You must perform batch server settings, if you want to use garbage collection control functionality.

You implement the batch server settings in the Easy Setup definition file. You specify the definition of the garbage collection control functionality in the <configuration> tag of a logical J2EE server (j2ee-server) of the Easy Setup definition file. The parameter to be specified is as follows:

• ejbserver.batch.gc.watch.threshold
  You specify threshold for memory usage, which is the condition for executing garbage collection.
  

For details on the Easy Setup definition file and parameters, see 4.6 Easy Setup definition file in the uCosminexus Application Server Definition Reference Guide.