Hotspot JVM Options in Java
Java developers has used N no. of JVM parameters or JVM Options inside JDK to handle to application process. Since its used or changed very rarely by developers and also its hard to remember all the JVM options. We have heard about Java Heap Size, printing Garbage Collection details etc., in Java. In most of application we will be worried about using Garbage Collection and to maintain memory very efficiently. Next about how to do performance tuning in Java. Apart from these 2 there are lot of JVM options. All these options can be changed in JVM options command from its default values.
Lets see few JVM Options and how to change those values according to our application need from its default value. For more detail on Hotspot JVM Options you can refer to official site link.
Using "java -help" we can get the list of help options where "-X print help on non-standard options". -X are non-standard and subject to change without notice in subsequent releases of the JDK. -XX are not stable and are not recommended since these options are subject to change without notice.
java -X
-Xmixed mixed mode execution (default)
-Xint interpreted mode execution only
-Xbootclasspath:<directories and zip/jar files separated by :>
set search path for bootstrap classes and resources
-Xbootclasspath/a:<directories and zip/jar files separated by :>
append to end of bootstrap class path
-Xbootclasspath/p:<directories and zip/jar files separated by :>
prepend in front of bootstrap class path
-Xnoclassgc disable class garbage collection
-Xincgc enable incremental garbage collection
-Xloggc:<file> log GC status to a file with time stamps
-Xbatch disable background compilation
-Xms<size> set initial Java heap size
-Xmx<size> set maximum Java heap size
-Xss<size> set java thread stack size
-Xprof output cpu profiling data
-Xfuture enable strictest checks, anticipating future default
-Xrs reduce use of OS signals by Java/VM (see documentation)
-Xcheck:jni perform additional checks for JNI functions
-Xshare:off do not attempt to use shared class data
-Xshare:auto use shared class data if possible (default)
-Xshare:on require using shared class data, otherwise fail.
Numeric Hotspot JVM Options can be by -XX:=. Numbers can include 'm' or 'M' for megabytes, 'k' or 'K' for kilobytes, and 'g' or 'G' for gigabytes (for example, " java -Xmx10m " will set maximum Java heap size with 10 megabytes which is 10240 kilobytes).
Boolean Hotspot JVM options can be turned on by -XX:+ and can be turned off by -XX:-. Here "+" for true and "-" for false.
java -XX:+PrintGCDetails
Heap
def new generation total 19008K, used 681K [0x00000000b7a00000, 0x00000000b8ea0000, 0x00000000cc4a0000)
eden space 16896K, 4% used [0x00000000b7a00000, 0x00000000b7aaa6a8, 0x00000000b8a80000)
from space 2112K, 0% used [0x00000000b8a80000, 0x00000000b8a80000, 0x00000000b8c90000)
to space 2112K, 0% used [0x00000000b8c90000, 0x00000000b8c90000, 0x00000000b8ea0000)
tenured generation total 42304K, used 0K [0x00000000cc4a0000, 0x00000000cedf0000, 0x00000000f5a00000)
the space 42304K, 0% used [0x00000000cc4a0000, 0x00000000cc4a0000, 0x00000000cc4a0200, 0x00000000cedf0000)
compacting perm gen total 21248K, used 3244K [0x00000000f5a00000, 0x00000000f6ec0000, 0x0000000100000000)
the space 21248K, 15% used [0x00000000f5a00000, 0x00000000f5d2b318, 0x00000000f5d2b400, 0x00000000f6ec0000)
No shared spaces configured.
String Hotspot JVM options can be set using -XX:=, specify file, path, or a list of commands.
