If I want to search the task instance and process instance by the business variables, but I worry about the performance of searching the VariableInstances table by the business variables. You advise I have to store very limited amounts of my domain model, but the process instance become more and more, then the VariableInstance table's size will be bigger. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4097683#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...