Hi, I have tried different configs and watched the amount of Data transfered. I did it with CompressionMarshaller, Tomcat Connectors compress=force and none. I configured the compressionMarschaller for ejb3 in the /deploy/ejb3.deployer/META-INF/ jboss-service.xml like this: <mbean code="org.jboss.remoting.transport.Connector" | name="jboss.remoting:type=Connector,name=DefaultEjb3Connector,handler=ejb3"> | <depends>jboss.aop:service=AspectDeployer</depends> | <attribute name="Configuration"> | <config> | <invoker transport="servlet"> | <attribute name="serverBindAddress">${jboss.bind.address}</attribute> | <attribute name="serverBindPort">8080</attribute> | <attribute name="path">servlet-invoker/ServerInvokerServlet</attribute> | </invoker> | <handlers> | <handler subsystem="AOP">org.jboss.aspects.remoting.AOPRemotingInvocationHandler</handler> | </handlers> | <attribute name="dataType" isParam="true">serializable | </attribute> | <attribute name="marshaller" isParam="true">org.jboss.remoting.marshal.compress.CompressingMarshaller | </attribute> | <attribute name="unmarshaller" isParam="true">org.jboss.remoting.marshal.compress.CompressingUnMarshaller | </attribute> | </config> | </attribute> | </mbean> The results are not very representative since they are rather small, but none the less: | Config Receive KB Sent KB | CompressionMarshaller 497,28 69,81 | Http and CompMarshaller 485,31 69,81 | Http 483,33 58,11 | none 494,28 58,11 | I would plain the gap to the overhead in compression here, but as said, I dont get (see) any "gziped" Data on the wire when using the compressionMarshaller. Sincerely Marc View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4066732#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...