Option and Default Value
|
Description |
| -XX:-AllowUserSignalHandlers |
Do not complain if the application installs signal handlers. (Relevant to Solaris and Linux only.)
|
| -XX:AltStackSize=16384 |
Alternate signal stack size (in Kbytes). (Relevant to Solaris only, removed from 5.0.)
|
| -XX:-DisableExplicitGC |
Disable calls to System.gc(), JVM still performs garbage collection when necessary.
|
| -XX:+FailOverToOldVerifier |
Fail over to old verifier when the new type checker fails. (Introduced in 6.)
|
| -XX:+HandlePromotionFailure |
The youngest generation collection does not require a guarantee of full promotion of all live objects. (Introduced in 1.4.2 update 11) [5.0 and earlier: false.]
|
| -XX:+MaxFDLimit |
Bump the number of file descriptors to max. (Relevant? to Solaris only.)
|
| -XX:PreBlockSpin=10 |
Spin count variable for use with -XX:+UseSpinning. Controls the maximum spin iterations allowed before entering operating system thread synchronization code. (Introduced in 1.4.2.)
|
| -XX:-RelaxAccessControlCheck |
Relax the access control checks in the verifier. (Introduced in 6.)
|
| -XX:+ScavengeBeforeFullGC |
Do young generation GC prior to a full GC. (Introduced in 1.4.1.)
|
| -XX:+UseAltSigs |
Use alternate signals instead of SIGUSR1 and SIGUSR2 for VM internal signals. (Introduced in 1.3.1 update 9, 1.4.1. Relevant to Solaris only.)
|
| -XX:+UseBoundThreads |
Bind user level threads to kernel threads. (Relevant to Solaris only.)
|
| -XX:-UseConcMarkSweepGC |
Use concurrent mark-sweep collection for the old generation. (Introduced in 1.4.1)
|
| -XX:+UseGCOverheadLimit |
Use a policy that limits the proportion of the VM's time that is spent in GC before an OutOfMemory error is thrown. (Introduced in 6.)
|
| -XX:+UseLWPSynchronization |
Use LWP-based instead of thread based synchronization. (Introduced in 1.4.0. Relevant to Solaris only.)
|
| -XX:-UseParallelGC |
Use parallel garbage collection for scavenges. (Introduced in 1.4.1)
|
| -XX:-UseParallelOldGC |
Use parallel garbage collection for the full collections. Enabling this option automatically sets -XX:+UseParallelGC. (Introduced in 5.0 update 6.)
|
| -XX:-UseSerialGC |
Use serial garbage collection. (Introduced in 5.0.)
|
| -XX:-UseSpinning |
Enable naive spinning on Java monitor before entering operating system thread synchronizaton code. (Relevant to 1.4.2 and 5.0 only.) [1.4.2, multi-processor Windows platforms: true]
|
| -XX:+UseTLAB |
Use thread-local object allocation (Introduced in 1.4.0, known as UseTLE prior to that.) [1.4.2 and earlier, x86 or with -client: false]
|
| -XX:+UseSplitVerifier |
Use the new type checker with StackMapTable attributes. (Introduced in 5.0.)[5.0: false]
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| -XX:+UseThreadPriorities |
Use native thread priorities.
|
| -XX:+UseVMInterruptibleIO |
Thread interrupt before or with EINTR for I/O operations results in OS_INTRPT. (Introduced in 6. Relevant to Solaris only.)
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