Quick example, showing what state is in RAM and in the persistent store after each step of a 6 step process: 1) Insert /A 2) Insert /B 3) Eviction thread runs, evicts /A 4) Read /A 5) Eviction thread runs, evicts /B 6) Remove /B Passivation=false 1) RAM: /A Disk: /A 2) RAM: /A, /B Disk: /A, /B 3) RAM: /B Disk: /A, /B 4) RAM: /A, /B Disk: /A, /B 5) RAM: /A Disk: /A, /B 6) RAM: /A Disk: /A Passivation=true 1) RAM: /A Disk: 2) RAM: /A, /B Disk: 3) RAM: /B Disk: /A 4) RAM: /A, /B Disk: 5) RAM: /A Disk: /B 6) RAM: /A Disk: View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4077555#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...