WebLogic系统管理培训(中级).ppt

WebLogic系统管理培训（中级）课程介绍,2008年7月,讲师简介,曹云SeniorTrainingConsultant高级顾问高级架构师专业技能：4年BEA中间件产品技术支持经验，包括：WebLogicServer,Tuxedo,Integration,Portal,SipServer等。4年企业级项目架构和技术咨询经验，超过2年的项目管理经验；3年以上分析和设计经验,非常了解SOA和EAI架构,熟悉面向对象的设计方法和工具。6年以上的软件开发经验。熟悉常见编程语言和工具。包括：3年以上的java（包括AWT,swing，熟悉eclipse,SunOneStudio,Eclipse等)项目经验;3年以上的UnixC项目经验；2年以上的Delphi项目经验;3年以上的VC项目经验;3年以上的VB项目经验;精通J2EE,非常了解EJB,JMS,XML(JAX,DOM,Xbean),JDBC,XA，hibernate,strut等技术。3年以上的J2EE项目经验，熟悉WebLogic和Websphere等J2EE应用服务器;熟悉IBM,HP-UX,SUN以及BEAJrockit等JVM；熟悉多种操作系统：WindowsNT/2000,IBMAIX,HP-UX以及Linux。4年以上的电信行业从业经验，熟悉电信业务和流程，熟悉NGOSS,BOSS等业务体系。,认证：BEACertificationforWebLogicSOA,2006BEACertificationforWebLogicIntegration、Portal,2006;BEACertificationforWebLogicWorkshop,2005;BEACertificationforWebLogicServerAdmin,2005;BEATuxedoCertification,2002;国家计算机专业认证工程师,2002;获奖：BEACountryTeamExcellenceAward,Q4,FY2008BEAAPACSpotAward,Q2,FY2008.BEAAPACSpotAward,Q2,FY2007.BEAAPACSpotAward,Q3,FY2006.BEA中国技术论文大赛特等奖,2004;学历：09/1997-07/2000，北京大学，硕士，规划与信息系统专业09/1992-07/1997，北京大学，本科，环境科学,课程目标,在课程结束后，您将能够描述WebLogicServer(WLS)的架构，包括domain、server和machine等概念。能构安装，配置和管理WLS能够配置一个集群，实现应用的loadbalance和failover实施WLS的中数据库，web站点，JMS，应用部署等模块的日常管理功能能够通过修改调优WLS性能了解常见并且严重故障的解决方法,课程对象,安装部署工程师系统管理工程师开发人员（配置、部署）,学员自我介绍,请简单自我介绍您在BEA产品、技术方面的经历你在使用WLS的工作中碰到的困难对课程的希望,课程安排第一天,课程安排第二天,课程安排第三天,为了使您更好地从这次培训中受益建议如下几点,反思并思考您所学的知识、技能空杯心态理解吸纳、而非批驳反对讨论时对事不对人通过提问来检验是否理解了积极自愿地与别人分享您的观点和经验请务必准时参加每堂课,课堂要求,遵守时间请务必准时参加每堂课有急事可以自由离开，尽量不影响别的同学手机请设置为静音，接听电话请在教室外。,网络资源,第一部分2008年7月,目录（详见电子版）,01-IWLS02-WLA03-CRTE04-JNDI05-CFGS06-JMS07-JAPL08-RCFG09-CLST10-PRFT11-MNTR,第二部分WebLogicservertroubleshootingPatterns,Topicsfortoday,WebLogicServersupportpatternsChecklistfortroubleshooingWebLogicserver,BEASupportPatternMethodology,BEAsSupportPatternsinvolve:DiagnosisDescribetheproblem,symptomsandbehaviourUnderstandWHYitoccurs.TroubleshootingApplyaprocessofeliminationGatherrelevantdatawithavailabletoolsLookforenvironment-specificdata.ResolutionNarrowinandidentifythecauseApplyaworkaroundorsolution.,WhyUseSupportPatterns?,SupportPatterns:AllowforcollaborationbetweenyourteamandBEASupporttoresolvecomplexsupportissues.Recognizethatyoubestunderstandyourapplication/systemarchitectureandBEASupportbestunderstandstheproductsAllowbestpracticestobeappliedtoyourinternalsupportprocessandteamMeanyouspendlesstimeonmaintenanceand/orsupportIdentifythecauseoftheproblem,allowingfasterfixesProvidespecificpatternsforanumberoffrequentlyoccurringproblems.,ClassicPatternsforWebLogicServer,ServercoreHighCPUusageServerhangOutofmemoryerrors.,MoreSupportPatternResources,TofindoutmoreaboutBEASupportPatterns,see:,Pattern1,Servercore,RoadMap,ServerCorePatternWhatisaServerCore?SymptomsofaServerCoreServerCoreInvestigationCausesofServerCore,WhatisaServerCore?,WhenaserversJavaVirtualMachine(JVM)processcrashes,itproducesaservercorefile.Aservercorefileisasnapshotdumpoftheprocessatthepointoffailure.,SymptomsofServerCore,JVMprocessdisappearsOnUnix,servercorefilesarecreatedinthedirectorywheretheserverwasstartedfrom.OnWindows,asimilarfileiscreatedin:c:DocumentsandSettingsAllUsersDocumentsDrWatsonInsomecases,NOcorefileisproduced!Processorfileresourcelimitsmaystopacorefilebeingproduced.Acorefileisnecessarytoinvestigatewhytheserverfails.,RoadMap,ServerCorePatternServerCoreInvestigationOverviewNoCoreFile?ToolsforInvestigationInvestigatingonDifferentPlatformsCausesofServerCore,OverviewofInvestigation,VerifyacorefileisproducedbytheserversJVM.Usethecorefiletoinvestigate:UsecorefilediagnostictoolstogetcrashdetailsDeterminewhattypeofnativecodecausedthefailure,egaJDBCdriverorJNIcallsfromapplicationcode.Investigatethespecificcauseoffailure:ThismayrequiredetailedknowledgeofthenativecodeAddeddebugloggingmayhelpEliminationorsubstitutionhowevermaybetheonlymeanstoverifytherealcause.,NoCoreFile?,Toensureacorefileisproducedonserverfailure:Checkthesystemandusersizelimitoncorefiles,ierunulimit-cOnSolaris,checkthecoredumpsizesettingin/etc/system,iechecksetsys:coredumpsize=0OnLinux,coredumpsaredisabledbydefault,egcheckthelimits.conffilein/etc/securityOnHPUX,checktheuserprocessdatasegmentsize,iesetmaxdsizto134MCheckuserleveldiskquotalimits.Testyoucangetacorefileusing:gcore,GettingLastMinuteThreadDumps,AthreaddumpisatextualsnapshotofallactivethreadsinaJVMprocess.Tocapturethestateofthreadsjustbeforefailure:Enablethefollowingonserverstartup:SunJVM:-XX:+ShowMessageBoxOnErrorJRockitJVM:-Djrockit.waitonerrorEnsuretheserverisstartedinforeground.TheniftheJVMcrashes,apromptwillappear:Doyouwanttodebugtheproblem?Beforeansweringthisprompt,youcantakeathreaddumpoftheJVM!,Togetathreaddump:Use:weblogic.AdminTHREAD_DUMPOnUnixplatforms,use:kill-3OnWindows,followthesesteps:,TogetaserverprocesssthreaddumponWindows:GototheserversCommandPromptwindow.RightclickonthetitlebarandselectProperties.OntheLayouttab,underScreenBufferSize,setHeightto2000.ClickOK.Tooutputthethreaddumptothecommandwindow,press:Ctrl-BreakScrollbackintheoutputtothebeginningofthedump,whichstartswiththewords:Fullthreaddump,GettingaThreadDump,OverviewofCoreFileTools,Optionsforcoreinvestigation:JVMlogfilemaybeavailablewithdetailsofthefailure:SunJVMBEAsJRockitUsenativestacktraceandlibrarymapfiles,egpstack,pmapandpflagsUseadebuggertogetstacktracedetailsofthefailure.Athreaddumpmayalsobeusefulundersomecircumstances,egwhenJNIlibrariesarethecause.,StandardInvestigationTools,Utilitiestodiagnosethecorefileareavailableonmostplatforms.Youmayneedtodownloadthetool:Ifavailablealsouse:pflags,Usingpstack,pstackgivesanativestacktraceforeachlightweightthreadintheprocess.,Examplepstackoutput:corecoreof20956:/wwsl/sharedInstalls/solaris/wls70sp2/jdk131_06/bin/./bin/sparc/nativ-lwp#14/thread#25-ff369764_sigprocmask(ff36bf60,0,0,e6181d70,ff37e000,0)+8ff35e110_sigon(e6181d70,ff385930,6,e6180114,e6181d70,6)+d0ff361150_thrp_kill(0,19,6,ff37e000,19,ff2c0450)+f8ff24b900raise(6,0,0,ffffffff,ff2c03bc,4)+40ff2358ecabort(ff2bc000,e6180268,0,fffffff8,4,e6180289)+100fe3c68fc_1cCosFabort