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Java启动参数(-, -X, -XX参数)的使用

作者：guyue35

本文主要介绍了Java启动参数(-, -X, -XX参数)的使用，文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值，需要的朋友们下面随着小编来一起学习学习吧

Java启动参数分类

一、JVM标准参数(-)

获取方法: java -help

JVM的标准参数都是以”-“开头，通过输入”java -help”或者”java -?”，可以查看JVM标准参数列表。如

这里写代码片

以下是JVM标准参数的详细介绍(加粗标记的参数请着重注意):

-client

设置jvm使用client模式，特点是启动速度比较快，但运行时性能和内存管理效率不高，通常用于客户端应用程序或者PC应用开发和调试。

-server

设置jvm使server模式，特点是启动速度比较慢，但运行时性能和内存管理效率很高，适用于生产环境。在具有64位能力的jdk环境下将默认启用该模式，而忽略-client参数。

-agentlib:libname[=options]

用于装载本地lib包；

其中libname为本地代理库文件名，默认搜索路径为环境变量PATH中的路径，options为传给本地库启动时的参数，多个参数之间用逗号分隔。在Windows平台上jvm搜索本地库名为libname.dll的文件，在linux上jvm搜索本地库名为libname.so的文件，搜索路径环境变量在不同系统上有所不同，比如Solaries上就默认搜索LD_LIBRARY_PATH。

比如：-agentlib:hprof

用来获取jvm的运行情况，包括CPU、内存、线程等的运行数据，并可输出到指定文件中；windows中搜索路径为JRE_HOME/bin/hprof.dll。

-agentpath:pathname[=options]

按全路径装载本地库，不再搜索PATH中的路径；其他功能和agentlib相同；更多的信息待续，在后续的JVMTI部分会详述。

-classpath classpath

-cp classpath

告知jvm搜索目录名、jar文档名、zip文档名，之间用分号;分隔；使用-classpath后jvm将不再使用CLASSPATH中的类搜索路径，如果-classpath和CLASSPATH都没有设置，则jvm使用当前路径(.)作为类搜索路径。

jvm搜索类的方式和顺序为：Bootstrap，Extension，User。

Bootstrap中的路径是jvm自带的jar或zip文件，jvm首先搜索这些包文件，用System.getProperty(“sun.boot.class.path”)可得到搜索路径。

Extension是位于JRE_HOME/lib/ext目录下的jar文件，jvm在搜索完Bootstrap后就搜索该目录下的jar文件，用System.getProperty(“java.ext.dirs”)可得到搜索路径。

User搜索顺序为当前路径.、CLASSPATH、-classpath，jvm最后搜索这些目录，用System.getProperty(“java.class.path”)可得到搜索路径。

-Dproperty=value

设置系统属性名/值对，运行在此jvm之上的应用程序可用System.getProperty(“property”)得到value的值。

如果value中有空格，则需要用双引号将该值括起来，如-Dname=”space string”。

该参数通常用于设置系统级全局变量值，如配置文件路径，以便该属性在程序中任何地方都可访问。

-enableassertions[:”…” | : ]

-ea[:”…” | : ]

上述参数就用来设置jvm是否启动断言机制（从JDK 1.4开始支持），缺省时jvm关闭断言机制。

用-ea 可打开断言机制，不加和classname时运行所有包和类中的断言，如果希望只运行某些包或类中的断言，可将包名或类名加到-ea之后。例如要启动包com.wombat.fruitbat中的断言，可用命令java -ea:com.wombat.fruitbat…。

-disableassertions[:”…” | :

二、JVM非标准参数(-X)

获取方法: java -X

通过”java -X”可以输出非标准参数列表，如下所示：

非标准参数又称为扩展参数，其列表如下：

-Xint

设置jvm以解释模式运行，所有的字节码将被直接执行，而不会编译成本地码。

-Xbatch

关闭后台代码编译，强制在前台编译，编译完成之后才能进行代码执行；

默认情况下，jvm在后台进行编译，若没有编译完成，则前台运行代码时以解释模式运行。

-Xbootclasspath:bootclasspath

让jvm从指定路径（可以是分号分隔的目录、jar、或者zip）中加载bootclass，用来替换jdk的rt.jar；若非必要，一般不会用到；

-Xbootclasspath/a:path

将指定路径的所有文件追加到默认bootstrap路径中；

-Xbootclasspath/p:path

让jvm优先于bootstrap默认路径加载指定路径的所有文件；

-Xcheck:jni

对JNI函数进行附加check；此时jvm将校验传递给JNI函数参数的合法性，在本地代码中遇到非法数据时，jmv将报一个致命错误而终止；使用该参数后将造成性能下降，请慎用。

-Xfuture

让jvm对类文件执行严格的格式检查（默认jvm不进行严格格式检查），以符合类文件格式规范，推荐开发人员使用该参数。

-Xnoclassgc

关闭针对class的gc功能；因为其阻止内存回收，所以可能会导致OutOfMemoryError错误，慎用；

-Xincgc

开启增量gc（默认为关闭）；这有助于减少长时间GC时应用程序出现的停顿；但由于可能和应用程序并发执行，所以会降低CPU对应用的处理能力。

-Xloggc:file

与-verbose:gc功能类似，只是将每次GC事件的相关情况记录到一个文件中，文件的位置最好在本地，以避免网络的潜在问题。

若与verbose命令同时出现在命令行中，则以-Xloggc为准。

-Xms

指定jvm堆的初始大小，默认为物理内存的1/64，最小为1M；可以指定单位，比如k、m，若不指定，则默认为字节。

-Xmx

指定jvm堆的最大值，默认为物理内存的1/4或者1G，最小为2M；单位与-Xms一致。

-Xss

设置单个线程栈的大小，一般默认为512k。

-Xprof

输出 cpu 配置文件数据

-Xrs

减少jvm对操作系统信号（signals）的使用，该参数从1.3.1开始有效；

从jdk1.3.0开始，jvm允许程序在关闭之前还可以执行一些代码（比如关闭数据库的连接池），即使jvm被突然终止；

jvm关闭工具通过监控控制台的相关事件而满足以上的功能；更确切的说，通知在关闭工具执行之前，先注册控制台的控制handler，然后对CTRL_C_EVENT, CTRL_CLOSE_EVENT, CTRL_LOGOFF_EVENT, and CTRL_SHUTDOWN_EVENT这几类事件直接返回true。

