Follow these steps to access the JVM Settings in the
WebSphere Application Server administrative console:
- On the left side of the WebSphere Application Server administrative
console, expand Nodes under WebSphere Administrative Domain.
- Expand node name.
- Expand Application Servers.
- Expand Default Server.
- Expand Process Definition.
- Click JVM Settings.
- JVM Settings is shown on the right side of the console.
You can configure these JVM settings:
- Classpath
The standard classpath in which the Java™ virtual machine looks for
classes. This property can contain multiple paths separated by colons (
: ) or semicolons ( ; ) depending on the operating system of
the node.
- Boot Classpath
Some JVMs contain an option to specify bootstrap classes and resources.
This property can contain multiple paths separated by colons ( : )
or semicolons ( ; )depending on the operating system of the
node.
- Verbose Mode Class
Enables verbose debugging output for class loading
- Verbose Mode Garbage Collection
Enables verbose debug output for garbage collection
- Verbose Mode JNI
Enables verbose debugging output for native method invocation
- Initial Heap Size
The initial heap size available to the JVM, in megabytes.
- Maximum Heap Size
The maximum heap size available to the JVM, in megabytes.
- Run HProf
Enable HProf profiler support. To use another profiler, use the command
line property to specify settings for the custom profiler.
- Hprof Arguments
Additional profiler arguments to use when Run HProf is used
- Debug Mode
Enables the JVM debug output
- Debug Arguments
When Debug Mode for the Java virtual machine is enabled, this property
allows additional debug arguments to be passed to the Java virtual
machine
- Disable JIT
Disables the Just In Time (JIT) compiler option of the JVM
For additional command line arguments for the JVM, edit server-cfg.xml
file. Adding command line arguments to Generic Command Line Arguments in
AdminConsole causes server startup failure.
- Edit the server-cfg.xml file found in WAS_HOME/config
directory.
- Search on command and find commandLineArgument="".
- In the empty quotes, add additional command line arguments for the
JVM.
- Recycle the Application Server.
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