6Fl_v_(1,fe4c8000,1,e61802e8,0,e9f90420)+b8fe3c59f0_1cCosbBhandle_unexpected_exception6FpnGThread_ipCpv_v_(ff2c02ac,fe53895c,fe4dc164,fe470ab4,fe4c8000,e6180308)+254fe20a8b4JVM_handle_solaris_signal(0,25d5b8,e6180d90,fe4c8000,b,e6181048)+8ecff36b824_sighndlr(b,e6181048,e6180d90,fe20a8cc,e6181e14,e6181e04)+cff3684d8sigacthandler(b,e6181d70,0,0,0,ff37e000)+708-calledfromsignalhandlerwithsignal11(SIGSEGV)-e9f90420Java_HelloWorld_displayHelloWorld(25d644,e6181224,e61819b8,0,2,0)+3000090ae4?(e6181224,e61819b8,25d5b8,fe4c8000,0,109a0).,Usingpmap,pmapprovidesprocessaddressspaceinformationUsetodeterminewherethecrashoccurred.,Examplepmapoutput:.E95000001184KreadE96800001392KreadE98000004608KreadE9F60000136Kread/write/execE9F900008Kread/exec/home/usera/wls70/solaris/projectWork/lib/libhello.soE9FA00008Kread/write/exec/home/usera/wls70/solaris/projectWork/lib/libhello.soE9FB40008Kread/write/execE9FC0000120Kread/exec/usr/lib/libelf.so.1E9FEE0008Kread/write/exec/usr/lib/libelf.so.1.,TheSunJVMLogFile,Additionally,theSunJVMmayproducealogfilewithdetailsofthelibrarythatcausedthecore.TheJVMslogfilewillbe:LocatedinthedirectorywheretheserverwasstartedNamedhs_err_pid.logwhereistheprocessIDoftheJVMprocess.AsimilarfileisproducedbyBEAsJRockitJVM.,ExampleSunJVMLogFile,TheJVMlogfilemayshowwherefailureoccurred.,AnunexpectedexceptionhasbeendetectedinnativecodeoutsidetheVM.UnexpectedSignal:11occurredatPC=0 x5a4cf2e4Functionname=Java_HelloWorld_displayHelloWorldLibrary=/home/spoz/wls70/linuxAS/user_projects/mydomain/lib/libhello.soCurrentJavathread:atHelloWorld.displayHelloWorld(NativeMethod)atservlets.NativeServlet.doGet(NativeServlet.java:85)atjavax.servlet.http.HttpServlet.service(HttpServlet.java:740)atjavax.servlet.http.HttpServlet.service(HttpServlet.java:853).LocalTime=Wed1709:35:392004ElapsedTime=186#TheexceptionwasdetectedinnativecodeoutsidetheVM#JavaVM:JavaHotSpot(TM)ClientVM(1.3.1_06-b01mixedmode),Investigating:OnSolaris,VerifythecorefileisfromtheJVM,ierun:file/coreChecktheJavaDevelopmentKit(JDK)version.Useadebuggertogetastacktraceandthreadinformation:SunSupportrecommendsdbxGNUsgdbmayalsoprovidemoreusefulinformation.Determinewhattypeofnativecodecausedthefailure.,UsingSolarisdbx,Usingdbxtogetstacktraceandthreadinformation:,VerifytheJDKversion:$java-version(gettheJDKversion)$ls/opt/bin/dbxorwhichdbx(getthelocationofdbx)$exportDEBUG_PROG=/opt/bin/dbx(settodbxlocation)Startdbx:$/javacorefile(forJDK1.3.X)or$dbx/javacorefile(forJDK1.4.X)Enterdbxcommands:(dbx)where(showsasummaryofthestack)(dbx)threads(showsthestateoftheexistingthreads)(dbx)quit(exitdbx),Investigating:OnLinux,VerifythecorefileisfromtheJVM,ierun:file/coreChecktheJavaDevelopmentKit(JDK)version.UsethelatestversionofGNUsgdbdebuggertogetastacktraceandthreadinformation.Determinewhattypeofnativecodecausedthefailure.,UsingGNUgdb,Usinggdbtogetstackandthreadinformation:,VerifytheJDKversion:$java-version(gettheJDKversion)$ls/usr/local/bin/gdb(getthelocationofgdb)$exportDEBUG_PROG=/usr/local/bin/gdb(settogdblocation)Startgdb:$/javacorefile(forJDK1.3.X)or$gdb/javacorefile(forJDK1.4.X)Entergdbcommands:(gdb)where(showsasummaryofthestack)(gdb)thr(switchthreadsorshowthecurrentthread)(gdb)infothr(inquireaboutexistingthreads)(gdb)threadapply1bt(backtracetothread#1)(gdb)quit(exitgdb),Usinggdbwhere,Usinggdbwheretogetstackinformation:,Examplewhereoutput:(gdb)where#00 