但如果jvm以服务的形式在后台运行（比如servlet引擎），他能接收CTRL_LOGOFF_EVENT事件，但此时并不需要初始化关闭程序；为了避免类似冲突的再次出现，从jdk1.3.1开始提供-Xrs参数；当此参数被设置之后，jvm将不接收控制台的控制handler，也就是说他不监控和处理CTRL_C_EVENT, CTRL_CLOSE_EVENT, CTRL_LOGOFF_EVENT, or CTRL_SHUTDOWN_EVENT事件。

上面这些参数中，比如-Xmsn、-Xmxn……都是我们性能优化中很重要的参数；

-Xprof、-Xloggc:file等都是在没有专业跟踪工具情况下排错的好手；

三、JVM非Stable参数（-XX）

获取方法:  java -XX:+PrintFlagsInitial   

Java 6（update 21oder 21之后）版本， HotSpot JVM 提供给了两个新的参数，在JVM启动后，在命令行中可以输出所有XX参数和值。

-XX:+PrintFlagsFinal and -XX:+PrintFlagsInitial

读者可以使用以下语句输出所有的参数和默认值

java -XX:+PrintFlagsInitial >>1.txt 或者 java -XX:+PrintFlagsInitial>>1.txt

由于非State参数非常的多，因此这里就不列出所有参数进行讲解。只介绍我们比较常用的。

Java HotSpot VM中-XX:的可配置参数列表进行描述；

这些参数可以被松散的聚合成三类：

行为参数（Behavioral Options）：用于改变jvm的一些基础行为；

性能调优（Performance Tuning）：用于jvm的性能调优；

调试参数（Debugging Options）：一般用于打开跟踪、打印、输出等jvm参数，用于显示jvm更加详细的信息；

行为参数(功能开关)
-XX:-DisableExplicitGC  禁止调用System.gc()；但jvm的gc仍然有效
-XX:+MaxFDLimit 最大化文件描述符的数量限制
-XX:+ScavengeBeforeFullGC   新生代GC优先于Full GC执行
-XX:+UseGCOverheadLimit 在抛出OOM之前限制jvm耗费在GC上的时间比例
-XX:-UseConcMarkSweepGC 对老生代采用并发标记交换算法进行GC
-XX:-UseParallelGC  启用并行GC
-XX:-UseParallelOldGC   对Full GC启用并行，当-XX:-UseParallelGC启用时该项自动启用
-XX:-UseSerialGC    启用串行GC
-XX:+UseThreadPriorities    启用本地线程优先级
性能调优
-XX:LargePageSizeInBytes=4m 设置用于Java堆的大页面尺寸
-XX:MaxHeapFreeRatio=70 GC后java堆中空闲量占的最大比例
-XX:MaxNewSize=size 新生成对象能占用内存的最大值
-XX:MaxPermSize=64m 老生代对象能占用内存的最大值
-XX:MinHeapFreeRatio=40 GC后java堆中空闲量占的最小比例
-XX:NewRatio=2  新生代内存容量与老生代内存容量的比例
-XX:NewSize=2.125m  新生代对象生成时占用内存的默认值
-XX:ReservedCodeCacheSize=32m   保留代码占用的内存容量
-XX:ThreadStackSize=512 设置线程栈大小，若为0则使用系统默认值
-XX:+UseLargePages  使用大页面内存
调试参数
-XX:-CITime 打印消耗在JIT编译的时间
-XX:ErrorFile=./hs_err_pid<pid>.log 保存错误日志或者数据到文件中
-XX:-ExtendedDTraceProbes   开启solaris特有的dtrace探针
-XX:HeapDumpPath=./java_pid<pid>.hprof  指定导出堆信息时的路径或文件名
-XX:-HeapDumpOnOutOfMemoryError 当首次遭遇OOM时导出此时堆中相关信息
-XX:OnError="<cmd args>;<cmd args>" 出现致命ERROR之后运行自定义命令
-XX:OnOutOfMemoryError="<cmd args>;<cmd args>"  当首次遭遇OOM时执行自定义命令
-XX:-PrintClassHistogram    遇到Ctrl-Break后打印类实例的柱状信息，与jmap -histo功能相同
-XX:-PrintConcurrentLocks   遇到Ctrl-Break后打印并发锁的相关信息，与jstack -l功能相同
-XX:-PrintCommandLineFlags  打印在命令行中出现过的标记
-XX:-PrintCompilation   当一个方法被编译时打印相关信息
-XX:-PrintGC    每次GC时打印相关信息
-XX:-PrintGC Details    每次GC时打印详细信息
-XX:-PrintGCTimeStamps  打印每次GC的时间戳
-XX:-TraceClassLoading  跟踪类的加载信息
-XX:-TraceClassLoadingPreorder  跟踪被引用到的所有类的加载信息
-XX:-TraceClassResolution   跟踪常量池
-XX:-TraceClassUnloading    跟踪类的卸载信息
-XX:-TraceLoaderConstraints 跟踪类加载器约束的相关信息

