I'm using: CacheMode=REPL_SYNC IsolationLevel=READ_COMMITTED LockParentForChildInsertRemove=false StateRetrievalTimeout=20000 SyncReplTimeout=20000= LockAcquisitionTimeout=15000 I put each of my object into a Fqn. So the ROOT has 1,000,000 direct children. jdk: 1.6.0_07 OS: RHEL 5.1 on 8 cores Xeon all my nodes are on the same subnet (and same switch). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4166030#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...