Michal Glowacki [http://community.jboss.org/people/mglowacki] created the discussion "Is there a way to solve this without cluster?" To view the discussion, visit: http://community.jboss.org/message/632711#632711 -------------------------------------------------------------- I have a very powerful machine, with 80 cores and 32GB RAM, but when there is a traffic peak, it goes down. It hosts Apacje/JBoss/Postgres with deployed Seam web applications and EJB 3 for app. logic. In thread dumps I see a lot of: Thread: ajp-0.0.0.0-8009-14 : priority:5, demon:true, threadId:115, threadState:BLOCKED - waiting on 0x7406ce55 (a java.util.WeakHashMap) org.jboss.naming.ENCFactory.getObjectInstance(ENCFactory.java:114) and Thread: ajp-0.0.0.0-8009-2 : priority:5, demon:true, threadId:103, threadState:BLOCKED - waiting on 0x672e12af (a java.util.HashMap) org.jboss.metadata.web.jboss.JBossWebMetaData.getRunAsIdentity(JBossWebMetaData.java:839) and Thread: ajp-0.0.0.0-8009-14 : priority:5, demon:true, threadId:115, threadState:BLOCKED - waiting on 0x7406ce55 (a java.util.WeakHashMap) org.jboss.naming.ENCFactory.getObjectInstance(ENCFactory.java:114) As I understand, there is too many invocations of methods trying to access naming service. In Tomcat, I have set maxthreads on 8009 connector to 1200, however the dumps shows the problems starts when it's over 600-700. I believe that setting up cluster should help, as the traffic will be distributed to several jboss instances. However, as I afraid cluster like a fire - is there anything more I can do? Regards, Michal -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/632711#632711] Start a new discussion in Performance Tuning at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]