JDK8-XX参数整理

JDK8 获取所有-XX参数列表

java -XX:+PrintFlagsInitial >>1.txt

1.8所有-XX参数列表

数据类型参数名默认值不清楚干嘛的自己的总结
intxActiveProcessorCount-1{product}
uintxAdaptiveSizeDecrementScaleFactor4{product}
uintxAdaptiveSizeMajorGCDecayTimeScale10{product}
uintxAdaptiveSizePausePolicy0{product}
uintxAdaptiveSizePolicyCollectionCostMargin50{product}
uintxAdaptiveSizePolicyInitializingSteps20{product}
uintxAdaptiveSizePolicyOutputInterval0{product}
uintxAdaptiveSizePolicyWeight10{product}
uintxAdaptiveSizeThroughPutPolicy0{product}
uintxAdaptiveTimeWeight25{product}
boolAdjustConcurrencyfalse{product}
boolAggressiveHeapfalse{product}
boolAggressiveOptsfalse{product}
intxAliasLevel3{C2product}
boolAlignVectortrue{C2product}
intxAllocateInstancePrefetchLines1{product}
intxAllocatePrefetchDistance-1{product}
intxAllocatePrefetchInstr0{product}
intxAllocatePrefetchLines3{product}
intxAllocatePrefetchStepSize16{product}
intxAllocatePrefetchStyle1{product}
boolAllowJNIEnvProxyfalse{product}
boolAllowNonVirtualCallsfalse{product}
boolAllowParallelDefineClassfalse{product}
boolAllowUserSignalHandlersfalse{product}
boolAlwaysActAsServerClassMachinefalse{product}
boolAlwaysCompileLoopMethodsfalse{product}
boolAlwaysLockClassLoaderfalse{product}
boolAlwaysPreTouchfalse{product}
boolAlwaysRestoreFPUfalse{product}
boolAlwaysTenurefalse{product}
boolAssertOnSuspendWaitFailurefalse{product}
boolAssumeMPfalse{product}
intxAutoBoxCacheMax128{C2product}
uintxAutoGCSelectPauseMillis5000{product}
intxBCEATraceLevel0{product}
intxBackEdgeThreshold100000{pdproduct}
boolBackgroundCompilationtrue{pdproduct}
uintxBaseFootPrintEstimate268435456{product}
intxBiasedLockingBulkRebiasThreshold20{product}
intxBiasedLockingBulkRevokeThreshold40{product}
intxBiasedLockingDecayTime25000{product}
intxBiasedLockingStartupDelay4000{product}
boolBindGCTaskThreadsToCPUsfalse{product}
boolBlockLayoutByFrequencytrue{C2product}
intxBlockLayoutMinDiamondPercentage20{C2product}
boolBlockLayoutRotateLoopstrue{C2product}
boolBranchOnRegisterfalse{C2product}
boolBytecodeVerificationLocalfalse{product}
boolBytecodeVerificationRemotetrue{product}
boolC1OptimizeVirtualCallProfilingtrue{C1product}
boolC1ProfileBranchestrue{C1product}
boolC1ProfileCallstrue{C1product}
boolC1ProfileCheckcaststrue{C1product}
boolC1ProfileInlinedCallstrue{C1product}
boolC1ProfileVirtualCallstrue{C1product}
boolC1UpdateMethodDatatrue{C1product}
intxCICompilerCount2{product}
boolCICompilerCountPerCPUfalse{product}
boolCITimefalse{product}
boolCMSAbortSemanticsfalse{product}
uintxCMSAbortablePrecleanMinWorkPerIteration100{product}
intxCMSAbortablePrecleanWaitMillis100{manageable}
uintxCMSBitMapYieldQuantum10485760{product}
uintxCMSBootstrapOccupancy50{product}
boolCMSClassUnloadingEnabledtrue{product}
uintxCMSClassUnloadingMaxInterval0{product}
boolCMSCleanOnEntertrue{product}
boolCMSCompactWhenClearAllSoftRefstrue{product}
uintxCMSConcMarkMultiple32{product}
boolCMSConcurrentMTEnabledtrue{product}
uintxCMSCoordinatorYieldSleepCount10{product}
boolCMSDumpAtPromotionFailurefalse{product}
boolCMSEdenChunksRecordAlwaystrue{product}
uintxCMSExpAvgFactor50{product}
boolCMSExtrapolateSweepfalse{product}
uintxCMSFullGCsBeforeCompaction0{product}
uintxCMSIncrementalDutyCycle10{product}
uintxCMSIncrementalDutyCycleMin0{product}
boolCMSIncrementalModefalse{product}
uintxCMSIncrementalOffset0{product}
boolCMSIncrementalPacingtrue{product}
uintxCMSIncrementalSafetyFactor10{product}
uintxCMSIndexedFreeListReplenish4{product}
intxCMSInitiatingOccupancyFraction-1{product}
uintxCMSIsTooFullPercentage98{product}
doubleCMSLargeCoalSurplusPercent0.950000{product}
doubleCMSLargeSplitSurplusPercent1.000000{product}
boolCMSLoopWarnfalse{product}
uintxCMSMaxAbortablePrecleanLoops0{product}
intxCMSMaxAbortablePrecleanTime5000{product}
uintxCMSOldPLABMax1024{product}
uintxCMSOldPLABMin16{product}
uintxCMSOldPLABNumRefills4{product}
uintxCMSOldPLABReactivityFactor2{product}
boolCMSOldPLABResizeQuickerfalse{product}
uintxCMSOldPLABToleranceFactor4{product}
boolCMSPLABRecordAlwaystrue{product}
uintxCMSParPromoteBlocksToClaim16{product}
boolCMSParallelInitialMarkEnabledtrue{product}
boolCMSParallelRemarkEnabledtrue{product}
boolCMSParallelSurvivorRemarkEnabledtrue{product}
uintxCMSPrecleanDenominator3{product}
uintxCMSPrecleanIter3{product}
uintxCMSPrecleanNumerator2{product}
boolCMSPrecleanRefLists1true{product}
boolCMSPrecleanRefLists2false{product}
boolCMSPrecleanSurvivors1false{product}
boolCMSPrecleanSurvivors2true{product}
uintxCMSPrecleanThreshold1000{product}
boolCMSPrecleaningEnabledtrue{product}
boolCMSPrintChunksInDumpfalse{product}
boolCMSPrintEdenSurvivorChunksfalse{product}
boolCMSPrintObjectsInDumpfalse{product}
uintxCMSRemarkVerifyVariant1{product}