xff369764in_sigprocmask()from/usr/lib/libthread.so.1#10 xff35e978in_resetsig()from/usr/lib/libthread.so.1.#50 xff2358f4inabort()from/usr/lib/libc.so.1#60 xfe3c6904in_1cCosFabort6Fl_v_()from/wwsl/sharedInstalls/solaris/wls70sp2/jdk131_06/jre/lib/sparc/server/libjvm.so#70 xfe3c59f8in_1cCosbBhandle_unexpected_exception6FpnGThread_ipCpv_v_()from/wwsl/sharedInstalls/solaris/wls70sp2/jdk131_06/jre/lib/sparc/server/libjvm.so#80 xfe20a8bcinJVM_handle_solaris_signal()from/wwsl/sharedInstalls/solaris/wls70sp2/jdk131_06/jre/lib/sparc/server/libjvm.so#90 xff36b82cin_sighndlr()from/usr/lib/libthread.so.1#10#110 xe9f90420inJava_HelloWorld_displayHelloWorld()from/home/usera/wls70/solaris/projectWork/lib/libhello.so#120 x90aecin?().,Usinggdbthr,Usinggdbthrtogetcurrentthreadinformation:,Examplethroutput:(gdb)thrCurrentthreadis1(LWP14)(gdb)infothr16LWP130 xff29d194in_poll()from/usr/lib/libc.so.115LWP120 xff29f008in_lwp_sema_wait()from/usr/lib/libc.so.114LWP110 xff29f008in_lwp_sema_wait()from/usr/lib/libc.so.113LWP100 xff29bc2cin_so_accept()from/usr/lib/libc.so.112LWP90 xff29bc2cin_so_accept()from/usr/lib/libc.so.111LWP80 xff29d194in_poll()from/usr/lib/libc.so.110LWP70 xff29d194in_poll()from/usr/lib/libc.so.19LWP60 xff29f008in_lwp_sema_wait()from/usr/lib/libc.so.18LWP50 xff29f008in_lwp_sema_wait()from/usr/lib/libc.so.17LWP40 xff29f008in_lwp_sema_wait()from/usr/lib/libc.so.16LWP30 xff29d194in_poll()from/usr/lib/libc.so.15LWP20 xff29e958in_signotifywait()from/usr/lib/libc.so.14LWP10 xff29d194in_poll()from/usr/lib/libc.so.13LWP160 xff29c4fcindoor_restart()from/usr/lib/libc.so.12LWP150 xff369774inprivate_lwp_cond_wait()from/usr/lib/libthread.so.1*1LWP140 xff369764in_sigprocmask()from/usr/lib/libthread.so.1,Usinggdbbt,Usinggdbbttogetstacktraceforagiventhread:,Examplethreadbtoutput:(gdb)threadapply1btThread1(LWP14):#00 xff369764in_sigprocmask()from/usr/lib/libthread.so.1#10 xff35e978in_resetsig()from/usr/lib/libthread.so.1#20 xff35e118in_sigon()from/usr/lib/libthread.so.1#30 xff361158in_thrp_kill()from/usr/lib/libthread.so.1#40 xff24b908inraise()from/usr/lib/libc.so.1#50 xff2358f4inabort()from/usr/lib/libc.so.1#60 xfe3c6904in_1cCosFabort6Fl_v_()from/wwsl/sharedInstalls/solaris/wls70sp2/jdk131_06/jre/lib/sparc/server/libjvm.so#70 xfe3c59f8in_1cCosbBhandle_unexpected_exception6FpnGThread_ipCpv_v_()from/wwsl/sharedInstalls/solaris/wls70sp2/jdk131_06/jre/lib/sparc/server/libjvm.so#80 xfe20a8bcinJVM_handle_solaris_signal()from/wwsl/sharedInstalls/solaris/wls70sp2/jdk131_06/jre/lib/sparc/server/libjvm.so#90 xff36b82cin_sighndlr()from/usr/lib/libthread.so.1#10#110 