Work with web server JVM system properties files

We can use properties files to create, modify, or delete web server JVM (JVM) system custom properties.

Determine the changes to make to the JVM system configuration.

From the server profile bin directory, run wsadmin -lang jython

Using a properties file, we can create, modify, or delete JVM system custom properties.

Run administrative commands using wsadmin to change a properties file for a JVM system, validate the properties, and apply them to the configuration.

Action	Procedure
create	Not applicable
modify	Edit properties and then run the applyConfigProperties command to modify the value of an existing custom property.
delete	Not applicable
create Property	Set properties and then run the applyConfigProperties command to create a custom property.
delete Property	Specify the properties to delete in the properties file and then run the deleteConfigProperties command to delete an existing custom property. The properties file must contain only the properties to be deleted.

Optionally, we can use interactive mode with the commands:

AdminTask.command_name('-interactive')

• Create web server JVM system properties.

  1. Specify JavaVirtualMachine custom properties in a properties file.

     Open an editor and specify JVM system properties in a properties file. We can copy the following example properties into an editor and modify the properties as needed for the situation. To specify a custom property, edit the AttributeInfo value and properties values.

     #
     # Header
     #
     ResourceType=JavaVirtualMachine
     ImplementingResourceType=Server
     ResourceId=Cell=!{cellName}:Node=!{nodeName}:Server=!{serverName}:JavaProcessDef=:JavaVirtualMachine=
     AttributeInfo=systemProperties(name,value)
      #
     #Properties
     #
     existingProp=newValue
     newProp=value
      #
     EnvironmentVariablesSection
     #
     #
     #Environment Variables
     cellName=myNode04Cell
     nodeName=myNode04
     serverName=IHS

  2. Run the applyConfigProperties command to create a JavaVirtualMachine configuration.

     Running the applyConfigProperties command applies the properties file to the configuration. In this Jython example, the optional -reportFileName parameter produces a report named report.txt:

     AdminTask.applyConfigProperties(['-propertiesFileName myObjectType.props -reportFileName report.txt'])

• Modify existing web server JVM system properties.

  1. Obtain a properties file for the JVM system to change.

     We can extract a properties file for a JavaVirtualMachine using the extractConfigProperties command.

  2. Open the properties file in an editor and change the custom properties as needed.

     Ensure that the environment variables in the properties file match the system.

  3. Run the applyConfigProperties command.

• Delete the JVM system properties.

  To delete one or more properties, specify only those properties to delete in the properties file and run deleteConfigProperties.

  AdminTask.deleteConfigProperties('[-propertiesFileName myObjectType.props -reportFileName report.txt]')

Results

We can use the properties file to configure and manage the JVM system properties.

What to do next

Save the changes to the configuration.

Related tasks

Extracting properties files

Create server, cluster, application, or authorization group objects using properties files and wsadmin scripting

Delete server, cluster, application, or authorization group objects using properties files

PropertiesBasedConfiguration (AdminTask)