boolCMSReplenishIntermediatetrue{product}
uintxCMSRescanMultiple32{product}
uintxCMSSamplingGrain16384{product}
boolCMSScavengeBeforeRemarkfalse{product}
uintxCMSScheduleRemarkEdenPenetration50{product}
uintxCMSScheduleRemarkEdenSizeThreshold2097152{product}
uintxCMSScheduleRemarkSamplingRatio5{product}
doubleCMSSmallCoalSurplusPercent1.050000{product}
doubleCMSSmallSplitSurplusPercent1.100000{product}
boolCMSSplitIndexedFreeListBlockstrue{product}
intxCMSTriggerInterval-1{manageable}
uintxCMSTriggerRatio80{product}
intxCMSWaitDuration2000{manageable}
uintxCMSWorkQueueDrainThreshold10{product}
boolCMSYieldtrue{product}
uintxCMSYieldSleepCount0{product}
uintxCMSYoungGenPerWorker67108864{pdproduct}
uintxCMS_FLSPadding1{product}
uintxCMS_FLSWeight75{product}
uintxCMS_SweepPadding1{product}
uintxCMS_SweepTimerThresholdMillis10{product}
uintxCMS_SweepWeight75{product}
boolCheckEndorsedAndExtDirsfalse{product}
boolCheckJNICallsfalse{product}
boolClassUnloadingtrue{product}
boolClassUnloadingWithConcurrentMarktrue{product}
intxClearFPUAtPark0{product}
boolClipInliningtrue{product}
uintxCodeCacheExpansionSize65536{pdproduct}
uintxCodeCacheMinimumFreeSpace512000{product}
boolCollectGen0Firstfalse{product}
boolCompactFieldstrue{product}
intxCompilationPolicyChoice0{product}
ccstrlistCompileCommand{product}
ccstrCompileCommandFile{product}
ccstrlistCompileOnly{product}
intxCompileThreshold10000{pdproduct}
boolCompilerThreadHintNoPreempttrue{product}
intxCompilerThreadPriority-1{product}
intxCompilerThreadStackSize0{pdproduct}
uintxCompressedClassSpaceSize1073741824{product}
uintxConcGCThreads0{product}
intxConditionalMoveLimit3{C2pd
intxContendedPaddingWidth128{product}
boolConvertSleepToYieldtrue{pdproduct}
boolConvertYieldToSleepfalse{product}
boolCrashOnOutOfMemoryErrorfalse{product}
boolCreateMinidumpOnCrashfalse{product}
boolCriticalJNINativestrue{product}
boolDTraceAllocProbesfalse{product}
boolDTraceMethodProbesfalse{product}
boolDTraceMonitorProbesfalse{product}
boolDebuggingfalse{product}
uintxDefaultMaxRAMFraction4{product}
intxDefaultThreadPriority-1{product}
intxDeferPollingPageLoopCount-1{product}
intxDeferThrSuspendLoopCount4000{product}
boolDeoptimizeRandomfalse{product}
boolDisableAttachMechanismfalse{product}
boolDisableExplicitGCfalse{product}
boolDisplayVMOutputToStderrfalse{product}
boolDisplayVMOutputToStdoutfalse{product}
boolDoEscapeAnalysistrue{C2product}
boolDontCompileHugeMethodstrue{product}
boolDontYieldALotfalse{pdproduct}
ccstrDumpLoadedClassList{product}
boolDumpReplayDataOnErrortrue{product}
boolDumpSharedSpacesfalse{product}
boolEagerXrunInitfalse{product}
intxEliminateAllocationArraySizeLimit64{C2product}
boolEliminateAllocationstrue{C2product}
boolEliminateAutoBoxtrue{C2product}
boolEliminateLockstrue{C2product}
boolEliminateNestedLockstrue{C2product}
intxEmitSync0{product}
boolEnableContendedtrue{product}
boolEnableResourceManagementTLABCachetrue{product}
boolEnableSharedLookupCachetrue{product}
boolEnableTracingfalse{product}
uintxErgoHeapSizeLimit0{product}
ccstrErrorFile{product}
ccstrErrorReportServer{product}
doubleEscapeAnalysisTimeout20.000000{C2product}
boolEstimateArgEscapetrue{product}
boolExitOnOutOfMemoryErrorfalse{product}
boolExplicitGCInvokesConcurrentfalse{product}
boolExplicitGCInvokesConcurrentAndUnloadsClassesfalse{product}
boolExtendedDTraceProbesfalse{product}
ccstrExtraSharedClassListFile{product}
boolFLSAlwaysCoalesceLargefalse{product}
uintxFLSCoalescePolicy2{product}
doubleFLSLargestBlockCoalesceProximity0.990000{product}
boolFailOverToOldVerifiertrue{product}
boolFastTLABRefilltrue{product}
intxFenceInstruction0{ARCHproduct}
intxFieldsAllocationStyle1{product}
boolFilterSpuriousWakeupstrue{product}
ccstrFlightRecorderOptions{product}
boolForceNUMAfalse{product}
boolForceTimeHighResolutionfalse{product}
intxFreqInlineSize325{pdproduct}
doubleG1ConcMarkStepDurationMillis10.000000{product}
uintxG1ConcRSHotCardLimit4{product}
uintxG1ConcRSLogCacheSize10{product}
intxG1ConcRefinementGreenZone0{product}
intxG1ConcRefinementRedZone0{product}
intxG1ConcRefinementServiceIntervalMillis300{product}
uintxG1ConcRefinementThreads0{product}
intxG1ConcRefinementThresholdStep0{product}
intxG1ConcRefinementYellowZone0{product}
uintxG1ConfidencePercent50{product}
uintxG1HeapRegionSize0{product}
uintxG1HeapWastePercent5{product}
uintxG1MixedGCCountTarget8{product}
intxG1RSetRegionEntries0{product}
uintxG1RSetScanBlockSize64{product}
intxG1RSetSparseRegionEntries0{product}
intxG1RSetUpdatingPauseTimePercent10{product}
intxG1RefProcDrainInterval10{product}
uintxG1ReservePercent10{product}
uintxG1SATBBufferEnqueueingThresholdPercent60{product}
intxG1SATBBufferSize1024{product}
intxG1UpdateBufferSize256{product}
boolG1UseAdaptiveConcRefinementtrue{product}
