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Field / Description
Tuning Formula or Default Value
(Default value is provided if there is no
tuning formula)
Enable Heap Dump on Sigquit/Ctrl-break
Note: This field is not supported in the 1.6
version of the Sun JDK. It will display if you
are using the IBM JDK.Select True from the
drop-down list if you want to request a
heapdump for the server JVM using Sigquit
command or pressing Ctrl+Break for server
JVM.
By default, the dump file is generated from
where the JVM was started (the
install_dir/bin directory).
If you select False from the drop-down list,
heapdumps are not generated if you run
Sigquit command or press Ctrl+Break.
tuning.properties Property:
ENABLE_HEAP_DUMP_SGTQCRTLBRK
Default value: True
Enable VerboseGC
Select True from the drop-down list if you
want to generate verbose garbage collection
data for server JVM.
JVM Verbose garbage collection (GC)
statistics are critical. It is recommended to
enable verbose garbage collection when you
are debugging your instance. These statistics
can be used to understand the behavior of
the JVM heap management and the
efficiency of the JVM.
If you select False from the drop-down list,
verbose garbage collection will be disabled.
tuning.properties Property:
ENABLE_VERBOSE_GC
Default value: False
JVM Arguments Prefix
Determines the arguments set as JVM
parameters before other JVM flags are set for
server JVM.
Ensure that you enter correct values in this
field. Else, the server JVM might fail to start.
For example, -XX:SurvivorRatio parameter
optimizes the object creation and object
preservation ratio.
tuning.properties Property:
JVM_ARGS_PREFIX
Default value: BLANK
Performance Management 137