VM Options Explorer - Switch comparison of OpenJDK21 vs SapMachine JDK21


SapMachine JDK21 changed default values for:

NameOpenJDK21 valueSapMachine JDK21 value
ExtensiveErrorReportsPRODUCT_ONLY(false) NOT_PRODUCT(true)PRODUCT_ONLY(true) NOT_PRODUCT(true)
GuaranteedSafepointInterval10000
JVMCINativeLibraryThreadFraction0.330.66
LogEventsBufferEntries2075
PrintExtendedThreadInfofalsetrue
ShenandoahImmediateThreshold9070
ZFragmentationLimit0 /* ignored */5.0

SapMachine JDK21 added:

AOTAdapterCaching
AOTCache
AOTCacheOutput
AOTCacheParallelRelocation
AOTClassLinking
AOTCodeMaxSize
AOTCompileEagerly
AOTConfiguration
AOTInitTestClass
AOTInvokeDynamicLinking
AOTMode
AOTPrintTrainingInfo
AOTRecordTraining
AOTReplayTraining
AOTStubCaching
AOTVerifyTrainingData
AbortVMOnAOTCodeFailure
AbortVMOnSafepointTimeoutDelay
AlwaysRecordEvolDependencies
AutoVectorizationOverrideProfitability
BinarySearchThreshold
CaptureBailoutInformation
DeoptimizeOnAllocationException
DumpVitalsAtExit
EnableVitals
EnableX86ECoreOpts
ExitVMOnOutOfMemoryError
FullGCHeapDumpLimit
G1CPUUsageDeviationPercent
G1CPUUsageExpandThreshold
G1CPUUsageShrinkThreshold
G1GCAllocationFailureALot
G1GCAllocationFailureALotCSetPercent
G1GCAllocationFailureALotCount
G1GCAllocationFailureALotDuringConcMark
G1GCAllocationFailureALotDuringConcurrentStart
G1GCAllocationFailureALotDuringMixedGC
G1GCAllocationFailureALotDuringYoungGC
G1GCAllocationFailureALotInterval
G1NumCodeRootsCostSampleThreshold
G1NumCollectionsKeepPinned
G1OldCSetGroupSize
G1RetainRegionLiveThresholdPercent
G1ShrinkByPercentOfAvailable
HiMemReport
HiMemReportDir
HiMemReportExec
HiMemReportMax
IFGEdgesLimit
KillPathsReachableByDeadTypeNode
LibJVMCICompilerThreadHidden
LightweightFastLockingSpins
LogClassLoadingCauseFor
LoopMultiversioning
MallocTraceAtStartup
MallocTraceDetailedStats
MallocTraceDumpCount
MallocTraceDumpDelay
MallocTraceDumpFilter
MallocTraceDumpHideDumpAllocs
MallocTraceDumpInternalStats
MallocTraceDumpInterval
MallocTraceDumpMaxEntries
MallocTraceDumpOnError
MallocTraceDumpOutput
MallocTraceDumpPercentage
MallocTraceDumpSortByCount
MallocTraceEnableDelay
MallocTraceExitIfFail
MallocTraceOnlyNth
MallocTraceRainyDayFund
MallocTraceStackDepth
MallocTraceTrackFree
MallocTraceUnwindLibName
MallocTraceUseBacktrace
MaxStringPrintSize
MergeStores
PrintCompilerMemoryStatisticsAtExit
PrintMemoryMapAtExit
PrintPhaseLevel
PrintVMInfoAtExit
PrintVitalsAtExit
ProfileExceptionHandlers
RandomizeClassSpaceLocation
ReduceAllocationMerges
ServiceThreadCleanupInterval
ShenandoahAgingCyclePeriod
ShenandoahAllowOldMarkingPreemption
ShenandoahCardBarrier
ShenandoahCardStatsLogInterval
ShenandoahCoalesceChance
ShenandoahDoNotIgnoreGrowthAfterYoungCycles
ShenandoahEnableCardStats
ShenandoahExpediteMixedThreshold
ShenandoahExpeditePromotionsThreshold
ShenandoahGenerationalAdaptiveTenuring
ShenandoahGenerationalCensusAtEvac
ShenandoahGenerationalCensusIgnoreOlderCohorts
ShenandoahGenerationalHumongousReserve
ShenandoahGenerationalMaxTenuringAge
ShenandoahGenerationalMinTenuringAge
ShenandoahGenerationalTenuringCohortPopulationThreshold
ShenandoahGenerationalTenuringMortalityRateThreshold
ShenandoahGuaranteedOldGCInterval
ShenandoahGuaranteedYoungGCInterval
ShenandoahIgnoreGarbageThreshold
ShenandoahIgnoreOldGrowthBelowPercentage
ShenandoahMaxYoungPercentage
ShenandoahMinOldGenGrowthPercent
ShenandoahMinYoungPercentage
ShenandoahMinimumOldTimeMs
ShenandoahNoProgressThreshold
ShenandoahOldCompactionReserve
ShenandoahOldEvacRatioPercent
ShenandoahOldEvacWaste
ShenandoahOldGarbageThreshold
ShenandoahPromoEvacWaste
ShortRunningLongLoop
SimulateFullAddressSpace
SkipTier2IfPossible
StoreVitalsExtremas
StressBailout
StressBailoutMean
StressLoopPeeling
StressMacroElimination
StressMacroExpansion
StressPrunedExceptionHandlers
StressShortRunningLongLoop
StressUnstableIfTraps
SuperWordAutomaticAlignment
TestAOTAdapterLinkFailure
TestingAsyncLoggingDeathTest
TestingAsyncLoggingDeathTestNoCrash
Tier0ProfileDelayFactor
Tier2ProfileDelayFactor
TraceBytecodesStopAt
TraceBytecodesTruncated
TraceLoopMultiversioning
TraceReduceAllocationMerges
TypeProfileSubTypeCheckCommonThreshold
UseAPX
UseClassMetaspaceForAllClasses
UseCompactObjectHeaders
UseDilithiumIntrinsics
UseIntPolyIntrinsics
UseKyberIntrinsics
UseMallocHooks
UseObjectMonitorTable
UseStoreStoreForCtor
UseThreadsLockThrottleLock
UserThreadWaitAttemptsAtExit
VerifyAlignVector
VerifyConstraintCasts
VerifyInlineCaches
VerifyNoNewIrreducibleLoops
VerifyReduceAllocationMerges
VitalsFile
VitalsLockFreeSampling
VitalsLongTermSampleIntervalMinutes
VitalsLongTermTableDays
VitalsSampleInterval
VitalsShortTermTableHours
X86ICacheSync
ZFakeNUMA
ZStressFastMediumPageAllocation
ZUseMediumPageSizeRange