uintxGCDrainStackTargetSize64{product}
uintxGCHeapFreeLimit2{product}
uintxGCLockerEdenExpansionPercent5{product}
boolGCLockerInvokesConcurrentfalse{product}
uintxGCLogFileSize8192{product}
uintxGCPauseIntervalMillis0{product}
uintxGCTaskTimeStampEntries200{product}
uintxGCTimeLimit98{product}
uintxGCTimeRatio99{product}
uintxHeapBaseMinAddress2147483648{pdproduct}
boolHeapDumpAfterFullGCfalse{manageable}
boolHeapDumpBeforeFullGCfalse{manageable}
boolHeapDumpOnOutOfMemoryErrorfalse{manageable}
ccstrHeapDumpPath{manageable}
uintxHeapFirstMaximumCompactionCount3{product}
uintxHeapMaximumCompactionInterval20{product}
uintxHeapSizePerGCThread87241520{product}
boolIgnoreEmptyClassPathsfalse{product}
boolIgnoreUnrecognizedVMOptionsfalse{product}
uintxIncreaseFirstTierCompileThresholdAt50{product}
boolIncrementalInlinetrue{C2product}
uintxInitialBootClassLoaderMetaspaceSize4194304{product}
uintxInitialCodeCacheSize2555904{pdproduct}
uintxInitialHeapSize0{product}
uintxInitialRAMFraction64{product}
doubleInitialRAMPercentage1.562500{product}
uintxInitialSurvivorRatio8{product}
uintxInitialTenuringThreshold7{product}
uintxInitiatingHeapOccupancyPercent45{product}
boolInlinetrue{product}
ccstrInlineDataFile{product}
intxInlineSmallCode1000{pdproduct}
boolInlineSynchronizedMethodstrue{C1product}
boolInsertMemBarAfterArraycopytrue{C2product}
intxInteriorEntryAlignment16{C2pd
intxInterpreterProfilePercentage33{product}
boolJNIDetachReleasesMonitorstrue{product}
boolJavaMonitorsInStackTracetrue{product}
intxJavaPriority10_To_OSPriority-1{product}
intxJavaPriority1_To_OSPriority-1{product}
intxJavaPriority2_To_OSPriority-1{product}
intxJavaPriority3_To_OSPriority-1{product}
intxJavaPriority4_To_OSPriority-1{product}
intxJavaPriority5_To_OSPriority-1{product}
intxJavaPriority6_To_OSPriority-1{product}
intxJavaPriority7_To_OSPriority-1{product}
intxJavaPriority8_To_OSPriority-1{product}
intxJavaPriority9_To_OSPriority-1{product}
boolLIRFillDelaySlotsfalse{C1pd
uintxLargePageHeapSizeThreshold134217728{product}
uintxLargePageSizeInBytes0{product}
boolLazyBootClassLoadertrue{product}
intxLiveNodeCountInliningCutoff40000{C2product}
boolLoadExecStackDllInVMThreadtrue{product}
boolLogCommercialFeaturesfalse{product}
intxLoopMaxUnroll16{C2product}
intxLoopOptsCount43{C2product}
intxLoopUnrollLimit60{C2pd
intxLoopUnrollMin4{C2product}
boolLoopUnswitchingtrue{C2product}
boolManagementServerfalse{product}
uintxMarkStackSize4194304{product}
uintxMarkStackSizeMax536870912{product}
uintxMarkSweepAlwaysCompactCount4{product}
uintxMarkSweepDeadRatio5{product}
intxMaxBCEAEstimateLevel5{product}
intxMaxBCEAEstimateSize150{product}
uintxMaxDirectMemorySize0{product}
boolMaxFDLimittrue{product}
uintxMaxGCMinorPauseMillis18446744073709551615{product}
uintxMaxGCPauseMillis18446744073709551615{product}
uintxMaxHeapFreeRatio70{manageable}
uintxMaxHeapSize130862280{product}
intxMaxInlineLevel9{product}
intxMaxInlineSize35{product}
intxMaxJNILocalCapacity65536{product}
intxMaxJavaStackTraceDepth1024{product}
intxMaxJumpTableSize65000{C2product}
intxMaxJumpTableSparseness5{C2product}
intxMaxLabelRootDepth1100{C2product}
intxMaxLoopPad15{C2product}
uintxMaxMetaspaceExpansion5452592{product}
uintxMaxMetaspaceFreeRatio70{product}
uintxMaxMetaspaceSize18446744073709551615{product}
uintxMaxNewSize18446744073709551615{product}
intxMaxNodeLimit80000{C2product}
uint64_tMaxRAM137438953472{pdproduct}
uintxMaxRAMFraction4{product}
doubleMaxRAMPercentage25.000000{product}
intxMaxRecursiveInlineLevel1{product}
uintxMaxTenuringThreshold15{product}
intxMaxTrivialSize6{product}
intxMaxVectorSize32{C2product}
uintxMetaspaceSize21810376{pdproduct}
boolMethodFlushingtrue{product}
uintxMinHeapDeltaBytes170392{product}
uintxMinHeapFreeRatio40{manageable}
intxMinInliningThreshold250{product}
intxMinJumpTableSize10{C2pd
uintxMinMetaspaceExpansion340784{product}
uintxMinMetaspaceFreeRatio40{product}
uintxMinRAMFraction2{product}
doubleMinRAMPercentage50.000000{product}
uintxMinSurvivorRatio3{product}
uintxMinTLABSize2048{product}
intxMonitorBound0{product}
boolMonitorInUseListsfalse{product}
intxMultiArrayExpandLimit6{C2product}
boolMustCallLoadClassInternalfalse{product}
uintxNUMAChunkResizeWeight20{product}
uintxNUMAInterleaveGranularity2097152{product}
uintxNUMAPageScanRate256{product}
uintxNUMASpaceResizeRate1073741824{product}
boolNUMAStatsfalse{product}
ccstrNativeMemoryTrackingoff{product}
boolNeedsDeoptSuspendfalse{pdproduct}
boolNeverActAsServerClassMachinefalse{pdproduct}
boolNeverTenurefalse{product}
uintxNewRatio2{product}
uintxNewSize1363144{product}
uintxNewSizeThreadIncrease5320{pdproduct}
intxNmethodSweepActivity10{product}
intxNmethodSweepCheckInterval5{product}
intxNmethodSweepFraction16{product}