xe9f90420inJava_HelloWorld_displayHelloWorld()from/home/usera/wls70/solaris/projectWork/lib/libhello.so.,Investigating:OnHPUX,VerifythecorefileisfromtheJVM,ierun:file/coreChecktheJavaDevelopmentKit(JDK)version.Useadebuggertogetastacktraceandthreadinformation:HPUXprovidesadbwdbGNUsgdbmayalsoprovideusefulinformation.Determinewhattypeofnativecodecausedthefailure.,UsingHPUXwdb,Usingwdbtoviewstackinformation:,bj71s063/casedata/zhangyj#gdb/opt/sanmgr/jre/bin/IA64N/javacore.2511HPgdb5.2forHPItanium(32or64bit)andtargetHP-UX11.2x.Copyright1986-2001FreeSoftwareFoundation,Inc.Hewlett-PackardWildebeest5.2(basedonGDB)iscoveredbytheGNUGeneralPublicLicense.Typeshowcopyingtoseetheconditionstochangeitand/ordistributecopies.Typeshowwarrantyforwarranty/support.Corewasgeneratedbyjava.Unknownsi_code.ReporttoHP.Badfunctionget_java_mutex_info#00 x60000000c04db090:0in_ksleep+0 x30()from/usr/lib/hpux32/libc.so.1(gdb)helpjavaJavaandJVMdebuggingcommands.Listofjavasubcommands:javaargs-ShowthecurrentorspecifiedJavaframeargumentsinfojavabytecodes-DisassemblethegivenJavamethodsbytecodesjavaheap-histogram-ShowtheJavaheapobjecthistogramjavainstances-FindalltheinstancesofthegivenklassOopintheJavaheapjavajvm-state-ShowJavavirtualmachinescurrentinternalstatesjavalocals-ShowthecurrentorspecifiedJavaframelocalsinfojavamutex-info-Printoutdetailsofthestaticmutexesjavaobject-PrintoutthegivenJavaobjectsfieldsinfojavaoop-FindtheJavaobjectoopofthegivenJavaheapaddressjavareferences-FindallthereferencestothegivenJavaobjectintheJavaheapjavaunwind-info-Showtheunwindinfoofthecodewherethegivenpcislocatedjavaunwind-table-PrintoutthedynamicallygeneratedJavaUnwindTable,Investigating:OnAIX,VerifythecorefileisfromtheJVM,ierun:file/coreChecktheJavaDevelopmentKit(JDK)version.UsetheJVMprocesssjavacorefiletogetcurrentthreadinformation.Determinewhattypeofnativecodecausedthefailure.dbx,UsingAIXjavacoreFile,Usejavacore.txtfiletogetcurrentthreadinformation:,CurrentThreadDetails:ExecuteThread:10forqueue:default(TID:0 x31c70ad0,sys_thread_t:0 x3e52df68,state:R,nativeID:0 xf10)prio=5atHelloWorld.displayHelloWorld(NativeMethod)atservlets.NativeServlet.doGet(NativeServlet.java:85)atjavax.servlet.http.HttpServlet.service(HttpServlet.java:740)atjavax.servlet.http.HttpServlet.service(HttpServlet.java:853)ernal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1058)ernal.ServletStubImpl.invokeServlet(ServletStubImpl.java:401)ernal.ServletStubImpl.invokeServlet(ServletStubImpl.java:306).,Investigating:OnWindows,OnWindows,aDrWatsonlogfiledrwtsn32.logissimilartoaUnixcorefile.Thelogfileiscreatedin:c:DocumentsandSettingsAllUsersDocumentsDrWatsonUseDrWatsontoinvestigatethefailure.AlsotheJVMshs_err_pid.logfile(ifpresent)mayalsocontainusefulinformation.Determinewhattypeofnativecodecausedthefailure.,RoadMap,ServerCorePatternServerCoreInvestigationCausesofServerCoreWebLogicServerPerformancePackType2JDBCDriverJNIAccesstoNativeLibrariesTheJVM,CausesofaServerCore,Remember,JavacodedoesNOTcauseacorefile,insteadanExceptionisthrownandtypicallylogged.Failingnative(egCorC+)codewillcauseaserversJVMtofailandaservercorefileisproduced.Nativecodeisfoundin:WebLogicServerNativePerformancePacksType2JDBCDriversApplicationcodethataccessesnativelibrarieswithJavaNativeInterface(JNI)callsTheJVMitself.,WLSNativePerformancePacks,Performancepacksuseanativesocketmultiplexertoimproveserverperformance.Performancepacksaregenerallyenabledbydefault.PerformancepackscanbedisabledviatheAdminConsoleorontheWebLogicServerstartcommand.SetNativeIOEnabledtofalse.Disabletheperformancepacks,toverifywhetherthisisthecauseoftheservercore.Howeverdisablingtheperformancepackscanimpacttheserversperformance.,Type2JDBCDrivers,Type2driversconvertsstandardJDBC(Java)methodcallsintonativedatabaseAPIcalls.Ifpossible,switchtoanall-Java(type4)drivertoverifythisisthecauseoftheservercore.IfsubstitutionisNOTpossible,logginganddebuggingmayidentifywhyfailuresoccur.,JavaNativeInterface(JNI)Calls,JavaprogramsuseJNItooperatewithnativelanguageapplicationsandlibraries,egC,C+orassembler.Itisgenerallydifficulttosubstituteoreliminatetheselibraries,toverifythisisthecauseoftheservercore.Additionallogginganddebuggingmayberequiredtodetermineunderwhatconditionsthefailuresoccur.Theproblemmaybedueto:IncorrectuseoftheJNIinterfaceTheJNIlibrariesOrtheunderlyingnativecode.,TheJavaVirtualMachine,TheJVMisaJavacodeinterpreter,whichtranslatesJavacodeintonativeplatformoperations.Ifpossible,substituteadifferentJVMoralaterrelease,toverifythisisthecauseoftheservercore.JustInTime(JIT)compiler:ManyJVMbugsinvolvetheuseofaJITcompilerTodisableJIT,Sun/HPJDK:-Xint-XfutureIBMJDK:-Dpiler=NONEBEAjRockit:-Xnoopt,Pattern2,HighCPUusage,HighCPUUsagePatternProcesses,ThreadsandCPUUsageSymptomsofHighCPUUsageHighCPUUsageInvestigation,RoadMap,ProcessesandThreads,AProcess:IsaninstanceofarunningprogramwhichhasitsowndataandisolatingagainstotherprocessesIsidentifiedbyanoperatingsystemprocessID(PID)Maybesingleormulti-threaded.AThread:Isasub-taskofaprocessWilluseresources,egCPUindependentlyofotherthreadsMaymaptoanoperatingsystemprocessID(PID)Maybeidentifiedbyalight-weightprocessid(LWPID),whichrelatestotheparentprocess.,WebLogicServer,AWebLogicServerinstanceis:AninstanceofaJVM,whichrunstheweblogic.ServerclassAmulti-threadedprocess,wherethreadsareeither:SocketReaderthreads,forhandingnetworktrafficExecutethreads,forprocessinguserrequests.,CPUUsage,AmachinesCPU(s)processonbehalfof:MultipleprocessesonthemachineMultiplethreadswithinaprocess.,HighCPUUsage,HighCPUusageoccurswhenoneprocessorthreadusesanunexpectedlyhighpercentageoftheCPUMaydepriveorstarveotherprocessesorthreadsofCPUpowerforperformingtheirrequiredprocessingShouldbechecked(monitoredfor)periodically.,HighCPUUsageSymptoms,SymptomsofhighCPU:SlowresponsetimetotheusersWebLogicServermachinebecomesunusuallyslowRequestsoroperationsstarttotimeout.MonitorCPUutilizationwiththefollowingtools:OnWindows:TaskManagerorPerfMonOnUnix:iostat,HighCPUUsagePatternHighCP