Modifying Service, Manager, or Application Properties 
This procedure enables you to change the properties of a particular service, manager, or application. You can perform these actions in the Config Tool.
When you select a service, manager or an application, its relevant property keys and values are displayed in a table on the right.
The properties in the template configuration are divided into two sections:
Default property data
Displays default template configuration settings for a manager or service. These settings cannot be changed.
Custom property data
If you want to add custom values to the default vales of the properties, they are displayed in the Custom property data. These settings are valid for all instances. But if you set a property value in the template configuration, and then set another value for the same property in the same manager or service in a particular instance, then the new value is valid.
NoteThe instance configuration has priority over the template configuration.
End of the note.
The properties in an instance configuration are divided into two sections:
Inherited property data
Displays the template default value of a specific property. If there is a template custom value, then it is displayed. Otherwise, the template default value is displayed.
Custom property data
All custom settings for a specific instance are displayed in this area.
The properties can be defined with additional parameters, such as type, range, computed, parameterized, and link.
More information: Basic Features of the Config Tool.
Prerequisites
Start the Config Tool by double-clicking the configtool script file in <SAP_install_dir>/<system_name>/<instance_name>/j2ee/configtool directory.
Procedure
Setting a Template Custom Value for All Instances
Open the template configuration and select a service, manager or application.
Select the property from the table that is displayed.
In Custom value, enter a new value.
Choose Set Custom Value.
Choose
(Apply Changes).
Setting a Custom Value for a Specific Instance
Open an instance and select a service, manager or application.
Select the property.
In Custom value, enter a new value.
Choose Set Custom Value.
Choose
(Apply Changes).
Restoring to Default Value
Choose the template or an instance.
Select the property whose value you want to restore.
Choose Restore to Default Value or Restore to Inherited Value, respectively.
The custom value is restored to its default value.
Searching for Properties
To find a particular property, choose
(Properties Search).Enter the name of the property. Part of the name is a valid string.
Choose Start.
On the Results pane, all the properties containing the string appear. Each result line also displays the path and the values of the property.
To locate the property in Config Tool, select the relevant result line.
Choose GO.
More Information
You can also view and modify properties during runtime in the SAP NetWeaver Administrator.
More information: Java System Properties