intxNodeLimitFudgeFactor2000{C2product}
uintxNumberOfGCLogFiles0{product}
intxNumberOfLoopInstrToAlign4{C2product}
intxObjectAlignmentInBytes8{lp64_product}
uintxOldPLABSize1024{product}
uintxOldPLABWeight50{product}
uintxOldSize5452592{product}
boolOmitStackTraceInFastThrowtrue{product}
ccstrlistOnError{product}
ccstrlistOnOutOfMemoryError{product}
intxOnStackReplacePercentage140{pdproduct}
boolOptimizeFilltrue{C2product}
boolOptimizePtrComparetrue{C2product}
boolOptimizeStringConcattrue{C2product}
boolOptoBundlingfalse{C2pd
intxOptoLoopAlignment16{pdproduct}
boolOptoSchedulingfalse{C2pd
uintxPLABWeight75{product}
boolPSChunkLargeArraystrue{product}
intxParGCArrayScanChunk50{product}
uintxParGCDesiredObjsFromOverflowList20{product}
boolParGCTrimOverflowtrue{product}
boolParGCUseLocalOverflowfalse{product}
uintxParallelGCBufferWastePct10{product}
uintxParallelGCThreads0{product}
boolParallelGCVerbosefalse{product}
uintxParallelOldDeadWoodLimiterMean50{product}
uintxParallelOldDeadWoodLimiterStdDev80{product}
boolParallelRefProcBalancingEnabledtrue{product}
boolParallelRefProcEnabledfalse{product}
boolPartialPeelAtUnsignedTeststrue{C2product}
boolPartialPeelLooptrue{C2product}
intxPartialPeelNewPhiDelta0{C2product}
uintxPausePadding1{product}
intxPerBytecodeRecompilationCutoff200{product}
intxPerBytecodeTrapLimit4{product}
intxPerMethodRecompilationCutoff400{product}
intxPerMethodTrapLimit100{product}
boolPerfAllowAtExitRegistrationfalse{product}
boolPerfBypassFileSystemCheckfalse{product}
intxPerfDataMemorySize32768{product}
intxPerfDataSamplingInterval50{product}
ccstrPerfDataSaveFile{product}
boolPerfDataSaveToFilefalse{product}
boolPerfDisableSharedMemfalse{product}
intxPerfMaxStringConstLength1024{product}
intxPreInflateSpin10{pdproduct}
boolPreferContainerQuotaForCPUCounttrue{product}
boolPreferInterpreterNativeStubsfalse{pdproduct}
intxPrefetchCopyIntervalInBytes-1{product}
intxPrefetchFieldsAhead-1{product}
intxPrefetchScanIntervalInBytes-1{product}
boolPreserveAllAnnotationsfalse{product}
boolPreserveFramePointerfalse{pdproduct}
uintxPretenureSizeThreshold0{product}
boolPrintAdaptiveSizePolicyfalse{product}
boolPrintCMSInitiationStatisticsfalse{product}
intxPrintCMSStatistics0{product}
boolPrintClassHistogramfalse{manageable}
boolPrintClassHistogramAfterFullGCfalse{manageable}
boolPrintClassHistogramBeforeFullGCfalse{manageable}
boolPrintCodeCachefalse{product}
boolPrintCodeCacheOnCompilationfalse{product}
boolPrintCommandLineFlagsfalse{product}
boolPrintCompilationfalse{product}
boolPrintConcurrentLocksfalse{manageable}
intxPrintFLSCensus0{product}
intxPrintFLSStatistics0{product}
boolPrintFlagsFinalfalse{product}
boolPrintFlagsInitialfalse{product}
boolPrintGCfalse{manageable}
boolPrintGCApplicationConcurrentTimefalse{product}
boolPrintGCApplicationStoppedTimefalse{product}
boolPrintGCCausetrue{product}
boolPrintGCDateStampsfalse{manageable}
boolPrintGCDetailsfalse{manageable}
boolPrintGCIDfalse{manageable}
boolPrintGCTaskTimeStampsfalse{product}
boolPrintGCTimeStampsfalse{manageable}
boolPrintHeapAtGCfalse{productrw}
boolPrintHeapAtGCExtendedfalse{productrw}
boolPrintHeapAtSIGBREAKtrue{product}
boolPrintJNIGCStallsfalse{product}
boolPrintJNIResolvingfalse{product}
boolPrintOldPLABfalse{product}
boolPrintOopAddressfalse{product}
boolPrintPLABfalse{product}
boolPrintParallelOldGCPhaseTimesfalse{product}
boolPrintPromotionFailurefalse{product}
boolPrintReferenceGCfalse{product}
boolPrintSafepointStatisticsfalse{product}
intxPrintSafepointStatisticsCount300{product}
intxPrintSafepointStatisticsTimeout-1{product}
boolPrintSharedArchiveAndExitfalse{product}
boolPrintSharedDictionaryfalse{product}
boolPrintSharedSpacesfalse{product}
boolPrintStringDeduplicationStatisticsfalse{product}
boolPrintStringTableStatisticsfalse{product}
boolPrintTLABfalse{product}
boolPrintTenuringDistributionfalse{product}
boolPrintTieredEventsfalse{product}
boolPrintVMOptionsfalse{product}
boolPrintVMQWaitTimefalse{product}
boolPrintWarningstrue{product}
uintxProcessDistributionStride4{product}
boolProfileInterpretertrue{pdproduct}
boolProfileIntervalsfalse{product}
intxProfileIntervalsTicks100{product}
intxProfileMaturityPercentage20{product}
boolProfileVMfalse{product}
boolProfilerPrintByteCodeStatisticsfalse{product}
boolProfilerRecordPCfalse{product}
uintxPromotedPadding3{product}
uintxQueuedAllocationWarningCount0{product}
uintxRTMRetryCount5{ARCHproduct}
boolRangeCheckEliminationtrue{product}
intxReadPrefetchInstr0{ARCHproduct}
boolReassociateInvariantstrue{C2product}
boolReduceBulkZeroingtrue{C2product}
boolReduceFieldZeroingtrue{C2product}
boolReduceInitialCardMarkstrue{C2product}
boolReduceSignalUsagefalse{product}
intxRefDiscoveryPolicy0{product}
