When you upgrade from a previous version of the application server, transfer of the previous configuration is required. Since the target configuration files may have new parameters and new preconfigured features, copying the old configuration files to the new server installation is not possible. The values of the old configurations must be transferred to the Enterprise Server configuration format.
The following JVM options are not transferred from the source to the target installation:
Dcom.sun.aas.configRoot 8. Xmx<...>m
The options that are not transferred are listed down in the upgrade log. The user can manually change such attributes in the configuration file.