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JVM参数及其默认值[1/2]

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>>>Hotspot参数打印:
==>-XX:+PrintFlagsFinal ==>该参数开启时,打印所有的jvm的最终参数,如果没有修改就是默认值。其中,【:=】的值是本次jvm启动时,修改过的值。
==>-XX:+PrintFlagsInitial ==>该参数开启时,打印所有的jvm的原有的初始化参数,即使该值改变,其打印的也是只是初始值。

具体命令示例:【java -XX:+PrintFlagsFinal -version】

[Global flags]
    uintx AdaptivePermSizeWeight                    = 20              {product}         
    uintx AdaptiveSizeDecrementScaleFactor          = 4               {product}         
    uintx AdaptiveSizeMajorGCDecayTimeScale         = 10              {product}         
    uintx AdaptiveSizePausePolicy                   = 0               {product}         
    uintx AdaptiveSizePolicyCollectionCostMargin    = 50              {product}         
    uintx AdaptiveSizePolicyInitializingSteps       = 20              {product}         
    uintx AdaptiveSizePolicyOutputInterval          = 0               {product}         
    uintx AdaptiveSizePolicyWeight                  = 10              {product}         
    uintx AdaptiveSizeThroughPutPolicy              = 0               {product}         
    uintx AdaptiveTimeWeight                        = 25              {product}         
     bool AdjustConcurrency                         = false           {product}         
     bool AggressiveOpts                            = false           {product}         
     intx AliasLevel                                = 3               {product}         
     intx AllocatePrefetchDistance                  = -1              {product}         
     intx AllocatePrefetchInstr                     = 0               {product}         
     intx AllocatePrefetchLines                     = 1               {product}         
     intx AllocatePrefetchStepSize                  = 16              {product}         
     intx AllocatePrefetchStyle                     = 1               {product}         
     bool AllowJNIEnvProxy                          = false           {product}         
     bool AllowParallelDefineClass                  = false           {product}         
     bool AllowUserSignalHandlers                   = false           {product}         
     bool AlwaysActAsServerClassMachine             = false           {product}         
     bool AlwaysCompileLoopMethods                  = false           {product}         
     intx AlwaysInflate                             = 0               {product}         
     bool AlwaysLockClassLoader                     = false           {product}         
     bool AlwaysPreTouch                            = false           {product}         
     bool AlwaysRestoreFPU                          = false           {product}         
     bool AlwaysTenure                              = false           {product}         
     bool AnonymousClasses                          = false           {product}         
     bool AssertOnSuspendWaitFailure                = false           {product}         
     intx Atomics                                   = 0               {product}         
     intx AutoBoxCacheMax                           = 128             {C2 product}      
    uintx AutoGCSelectPauseMillis                   = 5000            {product}         
     intx BCEATraceLevel                            = 0               {product}         
     intx BackEdgeThreshold                         = 100000          {pd product}      
     bool BackgroundCompilation                     = true            {pd product}      
    uintx BaseFootPrintEstimate                     = 268435456       {product}         
     intx BiasedLockingBulkRebiasThreshold          = 20              {product}         
     intx BiasedLockingBulkRevokeThreshold          = 40              {product}         
     intx BiasedLockingDecayTime                    = 25000           {product}         
     intx BiasedLockingStartupDelay                 = 4000            {product}         
     bool BindGCTaskThreadsToCPUs                   = false           {product}         
     bool BlockLayoutByFrequency                    = true            {C2 product}      
     intx BlockLayoutMinDiamondPercentage           = 20              {C2 product}      
     bool BlockLayoutRotateLoops                    = true            {C2 product}      
     bool BlockOffsetArrayUseUnallocatedBlock       = false           {product}         
     bool BranchOnRegister                          = false           {C2 product}      
     bool BytecodeVerificationLocal                 = false           {product}         
     bool BytecodeVerificationRemote                = true            {product}         
     bool C1OptimizeVirtualCallProfiling            = true            {C1 product}      
     bool C1ProfileBranches                         = true            {C1 product}      
     bool C1ProfileCalls                            = true            {C1 product}      
     bool C1ProfileCheckcasts                       = true            {C1 product}      
     bool C1ProfileInlinedCalls                     = true            {C1 product}      
     bool C1ProfileVirtualCalls                     = true            {C1 product}      
     bool C1UpdateMethodData                        = true            {C1 product}      
     intx CICompilerCount                           = 2               {product}         
     bool CICompilerCountPerCPU                     = false           {product}         
     bool CITime                                    = false           {product}         
     bool CMSAbortSemantics                         = false           {product}         
    uintx CMSAbortablePrecleanMinWorkPerIteration   = 100             {product}         
     intx CMSAbortablePrecleanWaitMillis            = 100             {manageable}      
