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资源说明：JVM Option Analyzer - A java based tool to list jvm settings of a local or a remote jvm
Print the jvm settings of the current jvm: Code: java -jar jvmoa-1.0.0.jar Output: C:\development\java\workspaces\sts2.8.0\de.tutorials.training\deploy>java -jar jvmoa-1.0.0.jar Okt 19, 2011 9:13:26 PM de.tutorials.java.jvm.tools.optionanalyzer.AbstractJvmOptionsAnalyzer printCurrentJVMVersion Information: 1.7.0 21.0-b17 Java HotSpot(TM) 64-Bit Server VM Oracle Corporation Okt 19, 2011 9:13:26 PM de.tutorials.java.jvm.tools.optionanalyzer.AbstractJvmOptionsAnalyzer printJvmOptionSummary Information: ##### JvmOptionSummary: Okt 19, 2011 9:13:26 PM de.tutorials.java.jvm.tools.optionanalyzer.AbstractJvmOptionsAnalyzer printJvmOptionSummary Information: Options in Category: product: 478 Okt 19, 2011 9:13:26 PM de.tutorials.java.jvm.tools.optionanalyzer.AbstractJvmOptionsAnalyzer printJvmOptionSummary Information: ##### Okt 19, 2011 9:13:26 PM de.tutorials.java.jvm.tools.optionanalyzer.AbstractJvmOptionsAnalyzer printCurrentJVMOptions Information: #### Options in Category: product 478 JvmOption [name=AdaptivePermSizeWeight, origin=DEFAULT, value=20, writeable=false] JvmOption [name=AdaptiveSizeDecrementScaleFactor, origin=DEFAULT, value=4, writeable=false] JvmOption [name=AdaptiveSizeMajorGCDecayTimeScale, origin=DEFAULT, value=10, writeable=false] JvmOption [name=AdaptiveSizePausePolicy, origin=DEFAULT, value=0, writeable=false] .... Print the jvm settings of a remote jvm: 1) Start your App with JXM Remote enabled e.g.: Code: "C:\Program Files\Java\jdk1.6.0_27\bin\java" -cp jvmoa-1.0.0.jar -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=4711 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false de.tutorials.java.App 2) Start jvmOptionAnalyzer with -remote Flag java -jar jvmoa-1.0.0.jar -remote=service:jmx:rmi:///jndi/rmi://localhost:4711/jmxrmi Output: C:\development\java\workspaces\sts2.8.0\de.tutorials.training\deploy>java -jar jvmoa-1.0.0.jar -remote=service:jmx:rmi:///jndi/rmi://localhost:4711/jmxrmi Okt 19, 2011 9:21:13 PM de.tutorials.java.jvm.tools.optionanalyzer.AbstractJvmOptionsAnalyzer printCurrentJVMVersion Information: 1.6.0_27 20.2-b06 Java HotSpot(TM) 64-Bit Server VM Sun Microsystems Inc. Okt 19, 2011 9:21:13 PM de.tutorials.java.jvm.tools.optionanalyzer.AbstractJvmOptionsAnalyzer printJvmOptionSummary Information: ##### JvmOptionSummary: Okt 19, 2011 9:21:13 PM de.tutorials.java.jvm.tools.optionanalyzer.AbstractJvmOptionsAnalyzer printJvmOptionSummary Information: Options in Category: product: 478 Okt 19, 2011 9:21:13 PM de.tutorials.java.jvm.tools.optionanalyzer.AbstractJvmOptionsAnalyzer printJvmOptionSummary Information: ##### Okt 19, 2011 9:21:13 PM de.tutorials.java.jvm.tools.optionanalyzer.AbstractJvmOptionsAnalyzer printCurrentJVMOptions Information: #### Options in Category: product 478 JvmOption [name=AdaptivePermSizeWeight, origin=DEFAULT, value=20, writeable=false] JvmOption [name=AdaptiveSizeDecrementScaleFactor, origin=DEFAULT, value=4, writeable=false] JvmOption [name=AdaptiveSizeMajorGCDecayTimeScale, origin=DEFAULT, value=10, writeable=false] JvmOption [name=AdaptiveSizePausePolicy, origin=DEFAULT, value=0, writeable=false] JvmOption [name=AdaptiveSizePolicyCollectionCostMargin, origin=DEFAULT, value=50, writeable=false] JvmOption [name=AdaptiveSizePolicyInitializingSteps, origin=DEFAULT, value=20, writeable=false] JvmOption [name=AdaptiveSizePolicyOutputInterval, origin=DEFAULT, value=0, writeable=false] JvmOption [name=AdaptiveSizePolicyWeight, origin=DEFAULT, value=10, writeable=false] JvmOption [name=AdaptiveSizeThroughPutPolicy, origin=DEFAULT, value=0, writeable=false] ... BTW There is another way for listing all jvm option values: Code: java -XX:+UnlockDiagnosticVMOptions -XX:+PrintFlagsFinal -version I don't now how long this flag is already in the jvm but it works at least for Sun / Oracle Java 1.6.0_21
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