Below are the list of Hotspot JVM Options
[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 = 256 {product}
intx AllocatePrefetchInstr = 0 {product}
intx AllocatePrefetchLines = 3 {product}
intx AllocatePrefetchStepSize = 64 {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}
intx CICompilerCount = 2 {product}
bool CICompilerCountPerCPU = false {product}
bool CITime = false {product}
bool CMSAbortSemantics = false {product}
uintx CMSAbortablePrecleanMinWorkPerIteration = 100 {product}
intx CMSAbortablePrecleanWaitMillis = 100 {product}
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 = {product}
double CMSLargeSplitSurplusPercent = {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 = {product}
double CMSSmallSplitSurplusPercent = {product}
bool CMSSplitIndexedFreeListBlocks = true {product}
intx CMSTriggerPermRatio = 80 {product}
intx CMSTriggerRatio = 80 {product}
bool CMSUseOldDefaults = false {product}
intx CMSWaitDuration = 2000 {product}
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}
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}
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 = {product}
bool FailOverToOldVerifier = true {product}
bool FastTLABRefill = true {product}
intx FenceInstruction = 0 {product}
intx FieldsAllocationStyle = 1 {product}
bool FilterSpuriousWakeups = true {product}
bool ForceFullGCJVMTIEpilogues = false {product}
bool ForceNUMA = false {product}
bool ForceSharedSpaces = 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}
intx G1SATBBufferSize = 1024 {product}
intx G1UpdateBufferSize = 256 {product}
bool G1UseAdaptiveConcRefinement = true {product}
uintx GCDrainStackTargetSize = 64 {product}
uintx GCHeapFreeLimit = 2 {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}
bool HandlePromotionFailure = true {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 := 64932608 {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}
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 = 18446744073709551615 {product}
uintx MaxGCPauseMillis = 18446744073709551615 {product}
uintx MaxHeapFreeRatio = 70 {product}
uintx MaxHeapSize := 1040187392 {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}
uintx MaxLiveObjectEvacuationRatio = 100 {product}
intx MaxLoopPad = 11 {C2 product}
uintx MaxNewSize = 18446744073709486080 {product}
intx MaxNodeLimit = 65000 {C2 product}
uintx MaxPermHeapExpansion = 5439488 {product}
uintx MaxPermSize = 174063616 {pd product}
uint64_t MaxRAM = 137438953472 {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 = 196608 {product}
uintx MinHeapFreeRatio = 40 {product}
intx MinInliningThreshold = 250 {product}
intx MinJumpTableSize = 18 {C2 product}
uintx MinPermHeapExpansion = 327680 {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 = 1310720 {product}
uintx NewSizeThreadIncrease = 5320 {pd product}
intx NmethodSweepCheckInterval = 5 {product}
intx NmethodSweepFraction = 4 {product}
intx NodeLimitFudgeFactor = 1000 {C2 product}
intx NumberOfLoopInstrToAlign = 4 {C2 product}
intx ObjectAlignmentInBytes = 8 {lp64_product}
uintx OldPLABSize = 1024 {product}
uintx OldPLABWeight = 50 {product}
uintx OldSize = 5439488 {product}
bool OmitStackTraceInFastThrow = true {product}
ccstrlist OnError = {product}
ccstrlist OnOutOfMemoryError = {product}
intx OnStackReplacePercentage = 140 {pd product}
bool OptimizeFill = false {C2 product}
bool OptimizeStringConcat = false {C2 product}
bool OptoBundling = false {C2 pd product}
intx OptoLoopAlignment = 16 {pd product}
bool OptoScheduling = false {C2 pd product}
uintx PLABWeight = 75 {product}
bool PSChunkLargeArrays = true {product}
intx ParGCArrayScanChunk = 50 {product}
uintx ParGCDesiredObjsFromOverflowList = 20 {product}
bool ParGCTrimOverflow = true {product}
bool ParGCUseLocalOverflow = false {product}
intx ParallelGCBufferWastePct = 10 {product}
bool ParallelGCRetainPLAB = true {product}
uintx ParallelGCThreads = 0 {product}
bool ParallelGCVerbose = false {product}
uintx ParallelOldDeadWoodLimiterMean = 50 {product}