    uintx CMSBitMapYieldQuantum                     = 10485760        {product}         
    uintx CMSBootstrapOccupancy                     = 50              {product}         
     bool CMSClassUnloadingEnabled                  = false           {product}         
    uintx CMSClassUnloadingMaxInterval              = 0               {product}         
     bool CMSCleanOnEnter                           = true            {product}         
     bool CMSCompactWhenClearAllSoftRefs            = true            {product}         
    uintx CMSConcMarkMultiple                       = 32              {product}         
     bool CMSConcurrentMTEnabled                    = true            {product}         
    uintx CMSCoordinatorYieldSleepCount             = 10              {product}         
     bool CMSDumpAtPromotionFailure                 = false           {product}         
    uintx CMSExpAvgFactor                           = 50              {product}         
     bool CMSExtrapolateSweep                       = false           {product}         
    uintx CMSFullGCsBeforeCompaction                = 0               {product}         
    uintx CMSIncrementalDutyCycle                   = 10              {product}         
    uintx CMSIncrementalDutyCycleMin                = 0               {product}         
     bool CMSIncrementalMode                        = false           {product}         
    uintx CMSIncrementalOffset                      = 0               {product}         
     bool CMSIncrementalPacing                      = true            {product}         
    uintx CMSIncrementalSafetyFactor                = 10              {product}         
    uintx CMSIndexedFreeListReplenish               = 4               {product}         
     intx CMSInitiatingOccupancyFraction            = -1              {product}         
     intx CMSInitiatingPermOccupancyFraction        = -1              {product}         
     intx CMSIsTooFullPercentage                    = 98              {product}         
   double CMSLargeCoalSurplusPercent                = 0.950000        {product}         
   double CMSLargeSplitSurplusPercent               = 1.000000        {product}         
     bool CMSLoopWarn                               = false           {product}         
    uintx CMSMaxAbortablePrecleanLoops              = 0               {product}         
     intx CMSMaxAbortablePrecleanTime               = 5000            {product}         
    uintx CMSOldPLABMax                             = 1024            {product}         
    uintx CMSOldPLABMin                             = 16              {product}         
    uintx CMSOldPLABNumRefills                      = 4               {product}         
    uintx CMSOldPLABReactivityCeiling               = 10              {product}         
    uintx CMSOldPLABReactivityFactor                = 2               {product}         
     bool CMSOldPLABResizeQuicker                   = false           {product}         
    uintx CMSOldPLABToleranceFactor                 = 4               {product}         
     bool CMSPLABRecordAlways                       = true            {product}         
    uintx CMSParPromoteBlocksToClaim                = 16              {product}         
     bool CMSParallelRemarkEnabled                  = true            {product}         
     bool CMSParallelSurvivorRemarkEnabled          = true            {product}         
     bool CMSPermGenPrecleaningEnabled              = true            {product}         
    uintx CMSPrecleanDenominator                    = 3               {product}         
    uintx CMSPrecleanIter                           = 3               {product}         
    uintx CMSPrecleanNumerator                      = 2               {product}         
     bool CMSPrecleanRefLists1                      = true            {product}         
     bool CMSPrecleanRefLists2                      = false           {product}         
     bool CMSPrecleanSurvivors1                     = false           {product}         
     bool CMSPrecleanSurvivors2                     = true            {product}         
    uintx CMSPrecleanThreshold                      = 1000            {product}         
     bool CMSPrecleaningEnabled                     = true            {product}         
     bool CMSPrintChunksInDump                      = false           {product}         
     bool CMSPrintObjectsInDump                     = false           {product}         
    uintx CMSRemarkVerifyVariant                    = 1               {product}         
     bool CMSReplenishIntermediate                  = true            {product}         
    uintx CMSRescanMultiple                         = 32              {product}         
    uintx CMSRevisitStackSize                       = 1048576         {product}         
    uintx CMSSamplingGrain                          = 16384           {product}         
     bool CMSScavengeBeforeRemark                   = false           {product}         
    uintx CMSScheduleRemarkEdenPenetration          = 50              {product}         
    uintx CMSScheduleRemarkEdenSizeThreshold        = 2097152         {product}         
    uintx CMSScheduleRemarkSamplingRatio            = 5               {product}         
   double CMSSmallCoalSurplusPercent                = 1.050000        {product}         
   double CMSSmallSplitSurplusPercent               = 1.100000        {product}         
     bool CMSSplitIndexedFreeListBlocks             = true            {product}         
     intx CMSTriggerPermRatio                       = 80              {product}         
     intx CMSTriggerRatio                           = 80              {product}         
     bool CMSUseOldDefaults                         = false           {product}         
     intx CMSWaitDuration                           = 2000            {manageable}      
