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jvm opts

+AdjustConcurrency +AggressiveOpts +AllowJNIEnvProxy +AllowParallelDefineClass +AllowUserSignalHandlers +AlwaysActAsServerClassMachine +AlwaysCompileLoopMethods +AlwaysLockClassLoader +AlwaysPreTouch +AlwaysRestoreFPU +AlwaysTenure +AnonymousClasses +AssertOnSuspendWaitFailure +BackgroundCompilation +BeParanoid +BindGCTaskThreadsToCPUs +BlockLayoutByFrequency +BlockLayoutRotateLoops +BlockOffsetArrayUseUnallocatedBlock +BranchOnRegister +BytecodeVerificationLocal +BytecodeVerificationRemote +C1OptimizeVirtualCallProfiling +C1ProfileBranches +C1ProfileCalls +C1ProfileCheckcasts +C1ProfileInlinedCalls +C1ProfileVirtualCalls +C1UpdateMethodData +CICompilerCountPerCPU +CITime +CMSAbortSemantics +CMSClassUnloadingEnabled +CMSCleanOnEnter +CMSCompactWhenClearAllSoftRefs +CMSConcurrentMTEnabled +CMSDumpAtPromotionFailure +CMSExtrapolateSweep +CMSIncrementalMode +CMSIncrementalPacing +CMSLoopWarn +CMSOldPLABResizeQuicker +CMSPLABRecordAlways +CMSParallelRemarkEnabled +CMSParallelSurvivorRemarkEnabled +CMSPermGenPrecleaningEnabled +CMSPrecleanRefLists1 +CMSPrecleanRefLists2 +CMSPrecleanSurvivors1 +CMSPrecleanSurvivors2 +CMSPrecleaningEnabled +CMSPrintChunksInDump +CMSPrintObjectsInDump +CMSReplenishIntermediate […]

JVM

JVM parameters set whether you know, here and share with you, including JVMHeap regional distribution, JVM’s two GC threads and Stack set and several other parts, I believe that this introduction to your study will be helpful.

Detailed JVM parameter settings

JVMHeap regional distribution:

JavaHeap is divided into three zones, Young, Old and Permanent. Young […]

Java tunning

The general tuning guidelines for java VM. Here are some general tunning guideline to help you categorize the kinds of java tunning you will perform: 1. Be aware of ergonomics settings The -server: server compiler The -XX:+useParallelGC: parallel garbage collector The -Xms: initial heap size is 1/64th of the machine’s physical memory The -Xmx: maximum […]