SapMachine JDK21 removed:

AdaptiveSizeMajorGCDecayTimeScale
AdaptiveSizePolicyCollectionCostMargin
AdaptiveSizePolicyInitializingSteps
AdaptiveSizePolicyOutputInterval
AdaptiveSizeThroughPutPolicy
AdaptiveTimeWeight
ArrayAllocatorMallocLimit
BaseFootPrintEstimate
DoReserveCopyInSuperWord
ExpandSubTypeCheckAtParseTime
G1EvacuationFailureALot
G1EvacuationFailureALotCSetPercent
G1EvacuationFailureALotCount
G1EvacuationFailureALotDuringConcMark
G1EvacuationFailureALotDuringConcurrentStart
G1EvacuationFailureALotDuringMixedGC
G1EvacuationFailureALotDuringYoungGC
G1EvacuationFailureALotInterval
GCLockerEdenExpansionPercent
GCLockerRetryAllocationCount
HeapFirstMaximumCompactionCount
InitialRAMFraction
InlineCacheBufferSize
LockingMode
MaxGCMinorPauseMillis
MaxRAMFraction
MinRAMFraction
NUMAPageScanRate
OldSize
ParallelOldDeadWoodLimiterMean
ParallelOldDeadWoodLimiterStdDev
PausePadding
PerfDataSamplingInterval
PostLoopMultiversioning
PreserveAllAnnotations
PrintMethodFlushingStatistics
PrintPreciseRTMLockingStatistics
ProcessDistributionStride
RegisterFinalizersAtInit
ScavengeBeforeFullGC
ShenandoahHumongousThreshold
ShenandoahIUBarrier
ShenandoahPacing
ShenandoahPacingCycleSlack
ShenandoahPacingIdleSlack
ShenandoahPacingMaxDelay
ShenandoahPacingSurcharge
SurvivorPadding
TLABStats
TenuredGenerationSizeIncrement
TenuredGenerationSizeSupplement
TenuredGenerationSizeSupplementDecay
UseAdaptiveGenerationSizePolicyAtMajorCollection
UseAdaptiveGenerationSizePolicyAtMinorCollection
UseAdaptiveSizeDecayMajorGCCost
UseAdaptiveSizePolicyFootprintGoal
UseAdaptiveSizePolicyWithSystemGC
UseCounterDecay
UseEmptySlotsInSupers
UseHugeTLBFS
UseLinuxPosixThreadCPUClocks
UseNotificationThread
UseOprofile
UsePSAdaptiveSurvivorSizePolicy
UseSHM
UseVtableBasedCHA
VerifyAdapterCalls
VerifyGCLevel
VerifyObjectStartArray
VerifyRememberedSets
ZAsyncUnmappingLimit
ZGenerational
ZMarkStackSpaceLimit
ZVerifyViews