boolReflectionWrapResolutionErrorstrue{product}
boolRegisterFinalizersAtInittrue{product}
boolRelaxAccessControlCheckfalse{product}
ccstrReplayDataFile{product}
boolRequireSharedSpacesfalse{product}
uintxReservedCodeCacheSize50331648{pdproduct}
boolResizeOldPLABtrue{product}
boolResizePLABtrue{product}
boolResizeTLABtrue{pdproduct}
boolRestoreMXCSROnJNICallsfalse{product}
boolRestrictContendedtrue{product}
boolRewriteBytecodestrue{pdproduct}
boolRewriteFrequentPairstrue{pdproduct}
intxSafepointPollOffset256{C1pd
intxSafepointSpinBeforeYield2000{product}
boolSafepointTimeoutfalse{product}
intxSafepointTimeoutDelay10000{product}
boolScavengeBeforeFullGCtrue{product}
intxSelfDestructTimer0{product}
uintxSharedBaseAddress34359738368{product}
ccstrSharedClassListFile{product}
uintxSharedMiscCodeSize122880{product}
uintxSharedMiscDataSize4194304{product}
uintxSharedReadOnlySize16777216{product}
uintxSharedReadWriteSize16777216{product}
boolShowMessageBoxOnErrorfalse{product}
intxSoftRefLRUPolicyMSPerMB1000{product}
boolSpecialEncodeISOArraytrue{C2product}
boolSplitIfBlockstrue{C2product}
intxStackRedPages1{pdproduct}
intxStackShadowPages20{pdproduct}
boolStackTraceInThrowabletrue{product}
intxStackYellowPages2{pdproduct}
boolStartAttachListenerfalse{product}
intxStarvationMonitorInterval200{product}
boolStressLdcRewritefalse{product}
uintxStringDeduplicationAgeThreshold3{product}
uintxStringTableSize60013{product}
boolSuppressFatalErrorMessagefalse{product}
uintxSurvivorPadding3{product}
uintxSurvivorRatio8{product}
intxSuspendRetryCount50{product}
intxSuspendRetryDelay5{product}
intxSyncFlags0{product}
ccstrSyncKnobs{product}
intxSyncVerbose0{product}
uintxTLABAllocationWeight35{product}
uintxTLABRefillWasteFraction64{product}
uintxTLABSize0{product}
boolTLABStatstrue{product}
uintxTLABWasteIncrement4{product}
uintxTLABWasteTargetPercent1{product}
uintxTargetPLABWastePct10{product}
uintxTargetSurvivorRatio50{product}
uintxTenuredGenerationSizeIncrement20{product}
uintxTenuredGenerationSizeSupplement80{product}
uintxTenuredGenerationSizeSupplementDecay2{product}
intxThreadPriorityPolicy0{product}
boolThreadPriorityVerbosefalse{product}
uintxThreadSafetyMargin52428800{product}
intxThreadStackSize1024{pdproduct}
uintxThresholdTolerance10{product}
intxTier0BackedgeNotifyFreqLog10{product}
intxTier0InvokeNotifyFreqLog7{product}
intxTier0ProfilingStartPercentage200{product}
intxTier23InlineeNotifyFreqLog20{product}
intxTier2BackEdgeThreshold0{product}
intxTier2BackedgeNotifyFreqLog14{product}
intxTier2CompileThreshold0{product}
intxTier2InvokeNotifyFreqLog11{product}
intxTier3BackEdgeThreshold60000{product}
intxTier3BackedgeNotifyFreqLog13{product}
intxTier3CompileThreshold2000{product}
intxTier3DelayOff2{product}
intxTier3DelayOn5{product}
intxTier3InvocationThreshold200{product}
intxTier3InvokeNotifyFreqLog10{product}
intxTier3LoadFeedback5{product}
intxTier3MinInvocationThreshold100{product}
intxTier4BackEdgeThreshold40000{product}
intxTier4CompileThreshold15000{product}
intxTier4InvocationThreshold5000{product}
intxTier4LoadFeedback3{product}
intxTier4MinInvocationThreshold600{product}
boolTieredCompilationtrue{pdproduct}
intxTieredCompileTaskTimeout50{product}
intxTieredRateUpdateMaxTime25{product}
intxTieredRateUpdateMinTime1{product}
intxTieredStopAtLevel4{product}
boolTimeLinearScanfalse{C1product}
boolTraceBiasedLockingfalse{product}
boolTraceClassLoadingfalse{productrw}
boolTraceClassLoadingPreorderfalse{product}
boolTraceClassPathsfalse{product}
boolTraceClassResolutionfalse{product}
boolTraceClassUnloadingfalse{productrw}
boolTraceDynamicGCThreadsfalse{product}
boolTraceGen0Timefalse{product}
boolTraceGen1Timefalse{product}
ccstrTraceJVMTI{product}
boolTraceLoaderConstraintsfalse{productrw}
boolTraceMetadataHumongousAllocationfalse{product}
boolTraceMonitorInflationfalse{product}
boolTraceParallelOldGCTasksfalse{product}
intxTraceRedefineClasses0{product}
boolTraceSafepointCleanupTimefalse{product}
boolTraceSharedLookupCachefalse{product}
boolTraceSuspendWaitFailuresfalse{product}
intxTrackedInitializationLimit50{C2product}
boolTransmitErrorReportfalse{product}
boolTrapBasedNullChecksfalse{pdproduct}
boolTrapBasedRangeChecksfalse{C2pd
intxTypeProfileArgsLimit2{product}
uintxTypeProfileLevel111{pdproduct}
intxTypeProfileMajorReceiverPercent90{C2product}
intxTypeProfileParmsLimit2{product}
intxTypeProfileWidth2{product}
intxUnguardOnExecutionViolation0{product}
boolUnlinkSymbolsALotfalse{product}
boolUse486InstrsOnlyfalse{ARCHproduct}
boolUseAESfalse{product}
boolUseAESIntrinsicsfalse{product}
intxUseAVX99{ARCHproduct}
boolUseAdaptiveGCBoundaryfalse{product}
boolUseAdaptiveGenerationSizePolicyAtMajorCollectiontrue{product}
boolUseAdaptiveGenerationSizePolicyAtMinorCollectiontrue{product}
