The shared classes data component provides some verbose options that can be used at runtime to show cache activity. Not every method that gets called by an application is compiled. The hotter the optimization level, the better the expected performance, but the higher the cost in terms of CPU and memory. The information includes object address, type or class name, size, and references to other objects. If you require -Xrealtime functionality, contact your IBM support representative. The second parameter gives further information about the failure. The JVM continues but might end later if the error occurred in a critical area. 
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By default, OpenJ9 always shares both the bootstrap and application classes that are loaded by the default system class loader.
This information message is shown when the option -Xthr: Different types of diagnostic data are automatically produced by default when certain events occur, but can also be triggered from the command line.
This message is produced when a library cannot be loaded. Correct the option specified with -Xjni. The JVM ignores the -Xscmaxjitdata option and continues.
To analyze garbage collection problems you can enable verbose logging, which provides data on all garbage collection operations including initialization, stop-the-world processing, finalization, reference processing, and j9v failures.
Remove this option and try again. The J9 JVM became the runtime engine for many of IBMs Enterprise middleware products, where it has built its reputation for high performance, scalability, and reliability. Run the JVM on a system with a supported operating system. For security reasons this class must be found on the boot classpath.
Examples of configuration changes
The second parameter gives further information about the failure. Check your command line options to ensure that you have not placed boot classes on the application classpath. IBM continue to be actively involved j9vj the project and continue to put this Java VM at the core of many software offerings.
DTFJ works with data from a system dump or a Java dump. Ahead of Time AOT compilation is a mechanism for improving start up performance.
Ib, using this site, you agree to the Terms of Use and Privacy Policy. If you do want to use the -Xzero: Alternative policies are available, including those that cater for applications with large Java heaps -Xgcpolicy: OpenJ9 is also a component of Open Liberty. Java virtual machines comparison. This can happen when the JVM is started with incorrect options, giving rise to additional messages. Explanation The processor is not supported. Explanation The processor does not support the SSE2 instruction set.
Refer to the documentation for supported platforms bim GC policies.
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This warning message can be ignored if you do not want to use the -Xscdmx option. The JVM continues and ignores the -Xitsn option. Run the JVM without the -Xprotectcontiguous option. Correct or remove the command-line option and try again. Although igm techniques use more CPU and memory, the improved performance that is delivered by the optimizations can make the trade-off worthwhile. Change the user iibm handler so that the application does not continue when there is an unrecoverable condition on a Java thread.
The higher optimization levels use special techniques such as escape analysis and partial redundancy elimination, or loop through certain optimization sequences more times. Unlike other class data sharing CDS implementations, enabling the feature in OpenJ9 requires only one step: Contact your IBMM service representative if the problem continues.
This is unlikely to be a problem caused by starting the JVM. The option -Xscdmx is ignored.
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