[jboss-user] [Performance Tuning] - PermGen with -server option

Hello all. I have quite a trouble with JVM/JBoss: We're developing a multimodule web application. Modified wars (=modules) are sent from continuous integration server to our development JBoss many times a day - this redeploys modified WAR. The same for clients - we'd like to redeploy single modules without restarting the server. Unfortunately after few redeploys we get PermGen space. Server is useless and must be restarted. 1) When JVM started with -client option I can avoid PermGen space, but from time to time (~1/10 redeploys), I get this: Cause: Class 'org.richfaces.renderkit.html.SuggestionBoxRenderer' is missing a runtime dependency: java.lang.NoClassDefFoundError: org/ajax4jsf/renderkit/compiler/ElementBase$1 | at com.sun.faces.config.ConfigManager.initialize(ConfigManager.java:213) | at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:196) | at org.jboss.web.jsf.integration.config.JBossJSFConfigureListener.contextInitialized(JBossJSFConfigureListener.java:69) | I need to restart redeploy. After few redeploys this error repeats. A bug in JVM or JBoss, or do I need to add some magical command line options for JVM? 2) With -server option I still have PermGen space, because JVM doesn't call finalize() methods on objects. Finalization queue is big. Is there any JVM option for enabling finalization in -server mode (except manual calling System.runFinalization()), or this is a bug in JVM? 3) According to -XX:+TraceClassUnloading, JVM unloads unused classes only when PermGen memory is full. Lots of unused classes from WEB-INF/lib are kept in memory for long time. Couldn't this unloading be done earlier? Any ideas? My JVM version is 1.6.0_10, JBoss 4.2.2.GA. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4189786#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...