boolUseAdaptiveNUMAChunkSizingtrue{product}
boolUseAdaptiveSizeDecayMajorGCCosttrue{product}
boolUseAdaptiveSizePolicytrue{product}
boolUseAdaptiveSizePolicyFootprintGoaltrue{product}
boolUseAdaptiveSizePolicyWithSystemGCfalse{product}
boolUseAddressNopfalse{ARCHproduct}
boolUseAltSigsfalse{product}
boolUseAutoGCSelectPolicyfalse{product}
boolUseBMI1Instructionsfalse{ARCHproduct}
boolUseBMI2Instructionsfalse{ARCHproduct}
boolUseBiasedLockingtrue{product}
boolUseBimorphicInliningtrue{C2product}
boolUseBoundThreadstrue{product}
boolUseCLMULfalse{ARCHproduct}
boolUseCMSBestFittrue{product}
boolUseCMSCollectionPassingtrue{product}
boolUseCMSCompactAtFullCollectiontrue{product}
boolUseCMSInitiatingOccupancyOnlyfalse{product}
boolUseCRC32Intrinsicsfalse{product}
boolUseCodeCacheFlushingtrue{product}
boolUseCompilertrue{product}
boolUseCompilerSafepointstrue{product}
boolUseCompressedClassPointersfalse{lp64_product}
boolUseCompressedOopsfalse{lp64_product}
boolUseConcMarkSweepGCfalse{product}
boolUseCondCardMarkfalse{C2product}
boolUseContainerSupporttrue{product}
boolUseCountLeadingZerosInstructionfalse{ARCHproduct}
boolUseCountTrailingZerosInstructionfalse{ARCHproduct}
boolUseCountedLoopSafepointsfalse{C2product}
boolUseCounterDecaytrue{product}
boolUseDivModtrue{C2product}
boolUseDynamicNumberOfGCThreadsfalse{product}
boolUseFPUForSpillingfalse{C2product}
boolUseFastAccessorMethodstrue{product}
boolUseFastEmptyMethodstrue{product}
boolUseFastJNIAccessorstrue{product}
boolUseFastStosbfalse{ARCHproduct}
boolUseG1GCfalse{product}
boolUseGCLogFileRotationfalse{product}
boolUseGCOverheadLimittrue{product}
boolUseGCTaskAffinityfalse{product}
boolUseGHASHIntrinsicsfalse{product}
boolUseHeavyMonitorsfalse{product}
boolUseHugeTLBFSfalse{product}
boolUseInlineCachestrue{product}
boolUseInterpretertrue{product}
boolUseJumpTablestrue{C2product}
boolUseLWPSynchronizationtrue{product}
boolUseLargePagesfalse{pdproduct}
boolUseLargePagesInMetaspacefalse{product}
boolUseLargePagesIndividualAllocationfalse{pdproduct}
boolUseLinuxPosixThreadCPUClockstrue{product}
boolUseLockedTracingfalse{product}
boolUseLoopCountertrue{product}
boolUseLoopInvariantCodeMotiontrue{C1product}
boolUseLoopPredicatetrue{C2product}
boolUseMathExactIntrinsicstrue{C2product}
boolUseMaximumCompactionOnSystemGCtrue{product}
boolUseMembarfalse{pdproduct}
boolUseMontgomeryMultiplyIntrinsicfalse{C2product}
boolUseMontgomerySquareIntrinsicfalse{C2product}
boolUseMulAddIntrinsicfalse{C2product}
boolUseMultiplyToLenIntrinsicfalse{C2product}
boolUseNUMAfalse{product}
boolUseNUMAInterleavingfalse{product}
boolUseNewLongLShiftfalse{ARCHproduct}
boolUseOSErrorReportingfalse{pdproduct}
boolUseOldInliningtrue{C2product}
boolUseOnStackReplacementtrue{pdproduct}
boolUseOnlyInlinedBimorphictrue{C2product}
boolUseOprofilefalse{product}
boolUseOptoBiasInliningtrue{C2product}
boolUsePSAdaptiveSurvivorSizePolicytrue{product}
boolUseParNewGCfalse{product}
boolUseParallelGCfalse{product}
boolUseParallelOldGCfalse{product}
boolUsePerfDatatrue{product}
boolUsePopCountInstructionfalse{product}
boolUseRDPCForConstantTableBasefalse{C2product}
boolUseRTMDeoptfalse{ARCHproduct}
boolUseRTMLockingfalse{ARCHproduct}
boolUseSHAfalse{product}
boolUseSHA1Intrinsicsfalse{product}
boolUseSHA256Intrinsicsfalse{product}
boolUseSHA512Intrinsicsfalse{product}
boolUseSHMfalse{product}
intxUseSSE99{product}
boolUseSSE42Intrinsicsfalse{product}
boolUseSerialGCfalse{product}
boolUseSharedSpacestrue{product}
boolUseSignalChainingtrue{product}
boolUseSquareToLenIntrinsicfalse{C2product}
boolUseStoreImmI16true{ARCHproduct}
boolUseStringDeduplicationfalse{product}
boolUseSuperWordtrue{C2product}
boolUseTLABtrue{pdproduct}
boolUseThreadPrioritiestrue{pdproduct}
boolUseTransparentHugePagesfalse{product}
boolUseTypeProfiletrue{product}
boolUseTypeSpeculationtrue{C2product}
boolUseUnalignedLoadStoresfalse{ARCHproduct}
boolUseVMInterruptibleIOfalse{product}
boolUseXMMForArrayCopyfalse{product}
boolUseXmmI2Dfalse{ARCHproduct}
boolUseXmmI2Ffalse{ARCHproduct}
boolUseXmmLoadAndClearUppertrue{ARCHproduct}
boolUseXmmRegToRegMoveAllfalse{ARCHproduct}
boolVMThreadHintNoPreemptfalse{product}
intxVMThreadPriority-1{product}
intxVMThreadStackSize1024{pdproduct}
intxValueMapInitialSize11{C1product}
intxValueMapMaxLoopSize8{C1product}
intxValueSearchLimit1000{C2product}
boolVerifyMergedCPBytecodestrue{product}
boolVerifySharedSpacesfalse{product}
intxWorkAroundNPTLTimedWaitHang1{product}
uintxYoungGenerationSizeIncrement20{product}
uintxYoungGenerationSizeSupplement80{product}
uintxYoungGenerationSizeSupplementDecay8{product}
uintxYoungPLABSize4096{product}
boolZeroTLABfalse{product}
intxhashCode5{product}

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