    uintx CMSWorkQueueDrainThreshold                = 10              {product}         
     bool CMSYield                                  = true            {product}         
    uintx CMSYieldSleepCount                        = 0               {product}         
     intx CMSYoungGenPerWorker                      = 16777216        {product}         
    uintx CMS_FLSPadding                            = 1               {product}         
    uintx CMS_FLSWeight                             = 75              {product}         
    uintx CMS_SweepPadding                          = 1               {product}         
    uintx CMS_SweepTimerThresholdMillis             = 10              {product}         
    uintx CMS_SweepWeight                           = 75              {product}         
     bool CheckJNICalls                             = false           {product}         
     bool ClassUnloading                            = true            {product}         
     intx ClearFPUAtPark                            = 0               {product}         
     bool ClipInlining                              = true            {product}         
    uintx CodeCacheExpansionSize                    = 65536           {pd product}      
    uintx CodeCacheFlushingMinimumFreeSpace         = 1536000         {product}         
    uintx CodeCacheMinimumFreeSpace                 = 512000          {product}         
     bool CollectGen0First                          = false           {product}         
     bool CompactFields                             = true            {product}         
     intx CompilationPolicyChoice                   = 0               {product}         
     intx CompilationRepeat                         = 0               {C1 product}      
ccstrlist CompileCommand                            =                 {product}         
    ccstr CompileCommandFile                        =                 {product}         
ccstrlist CompileOnly                               =                 {product}         
     intx CompileThreshold                          = 10000           {pd product}      
     bool CompilerThreadHintNoPreempt               = true            {product}         
     intx CompilerThreadPriority                    = -1              {product}         
     intx CompilerThreadStackSize                   = 0               {pd product}      
    uintx ConcGCThreads                             = 0               {product}         
     intx ConditionalMoveLimit                      = 3               {C2 pd product}   
     bool ConvertSleepToYield                       = true            {pd product}      
     bool ConvertYieldToSleep                       = false           {product}         
     bool DTraceAllocProbes                         = false           {product}         
     bool DTraceMethodProbes                        = false           {product}         
     bool DTraceMonitorProbes                       = false           {product}         
    uintx DefaultMaxRAMFraction                     = 4               {product}         
     intx DefaultThreadPriority                     = -1              {product}         
     intx DeferPollingPageLoopCount                 = -1              {product}         
     intx DeferThrSuspendLoopCount                  = 4000            {product}         
     bool DeoptimizeRandom                          = false           {product}         
     intx DesiredMethodLimit                        = 8000            {product}         
     bool DisableAttachMechanism                    = false           {product}         
     bool DisableExplicitGC                         = false           {product}         
     bool DisplayVMOutputToStderr                   = false           {product}         
     bool DisplayVMOutputToStdout                   = false           {product}         
     bool DoEscapeAnalysis                          = true            {C2 product}      
     intx DominatorSearchLimit                      = 1000            {C2 diagnostic}   
     bool DontCompileHugeMethods                    = true            {product}         
     bool DontYieldALot                             = false           {pd product}      
     bool DumpSharedSpaces                          = false           {product}         
     bool EagerXrunInit                             = false           {product}         
     intx EliminateAllocationArraySizeLimit         = 64              {C2 product}      
     bool EliminateAllocations                      = true            {C2 product}      
     bool EliminateAutoBox                          = false           {C2 diagnostic}   
     bool EliminateLocks                            = true            {C2 product}      
     intx EmitSync                                  = 0               {product}         
    uintx ErgoHeapSizeLimit                         = 0               {product}         
    ccstr ErrorFile                                 =                 {product}         
     bool EstimateArgEscape                         = true            {product}         
     intx EventLogLength                            = 2000            {product}         
     bool ExplicitGCInvokesConcurrent               = false           {product}         
     bool ExplicitGCInvokesConcurrentAndUnloadsClasses  = false           {product}         
     bool ExtendedDTraceProbes                      = false           {product}         
     bool FLSAlwaysCoalesceLarge                    = false           {product}         
    uintx FLSCoalescePolicy                         = 2               {product}         
   double FLSLargestBlockCoalesceProximity          = 0.990000        {product}         
     bool FailOverToOldVerifier                     = true            {product}         