uintx ParallelOldDeadWoodLimiterStdDev = 80 {product}
bool ParallelRefProcBalancingEnabled = true {product}
bool ParallelRefProcEnabled = false {product}
bool PartialPeelAtUnsignedTests = true {C2 product}
bool PartialPeelLoop = true {C2 product}
intx PartialPeelNewPhiDelta = 0 {C2 product}
uintx PausePadding = 1 {product}
intx PerBytecodeRecompilationCutoff = 200 {product}
intx PerBytecodeTrapLimit = 4 {product}
intx PerMethodRecompilationCutoff = 400 {product}
intx PerMethodTrapLimit = 100 {product}
bool PerfAllowAtExitRegistration = false {product}
bool PerfBypassFileSystemCheck = false {product}
intx PerfDataMemorySize = 32768 {product}
intx PerfDataSamplingInterval = 50 {product}
ccstr PerfDataSaveFile = {product}
bool PerfDataSaveToFile = false {product}
bool PerfDisableSharedMem = false {product}
intx PerfMaxStringConstLength = 1024 {product}
uintx PermGenPadding = 3 {product}
uintx PermMarkSweepDeadRatio = 20 {product}
uintx PermSize = 21757952 {pd product}
bool PostSpinYield = true {product}
intx PreBlockSpin = 10 {product}
intx PreInflateSpin = 10 {pd product}
bool PreSpinYield = false {product}
bool PreferInterpreterNativeStubs = false {pd product}
intx PrefetchCopyIntervalInBytes = 576 {product}
intx PrefetchFieldsAhead = 1 {product}
intx PrefetchScanIntervalInBytes = 576 {product}
bool PreserveAllAnnotations = false {product}
uintx PreserveMarkStackSize = 1024 {product}
uintx PretenureSizeThreshold = 0 {product}
bool PrintAdaptiveSizePolicy = false {product}
bool PrintCMSInitiationStatistics = false {product}
intx PrintCMSStatistics = 0 {product}
bool PrintClassHistogram = false {manageable}
bool PrintClassHistogramAfterFullGC = false {manageable}
bool PrintClassHistogramBeforeFullGC = false {manageable}
bool PrintCommandLineFlags = false {product}
bool PrintCompilation = false {product}
bool PrintConcurrentLocks = false {manageable}
intx PrintFLSCensus = 0 {product}
intx PrintFLSStatistics = 0 {product}
bool PrintFlagsFinal := true {product}
bool PrintFlagsInitial = false {product}
bool PrintGC = false {manageable}
bool PrintGCApplicationConcurrentTime = false {product}
bool PrintGCApplicationStoppedTime = false {product}
bool PrintGCDateStamps = false {manageable}
bool PrintGCDetails = false {manageable}
bool PrintGCTaskTimeStamps = false {product}
bool PrintGCTimeStamps = false {manageable}
bool PrintHeapAtGC = false {product rw}
bool PrintHeapAtGCExtended = false {product rw}
bool PrintHeapAtSIGBREAK = true {product}
bool PrintJNIGCStalls = false {product}
bool PrintJNIResolving = false {product}
bool PrintOldPLAB = false {product}
bool PrintOopAddress = false {product}
bool PrintPLAB = false {product}
bool PrintParallelOldGCPhaseTimes = false {product}
bool PrintPreciseBiasedLockingStatistics = false {C2 diagnostic}
bool PrintPromotionFailure = false {product}
bool PrintReferenceGC = false {product}
bool PrintRevisitStats = false {product}
bool PrintSafepointStatistics = false {product}
intx PrintSafepointStatisticsCount = 300 {product}
intx PrintSafepointStatisticsTimeout = -1 {product}
bool PrintSharedSpaces = false {product}
bool PrintTLAB = false {product}
bool PrintTenuringDistribution = false {product}
bool PrintVMOptions = false {product}
bool PrintVMQWaitTime = false {product}
uintx ProcessDistributionStride = 4 {product}
bool ProfileInterpreter = true {pd product}
bool ProfileIntervals = false {product}
intx ProfileIntervalsTicks = 100 {product}
intx ProfileMaturityPercentage = 20 {product}
bool ProfileVM = false {product}
bool ProfilerPrintByteCodeStatistics = false {product}
bool ProfilerRecordPC = false {product}
uintx PromotedPadding = 3 {product}
intx QueuedAllocationWarningCount = 0 {product}
bool RangeCheckElimination = true {product}
intx ReadPrefetchInstr = 0 {product}
intx ReadSpinIterations = 100 {product}
bool ReassociateInvariants = true {C2 product}
bool ReduceBulkZeroing = true {C2 product}
bool ReduceFieldZeroing = true {C2 product}
bool ReduceInitialCardMarks = true {C2 product}
