I'm a newbie to JBoss and have a question nobody asked. I'm calling a setter method of my entity bean. Instead of only updating the corresponding table's column JBoss deletes/inserts a whole row in one transaction. Is it default JBoss behavior? Can I set some options in config files to change this behavior? If not what does 'tuned-updates' option in jaws.xml exactly mean? I use JBoss-2.4.4 and Hypersonic SQL database. Thank you in advance.