IZ73689: 64-BIT JAVA RUNS VERY SLOWLY WHEN JIT CODE CACHE IS FULL
Closed as program error.
Error Message: Running Java 5 or Java 6 on 64-bit platforms, the JVM's performance is very bad. Profiling shows that most of the CPU time is spent in the interpreter (j9vm26.dll or libj9vm26.so) rather than JIT-compiled code. If verbose JIT tracing is enabled via the -Xjit:verbose option, messages like this will be printed: . <WARNING: JIT CACHES FULL> . Stack Trace: N/A .
It may be possible to work around this issue using the unsupported option -Xjit:codeTotal=131072.
The problem is caused when the JIT code cache becomes full and all loaded classes are in use (and hence cannot be unloaded to free up memory). This tends to occur only on 64-bit platforms due to the larger volume of cached native code.
This defect will be fixed in: 6.0.0 SR8 5.0.0 SR12 . The JIT compiler has been updated to use a different code cache size threshold for 64-bit platforms. The code cache is grown dynamically so applications that do not require the space will not be impacted. . To obtain the fix: Install build 20100402 or later
Reported component name
JAVA 5 JIT
Reported component ID
Last modified date
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fixed component name
JAVA 5 JIT
Fixed component ID
Applicable component levels
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