Sun GlassFish Enterprise Server v3 Release Notes

No Support for Client VM on Windows AMD64

By default, Enterprise Server uses Client VM to achieve best startup and deployment performance. If you are using Windows AMD64, edit the domain.xml file to remove the line <jvm-options>–client<jvm-options>. In this case, JVM ergonomics chooses the appropriate kind of VM for the given platform.

For more information about platform support, see Ergonomics in the 5.0 Java Virtual Machine.