IBM User Guide for Java V7 on Windows > Reference > Command-line options

JIT and AOT command-line options

Use these JIT and AOT compiler command-line options to control code compilation.

For more information about JIT and AOT, see JIT and AOT problem determination.

• -Xaot
  Use this option to control the behavior of the AOT compiler.
• -Xcodecache
  This option is used to tune performance.
• -XcompilationThreads
  Use this option to specify the number of compilation threads that are used by the JIT compiler.
• -Xint
  This option makes the JVM use the Interpreter only, disabling the Just-In-Time (JIT) and Ahead-Of-Time (AOT) compilers.
• -Xjit
  Use this option to control the behavior of the JIT compiler.
• -Xnoaot
  This option turns off the AOT compiler and disables the use of AOT-compiled code.
• -Xnojit
  This option turns off the JIT compiler.
• -Xquickstart
  This option causes the JIT compiler to run with a subset of optimizations.
• -XsamplingExpirationTime
  Use this option to disable JIT sampling after a specified amount of time.
• -Xscmaxaot
  Optionally applies a maximum number of bytes in the class cache that can be used for AOT data.
• -Xscmaxjitdata
  Optionally applies a maximum number of bytes in the class cache that can be used for JIT data.
• -Xscminaot
  Optionally applies a minimum number of bytes in the class cache to reserve for AOT data.
• -Xscminjitdata
  Optionally applies a minimum number of bytes in the class cache to reserve for JIT data.

Parent: Command-line options

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