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WebLogicServer性能監控與調優

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)軟件授權：自從oracle收購了bea之后，WebLogic的序列號全都開放了，沒有必要再去進行破解了。2

WebLogic主要使用

的JVMSUNHotSpotJVMBEAJRockitJVM不同的JVM，其可設置的參數和監控的工具將是不同，后面將分別介紹這兩種JVM的設置。在Intel架構和windows平臺上，建議使用JRockitJVM，這樣可以帶來更優的性能。3

WebLogic實例主要設置內容啟動參數設置主要是設置GC參數線程設置主要是設置線程的數量數據庫連接池的設置主要是設置連接池的初始容量和最大容量4

WebLogic8.1啟動文件%DOMAIN_HOME%/startWebLogic.cmd設置實例的運行模式：開發模式/生產模式設置JAVA_HOME設置JAVA_VM：client/server/jrockit設置MEM_ARGS%WL_HOME%\common\bin\commEnv.cmd設置所有實例都統一使用的參數5

WebLogic9.2啟動文件%WL_HOME%\common\bin\commEnv.cmd設置所有實例統一的運行參數%DOMAIN_HOME%\bin\setDomainEnv.cmd設置本實例的運行參數%DOMAIN_HOME%\bin\startWebLogic.cmd運行啟動腳本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實例的線程設置...線程的設置主要是在weblogic控制臺中完成12

.WebLogic8.1實例的線程設置..13

..WebLogic

8.1實例的線程設置.14

…WebLogic

8.1實例的線程設置15

WebLogic9.2實例的線程設置.線程管理與WebLogic8.1存在很大的不同，由WebLogic自動去管理。默認情況下，WebLogic提供的線程數量較小，并且在管理控制臺上沒有修改線程數量的鏈接。16

.WebLogic9.2實例的線程設置可以通過手動修改config.xml文件，使用與weblogic8.1相同的線程設置風格。主要是在<server>中添加以下代碼：17

數據連接池、數據源的主要配置連接池的初始容量、最大容量、增長容量。是否啟用連接泄露配置。是否測試數據庫連接。數據庫連接的時間設置。18

OracleRAC集群OracleRAC(OracleRealApplicationCluster)，Oracle數據庫的集群。基于共享存儲的數據庫，具有多個數據庫運行實例。tnsnames.ora形式與常規模式不同。19

OracleRAC的數據源配置url采用oracletnsname配置的方式：配置WebLogic多池數據源方式：Multipool（WebLogic8.1）多數據源（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里自帶的一個監控jvm運行狀況的工具。%JAVA_HOME%/bin/jvisualvm.exe24

OracleJRockitMissionControlWindows平臺下，性能較優的JVM。提供的很好的監控工具，用于監控WebLogic的運行狀況。針對不同的JDK版本，都有對應的安裝程序。可以從Oracle網站免費下載/technetwork/middleware/jrockit/overview/index.html25

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BEAJRockitMissionControlBEAJRockitshipswithBEAJRockitMissionControl.Theseareagroupofindependentmanagementandmonitoringtools.BEAJRockitManagementConsoleJMXComplaintmonitoringtoolBEAJRockitRuntimeAnalyzerRecordsandhelpsyouanalyzeJVMandrunningapplicationBEAJRockitMemoryLeakDetectorDetectsandfindsthecauseformemoryleaksThemainfocusofJRockitMissionControlistodothenecessaryinstrumentationwiththelowestpossibleimpactonthesystem.27

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