I have a very dynamic cache, we cache mq requests by a region and a subregion. There are a finite amount of possible subregions numbering in the thousands, and each element placed in the subregion expires after 30 minutes. I was just concerned because if for example all of the elements in a subregion have expired, the subregion node itself will sit there forever. I know one option is to have the subregion expire as well, but I don't want the elements inside to expire before their 30 minutes are up so i dont think thats an option. Do you think this is a potential memory concern having these empty nodes sit around? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4166242#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...