     bool FastTLABRefill                            = true            {product}         
     intx FenceInstruction                          = 0               {product}         
     intx FieldsAllocationStyle                     = 1               {product}         
     bool FilterSpuriousWakeups                     = true            {product}         
     bool ForceNUMA                                 = false           {product}         
     bool ForceTimeHighResolution                   = false           {product}         
     intx FreqInlineSize                            = 325             {pd product}      
     intx G1ConcRefinementGreenZone                 = 0               {product}         
     intx G1ConcRefinementRedZone                   = 0               {product}         
     intx G1ConcRefinementServiceIntervalMillis     = 300             {product}         
    uintx G1ConcRefinementThreads                   = 0               {product}         
     intx G1ConcRefinementThresholdStep             = 0               {product}         
     intx G1ConcRefinementYellowZone                = 0               {product}         
     intx G1ConfidencePercent                       = 50              {product}         
    uintx G1HeapRegionSize                          = 0               {product}         
     intx G1MarkRegionStackSize                     = 1048576         {product}         
     intx G1RSetRegionEntries                       = 0               {product}         
    uintx G1RSetScanBlockSize                       = 64              {product}         
     intx G1RSetSparseRegionEntries                 = 0               {product}         
     intx G1RSetUpdatingPauseTimePercent            = 10              {product}         
     intx G1ReservePercent                          = 10              {product}         
    uintx G1SATBBufferEnqueueingThresholdPercent    = 60              {product}         
     intx G1SATBBufferSize                          = 1024            {product}         
     intx G1UpdateBufferSize                        = 256             {product}         
     bool G1UseAdaptiveConcRefinement               = true            {product}         
    uintx GCDrainStackTargetSize                    = 64              {product}         
    uintx GCHeapFreeLimit                           = 2               {product}         
    uintx GCLockerEdenExpansionPercent              = 5               {product}         
     bool GCLockerInvokesConcurrent                 = false           {product}         
     bool GCOverheadReporting                       = false           {product}         
     intx GCOverheadReportingPeriodMS               = 100             {product}         
    uintx GCPauseIntervalMillis                     = 0               {product}         
    uintx GCTaskTimeStampEntries                    = 200             {product}         
    uintx GCTimeLimit                               = 98              {product}         
    uintx GCTimeRatio                               = 99              {product}         
    ccstr HPILibPath                                =                 {product}         
    uintx HeapBaseMinAddress                        = 2147483648      {pd product}      
     bool HeapDumpAfterFullGC                       = false           {manageable}      
     bool HeapDumpBeforeFullGC                      = false           {manageable}      
     bool HeapDumpOnOutOfMemoryError                = false           {manageable}      
    ccstr HeapDumpPath                              =                 {manageable}      
    uintx HeapFirstMaximumCompactionCount           = 3               {product}         
    uintx HeapMaximumCompactionInterval             = 20              {product}         
     bool IgnoreUnrecognizedVMOptions               = false           {product}         
    uintx InitialCodeCacheSize                      = 2555904         {pd product}      
    uintx InitialHeapSize                           = 0               {product}         
    uintx InitialRAMFraction                        = 64              {product}         
    uintx InitialSurvivorRatio                      = 8               {product}         
     intx InitialTenuringThreshold                  = 7               {product}         
    uintx InitiatingHeapOccupancyPercent            = 45              {product}         
     bool Inline                                    = true            {product}         
     intx InlineSmallCode                           = 1000            {pd product}      
     bool InsertMemBarAfterArraycopy                = true            {C2 product}      
     intx InteriorEntryAlignment                    = 16              {C2 pd product}   
     intx InterpreterProfilePercentage              = 33              {product}         
     bool JNIDetachReleasesMonitors                 = true            {product}         
     bool JavaMonitorsInStackTrace                  = true            {product}         
     intx JavaPriority10_To_OSPriority              = -1              {product}         
     intx JavaPriority1_To_OSPriority               = -1              {product}         
     intx JavaPriority2_To_OSPriority               = -1              {product}         
     intx JavaPriority3_To_OSPriority               = -1              {product}         
     intx JavaPriority4_To_OSPriority               = -1              {product}         
     intx JavaPriority5_To_OSPriority               = -1              {product}         
     intx JavaPriority6_To_OSPriority               = -1              {product}         
     intx JavaPriority7_To_OSPriority               = -1              {product}         
     intx JavaPriority8_To_OSPriority               = -1              {product}         
