WebLogic Server 性能监控与调优

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WebLogicServer性能监控与调优

Overview-1WebLogic的版本WebLogicServer8.1(Java1.4、J2EE1.3)WebLogicServer9.x(Java5、J2EE1.4)WebLogicServer10.0(Java5、JavaEE5)WebLogicServer10.3(Java6、JavaEE5)WebLogicServer11gR1(10.3.x)(Java6、JavaEE5)软件授权：自从oracle收购了bea之后，WebLogic的序列号全都开放了，没有必要再去进行破解了。2

WebLogic主要使用

的JVMSUNHotSpotJVMBEAJRockitJVM不同的JVM，其可设置的参数和监控的工具将是不同，后面将分别介绍这两种JVM的设置。在Intel架构和windows平台上，建议使用JRockitJVM，这样可以带来更优的性能。3

WebLogic实例主要设置内容启动参数设置主要是设置GC参数线程设置主要是设置线程的数量数据库连接池的设置主要是设置连接池的初始容量和最大容量4

WebLogic8.1启动文件%DOMAIN_HOME%/startWebLogic.cmd设置实例的运行模式：开发模式/生产模式设置JAVA_HOME设置JAVA_VM：client/server/jrockit设置MEM_ARGS%WL_HOME%\common\bin\commEnv.cmd设置所有实例都统一使用的参数5

WebLogic9.2启动文件%WL_HOME%\common\bin\commEnv.cmd设置所有实例统一的运行参数%DOMAIN_HOME%\bin\setDomainEnv.cmd设置本实例的运行参数%DOMAIN_HOME%\bin\startWebLogic.cmd运行启动脚本6

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SunHotSpotHeap分布Heapisdividedbroadlyintothreeareas:Young(New)generationTenured(Old)generationPermanent(Perm)generationYounggenerationisfurtherdividedinto:EdenSurvivorspaces(2)Xmx8

TuningGCManually…Newself-tuningfeatureisnotavailablewhiletuningJVMspriortoversion1.5andmanualtuningisrequired.Thefollowingarethecommontuningparametersavailablewhiletuningthegarbagecollectionmanually:Sizeofthetheoverallheap-Xms[n]-Xmx[n]Sizeofthegenerationsintheheap-XX:NewSize=n-XX:MaxNewSize=n-XX:NewRatio=n9

…TuningGCManuallyCommontuningparameters(continued)Thesizeofthesurvivorspacesintheyounggeneration-XX:SurvivorRatio=nThesizeofthepermanentgeneration-XX:PermSize=n-XX:MaxPermSize=nThethresholdforpromotionfromtheyounggenerationtotheoldgeneration-XX:MaxTenuringThreshold=nTuninginvolveseitheraseriesofexperimentswithaspecializedtool(or)goodjudgmenttodecidethatGCwasperformingwell.TuningSunHotSpotJVM-3810

JRockitBenefitsWeblogicJRockitJVMisdesignedforserver-sideapplications.Itemploysadaptiveoptimizationtosignificantlyimproveruntimeperformance.Ithasadaptivegarbagecollectionandheapmanagement.Itoffersfullsupportfor32and64bitJRockitonIntelEM64T/AMD64andcompatibles.JRockitalsosupportsSolaris/Sparcarchitecture.Itofferssupportforverylargeheapson64bitplatforms.JRockitMissionControltoolssuiteoffersbettermanagement,tuningandtroubleshooting.11

GenerationalHeap-JRockitInthetwo-generationalmodel,heapisdividedintotwogenerationsYounggeneration(Nursery)OldgenerationInasingle-spacedmodel,alltheobjectsareallocatedinasinglespaceontheheap.NurseryOldSpaceXnsXmxXmxWebLogic8.1实例的线程设置...线程的设置主要是在weblogic控制台中完成12

.WebLogic8.1实例的线程设置..13

..WebLogic

8.1实例的线程设置.14

…WebLogic

8.1实例的线程设置15

WebLogic9.2实例的线程设置.线程管理与WebLogic8.1存在很大的不同，由WebLogic自动去管理。默认情况下，WebLogic提供的线程数量较小，并且在管理控制台上没有修改线程数量的链接。16

.WebLogic9.2实例的线程设置可以通过手动修改config.xml文件，使用与weblogic8.1相同的线程设置风格。主要是在<server>中添加以下代码：17

数据连接池、数据源的主要配置连接池的初始容量、最大容量、增长容量。是否启用连接泄露配置。是否测试数据库连接。数据库连接的时间设置。18

OracleRAC集群OracleRAC(OracleRealApplicationCluster)，Oracle数据库的集群。基于共享存储的数据库，具有多个数据库运行实例。tnsnames.ora形式与常规模式不同。19

OracleRAC的数据源配置url采用oracletnsname配置的方式：配置WebLogic多池数据源方式：Multipool（WebLogic8.1）多数据源（WebLogic9.2）20

SunHotSpot－JConsole21

JConsoleisaJMX-compliantGUItoolthatconnectstoarunningJVM,whichisstartedwiththemanagementagent.JDK5.0includesthemonitoringandmanagementtool,JConsole.JConsoleallowsyoutoseeinsidetheJVMandtheapplicationwhileit'srunning.JConsoleprovidesrealtimeviewingoftheperformanceofapplicationsandshowstheirresourceconsumption.22

…JConsole…ThemanagementagentintheJVMshouldbestartedformonitoring.ItcanonlyconnecttooneJVMatanytime.TouseJConsoleforconnectingtoaJVMlocally,WebLogicServershouldbestartedwiththeoptiontoenablethemanagementagent.-Dcom.sun.management.jmxremote23

JconsoleRemoteMonitoringToenabletheJMXagent(JConsole)forremoteaccess,setthissystempropertywhenyoustartWebLogicServerorJVM:Dcom.sun.management.jmxremote.port=portNoConnectingremotelythroughJConsoleistherecommendedwaywhenmonitoringormanagingproductionenvironments.TuningSunHotSpotJVM-12SUNHotSpot－jvisualvmJava6里自带的一个监控jvm运行状况的工具。%JAVA_HOME%/bin/jvisualvm.exe24

OracleJRockitMissionControlWindows平台下，性能较优的JVM。提供的很好的监控工具，用于监控WebLogic的运行状况。针对不同的JDK版本，都有对应的安装程序。可以从Oracle网站免费下载/technetwork/middleware/jrockit/overview/index.html25

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BEAJRockitMissionControlBEAJRockitshipswithBEAJRockitMissionControl.Theseareagroupofindependentmanagementandmonitoringtools.BEAJRockitManagementConsoleJMXComplaintmonitoringtoolBEAJRockitRuntimeAnalyzerRecordsandhelpsyouanalyzeJVMandrunningapplicationBEAJRockitMemoryLeakDetectorDetectsandfindsthecauseformemoryleaksThemainfocusofJRockitMissionControlistodothenecessaryinstrumentationwiththelowestpossibleimpactonthesystem.27

ManagementServerThemanagementserverintheJRockitVMisdisabledbydefault.Toenablethemanagementserver,addthefollowingcommand-lineargumenttotheJVMstartscript:java-Xmanagement…weblogic.ServerThedefaultportthatthemanagementserverus