bool ReduceSignalUsage = false {product}
intx RefDiscoveryPolicy = 0 {product}
bool ReflectionWrapResolutionErrors = true {product}
bool RegisterFinalizersAtInit = true {product}
bool RelaxAccessControlCheck = false {product}
bool RequireSharedSpaces = false {product}
uintx ReservedCodeCacheSize = 50331648 {pd product}
bool ResizeOldPLAB = true {product}
bool ResizePLAB = true {product}
bool ResizeTLAB = true {pd product}
bool RestoreMXCSROnJNICalls = false {product}
bool RewriteBytecodes = false {pd product}
bool RewriteFrequentPairs = false {pd product}
intx SafepointSpinBeforeYield = 2000 {product}
bool SafepointTimeout = false {product}
intx SafepointTimeoutDelay = 10000 {product}
bool ScavengeBeforeFullGC = true {product}
intx SelfDestructTimer = 0 {product}
uintx SharedDummyBlockSize = 536870912 {product}
uintx SharedMiscCodeSize = 4194304 {product}
uintx SharedMiscDataSize = 4194304 {product}
uintx SharedReadOnlySize = 10485760 {product}
uintx SharedReadWriteSize = 12582912 {product}
bool ShowMessageBoxOnError = false {product}
intx SoftRefLRUPolicyMSPerMB = 1000 {product}
bool SplitIfBlocks = true {product}
intx StackRedPages = 1 {pd product}
intx StackShadowPages = 6 {pd product}
bool StackTraceInThrowable = true {product}
intx StackYellowPages = 2 {pd product}
bool StartAttachListener = false {product}
intx StarvationMonitorInterval = 200 {product}
bool StressLdcRewrite = false {product}
bool StressTieredRuntime = false {product}
bool SuppressFatalErrorMessage = false {product}
uintx SurvivorPadding = 3 {product}
intx SurvivorRatio := 6 {product}
intx SuspendRetryCount = 50 {product}
intx SuspendRetryDelay = 5 {product}
intx SyncFlags = 0 {product}
ccstr SyncKnobs = {product}
intx SyncVerbose = 0 {product}
uintx TLABAllocationWeight = 35 {product}
uintx TLABRefillWasteFraction = 64 {product}
uintx TLABSize = 0 {product}
bool TLABStats = true {product}
uintx TLABWasteIncrement = 4 {product}
uintx TLABWasteTargetPercent = 1 {product}
intx TargetPLABWastePct = 10 {product}
intx TargetSurvivorRatio = 50 {product}
uintx TenuredGenerationSizeIncrement = 20 {product}
uintx TenuredGenerationSizeSupplement = 80 {product}
uintx TenuredGenerationSizeSupplementDecay = 2 {product}
intx ThreadPriorityPolicy = 0 {product}
bool ThreadPriorityVerbose = false {product}
uintx ThreadSafetyMargin = 52428800 {product}
intx ThreadStackSize = 1024 {pd product}
uintx ThresholdTolerance = 10 {product}
intx Tier1BytecodeLimit = 10 {product}
intx Tier1FreqInlineSize = 35 {C2 product}
intx Tier1Inline = 0 {C2 product}
intx Tier1LoopOptsCount = 0 {C2 product}
intx Tier1MaxInlineSize = 8 {C2 product}
bool Tier1UpdateMethodData = false {product}
intx Tier2BackEdgeThreshold = 100000 {pd product}
intx Tier2CompileThreshold = 10000 {pd product}
intx Tier3BackEdgeThreshold = 100000 {pd product}
intx Tier3CompileThreshold = 20000 {pd product}
intx Tier4BackEdgeThreshold = 100000 {pd product}
intx Tier4CompileThreshold = 40000 {pd product}
bool TieredCompilation = false {pd product}
bool TraceBiasedLocking = false {product}
bool TraceClassLoading = false {product rw}
bool TraceClassLoadingPreorder = false {product}
bool TraceClassResolution = false {product}
bool TraceClassUnloading = false {product rw}
bool TraceGen0Time = false {product}
bool TraceGen1Time = false {product}
ccstr TraceJVMTI = {product}
bool TraceLoaderConstraints = false {product rw}
bool TraceMonitorInflation = false {product}
bool TraceParallelOldGCTasks = false {product}
intx TraceRedefineClasses = 0 {product}
bool TraceSafepointCleanupTime = false {product}
bool TraceSuperWord = false {C2 product}
bool TraceSuspendWaitFailures = false {product}
intx TrackedInitializationLimit = 50 {C2 product}
intx TypeProfileMajorReceiverPercent = 90 {product}
intx TypeProfileWidth = 2 {product}
intx UnguardOnExecutionViolation = 0 {product}
bool Use486InstrsOnly = false {product}
bool UseAdaptiveGCBoundary = false {product}
bool UseAdaptiveGenerationSizePolicyAtMajorCollection = true {product}
