We are in the process of upgrading from 4.0.4 to eap 4.3. I was reading the datasheet for eap 4.3, and it suggests 512mb ram as a minimum system requirement. I was wondering if this refers to half a gig of overall actual memory on the physical server or the amount of process space available to the app server. Also, on the wiki, I have come across this formula to calculate process space: TotalProcessSpace = .5GB(java overhead) + Heap + (Threads*ThreadStackSize) http://www.jboss.org/community/docs/DOC-11564 Is it suggesting that the overhead for jvm operations may take up half a gig of ram outside of the heap and stack memory allocated? Thanks in advance. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4199938#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...