NonStop Server for Java Programmer's Reference (NSJ 4.0+)

Managing Generation Size
Several java command options allow you to manage the initial size and maximum size of the combined
young and tenured generations.
-Xms
Sets the initial size for the combined young and tenured generation. The default initial size is
3058 kilobyte (K).
-Xmx
Sets the maximum size for the combined young and tenured generation. The default maximum size is
64 megabytes (MB).
-XX:MaxPermSize
Sets the maximum size for the permanent generation. The default value for MaxPermSize is 32 MB.
The initial size of the permanent generation is ignored.
Note: At initialization time, the maximum size of the combined young and tenured generations
(64 MB) and the maximum size of permanent generation (32 MB) are allocated. However, for
the young and tenured generations, the Java VM starts with the initial size and gradually
increases to the maximum size as needed.
Implementation of Garbage Collector Types
The default garbage collectors in NonStop Server for Java 4 are
Copying collector for the young generation●
Mark-sweep collector for the tenured generation●
NonStop Server for Java 4 uses these garbage collectors because they are the most efficient on the