bool UseAdaptiveGenerationSizePolicyAtMinorCollection = true {product}
bool UseAdaptiveNUMAChunkSizing = true {product}
bool UseAdaptiveSizeDecayMajorGCCost = true {product}
bool UseAdaptiveSizePolicy = true {product}
bool UseAdaptiveSizePolicyFootprintGoal = true {product}
bool UseAdaptiveSizePolicyWithSystemGC = false {product}
bool UseAddressNop = true {product}
bool UseAltSigs = false {product}
bool UseAutoGCSelectPolicy = false {product}
bool UseBiasedLocking = true {product}
bool UseBimorphicInlining = true {C2 product}
bool UseBoundThreads = true {product}
bool UseCMSBestFit = true {product}
bool UseCMSCollectionPassing = true {product}
bool UseCMSCompactAtFullCollection = true {product}
bool UseCMSInitiatingOccupancyOnly = false {product}
bool UseCodeCacheFlushing = false {product}
bool UseCompiler = true {product}
bool UseCompilerSafepoints = true {product}
bool UseCompressedOops := true {lp64_product}
bool UseConcMarkSweepGC = false {product}
bool UseCountLeadingZerosInstruction = false {product}
bool UseCounterDecay = true {product}
bool UseDivMod = true {C2 product}
bool UseFPUForSpilling = false {C2 product}
bool UseFastAccessorMethods = true {product}
bool UseFastEmptyMethods = true {product}
bool UseFastJNIAccessors = true {product}
bool UseG1GC = false {product}
bool UseGCOverheadLimit = true {product}
bool UseGCTaskAffinity = false {product}
bool UseHeavyMonitors = false {product}
bool UseInlineCaches = true {product}
bool UseInterpreter = true {product}
bool UseJumpTables = true {C2 product}
bool UseLWPSynchronization = true {product}
bool UseLargePages = false {pd product}
bool UseLargePagesIndividualAllocation = false {pd product}
bool UseLinuxPosixThreadCPUClocks = false {product}
bool UseLoopCounter = true {product}
bool UseLoopPredicate = true {C2 product}
bool UseMaximumCompactionOnSystemGC = true {product}
bool UseMembar = false {product}
bool UseNUMA = false {product}
bool UseNewLongLShift = false {product}
bool UseNiagaraInstrs = false {product}
bool UseOSErrorReporting = false {pd product}
bool UseOldInlining = true {C2 product}
bool UseOnStackReplacement = true {pd product}
bool UseOnlyInlinedBimorphic = true {C2 product}
bool UseOprofile = false {product}
bool UseOptoBiasInlining = true {C2 product}
bool UsePSAdaptiveSurvivorSizePolicy = true {product}
bool UseParNewGC = false {product}
bool UseParallelDensePrefixUpdate = true {product}
bool UseParallelGC = false {product}
bool UseParallelOldGC = false {product}
bool UseParallelOldGCCompacting = true {product}
bool UseParallelOldGCDensePrefix = true {product}
bool UsePerfData = true {product}
bool UsePopCountInstruction = true {product}
intx UseSSE = 4 {product}
bool UseSSE42Intrinsics = true {product}
bool UseSerialGC = false {product}
bool UseSharedSpaces = false {product}
bool UseSignalChaining = true {product}
bool UseSpinning = false {product}
bool UseSplitVerifier = true {product}
bool UseStoreImmI16 = false {product}
bool UseStringCache = false {product}
bool UseSuperWord = true {C2 product}
bool UseTLAB = true {pd product}
bool UseThreadPriorities = true {pd product}
bool UseTypeProfile = true {product}
bool UseUnalignedLoadStores = false {product}
bool UseVMInterruptibleIO = true {product}
bool UseVectoredExceptions = false {pd product}
bool UseXMMForArrayCopy = true {product}
bool UseXmmI2D = false {product}
bool UseXmmI2F = false {product}
bool UseXmmLoadAndClearUpper = true {product}
bool UseXmmRegToRegMoveAll = true {product}
bool VMThreadHintNoPreempt = false {product}
intx VMThreadPriority = -1 {product}
intx VMThreadStackSize = 1024 {pd product}
intx ValueSearchLimit = 1000 {C2 product}
bool VerifyMergedCPBytecodes = true {product}
intx WorkAroundNPTLTimedWaitHang = 1 {product}
uintx YoungGenerationSizeIncrement = 20 {product}
uintx YoungGenerationSizeSupplement = 80 {product}
uintx YoungGenerationSizeSupplementDecay = 8 {product}
uintx YoungPLABSize = 4096 {product}
bool ZeroTLAB = false {product}
intx hashCode = 0 {product}