     intx JavaPriority9_To_OSPriority               = -1              {product}         
     bool LIRFillDelaySlots                         = false           {C1 pd product}   
    uintx LargePageHeapSizeThreshold                = 134217728       {product}         
    uintx LargePageSizeInBytes                      = 0               {product}         
     bool LazyBootClassLoader                       = true            {product}         
     intx LoopOptsCount                             = 43              {C2 product}      
     intx LoopUnrollLimit                           = 60              {C2 pd product}   
     intx LoopUnrollMin                             = 4               {C2 product}      
     bool LoopUnswitching                           = true            {C2 product}      
     bool ManagementServer                          = false           {product}         
    uintx MarkStackSize                             = 4194304         {product}         
    uintx MarkStackSizeMax                          = 536870912       {product}         
     intx MarkSweepAlwaysCompactCount               = 4               {product}         
    uintx MarkSweepDeadRatio                        = 5               {product}         
     intx MaxBCEAEstimateLevel                      = 5               {product}         
     intx MaxBCEAEstimateSize                       = 150             {product}         
     intx MaxDirectMemorySize                       = -1              {product}         
     bool MaxFDLimit                                = true            {product}         
    uintx MaxGCMinorPauseMillis                     = 4294967295      {product}         
    uintx MaxGCPauseMillis                          = 4294967295      {product}         
    uintx MaxHeapFreeRatio                          = 70              {product}         
    uintx MaxHeapSize                               = 130862280       {product}         
     intx MaxInlineLevel                            = 9               {product}         
     intx MaxInlineSize                             = 35              {product}         
     intx MaxJavaStackTraceDepth                    = 1024            {product}         
     intx MaxJumpTableSize                          = 65000           {C2 product}      
     intx MaxJumpTableSparseness                    = 5               {C2 product}      
     intx MaxLabelRootDepth                         = 1100            {C2 product}      
     intx MaxLoopPad                                = 15              {C2 product}      
    uintx MaxNewSize                                = 4294967295      {product}         
     intx MaxNodeLimit                              = 65000           {C2 product}      
    uintx MaxPermHeapExpansion                      = 5452592         {product}         
    uintx MaxPermSize                               = 87241520        {pd product}      
uint64_t MaxRAM                                    = 0               {pd product}      
    uintx MaxRAMFraction                            = 4               {product}         
     intx MaxRecursiveInlineLevel                   = 1               {product}         
     intx MaxTenuringThreshold                      = 15              {product}         
     intx MaxTrivialSize                            = 6               {product}         
     bool MethodFlushing                            = true            {product}         
     intx MinCodeCacheFlushingInterval              = 30              {product}         
    uintx MinHeapDeltaBytes                         = 170392          {product}         
    uintx MinHeapFreeRatio                          = 40              {product}         
     intx MinInliningThreshold                      = 250             {product}         
     intx MinJumpTableSize                          = 18              {C2 product}      
    uintx MinPermHeapExpansion                      = 340784          {product}         
    uintx MinRAMFraction                            = 2               {product}         
    uintx MinSurvivorRatio                          = 3               {product}         
    uintx MinTLABSize                               = 2048            {product}         
     intx MonitorBound                              = 0               {product}         
     bool MonitorInUseLists                         = false           {product}         
     intx MultiArrayExpandLimit                     = 6               {C2 product}      
     bool MustCallLoadClassInternal                 = false           {product}         
     intx NUMAChunkResizeWeight                     = 20              {product}         
     intx NUMAPageScanRate                          = 256             {product}         
     intx NUMASpaceResizeRate                       = 1073741824      {product}         
     bool NUMAStats                                 = false           {product}         
     intx NativeMonitorFlags                        = 0               {product}         
     intx NativeMonitorSpinLimit                    = 20              {product}         
     intx NativeMonitorTimeout                      = -1              {product}         
     bool NeedsDeoptSuspend                         = false           {pd product}      
     bool NeverActAsServerClassMachine              = false           {pd product}      
     bool NeverTenure                               = false           {product}         
     intx NewRatio                                  = 2               {product}         
    uintx NewSize                                   = 1363144         {product}         
    uintx NewSizeThreadIncrease                     = 5320            {pd product}      
     intx NmethodSweepCheckInterval                 = 5               {product}
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