-XX:HitachiExplicitMemoryLogLevel (Option for specifying the log output level of the Explicit Memory Management functionality)
- Organization of this page
Format
-XX:HitachiExplicitMemoryLogLevel:applicable-range
Description
Specify the event log level of the Explicit Memory Management functionality.
- Default value
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-XX:HitachiExplicitMemoryLogLevel:none
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- Prerequisite options
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-XX:+HitachiUseExplicitMemory
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Argument
- applicable-range
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- none
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The event log of the Explicit Memory Management functionality is not output.
- normal
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Specified during normal operations. Outputs the status of Explicit heap at regular intervals (for each GC). Also, outputs the status when there are events where status of Explicit heap has large variations.
- verbose
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In addition to the contents for normal, the log is output for events when the Explicit heap status changes. The amount of log is more than that for normal.
- debug
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In addition to the contents for verbose, detailed information for the occurrence of some events is output. Since the amount of log is large, the performance deteriorates remarkably.
Precautions
If you specify the value other than none, normal, verbose, or debug, the following message is output in the standard output and the JavaVM is terminated with return code 1:
Invalid explicit heap log level: -XX:HitachiExplicitMemoryLogLevel:applicable-range Could not create the Java virtual machine.(log levels: none normal verbose debug)