(Please read before asking a question)
java -Xms34m -DnoBanner=1 Norm
java -Xms34m -Xmx96m Norm
If users use other database, such as MySql or Oracle, the minimum required memory is 16 Mb (which is minimum requirment to run Java).
Lvg2003 is a better software in terms of performance considering the more complicate features and thorough information it carries. Please refer to performance test for details.