE)moduletovisualize,troubleshoot,andpredictapplicationresponsetimesforaspecificOracleapplication.OverviewOPNET’sApplicationCharacterizationEnvironment(ACE)providespowerfulvisualizationanddiagnosiscapabilitiesthataidinapplicationanalysis.Networkmanagersandapplicationdevelo

3、perscanuseACEto·Pinpointnetworkandapplicationbottlenecks.·Diagnoseapplicationproblems.·Exploreproposedfixestoexistingapplications.·Predictapplicationperformanceundervaryingconfigurationsandnetworkconditions.Inthislab,we’llanalyzetheperformanceofa2-Tier(client/server)OracleApp

4、lication.We’llinvestigatetheprobablebottlenecks,whichleadtounacceptableresponsetimes.Thesubjectapplicationrunsonthefollowingtopology.ClientsaccesstheOracleServerinthedatacenterthroughahigh-bandwidth,low-latencyMetropolitanAreaNetwork(MAN).Theclientapplicationresponsetimeismea

5、suredtobe12seconds.CaptureTrafficWhensolvingapplicationperformanceproblemswithACE,itisimportanttofollowthecorrectcapturemethod.ACEisdesignedtodiagnoseasingleapplicationtransaction.Youmustprovidevaliddata:atracefilethatOPNETITGuruLab7,Page1includesonlytheapplicationtraffic.You

6、mustfilteroutextraneouspacketsbecauseACEconsidersthemtobepartofthesubjectapplication.Ideally,youwouldcaptureatracethatrepresentsonlyonetransaction.Inreality,youwillprobablyneedtofilteroutextraneousmessages.Youcanfiltermessagesatthreedifferenttimes:·Whenyoucapturethetracefilef

7、romthenetwork.Filteringbyaddressorbyportcreatessmallercapturefilesthatrequirelesspost-processing.Thisistherecommendedtimetofilter.·Duringimport.·WithintheACEeditors,asshowninthislab.Forthislab’scapturefile,tracecaptureshavebeentakensimultaneouslyatboththeclientandtheserver.Th

8、esecapturesarethenmergedtoobtainthebestanalysisofdelaysateachcompute