7 Replies Latest reply on Mar 31, 2008 4:52 AM by vijayneema

How to know CURRENT HEAP SIZE USED, FREE HEAP SPACE, TOTAL H

vijayneema Mar 28, 2008 9:25 AM

I have recently migrated from weblogic to JBoss. I use to have a monitoring tool to show me the current status of memory (size, used, available) in Weblogic. Now since I am using JBoss, I have to update my code to fetch these information from JBoss programatically.

Can anyone help me get these information from any API of JBoss.

1. Re: How to know CURRENT HEAP SIZE USED, FREE HEAP SPACE, TOT

mazz Mar 28, 2008 9:31 AM (in response to vijayneema)

Keep your eye on http://www.rhq-project.org - the RHQ Middleware Management Tool. No JBossAS plugin is out in the open yet, but a) you can write your own or b) wait and see if the community produces one.
Actions
2. Re: How to know CURRENT HEAP SIZE USED, FREE HEAP SPACE, TOT

dimitris Mar 28, 2008 9:34 AM (in response to vijayneema)

http://wiki.jboss.org/wiki/Wiki.jsp?page=UseJDK5JConsole
Actions
3. Re: How to know CURRENT HEAP SIZE USED, FREE HEAP SPACE, TOT

mazz Mar 28, 2008 9:35 AM (in response to vijayneema)

Oh, but you can use the RHQ JMX plugin - you should be able to import your platform and connect to your JBossAS app server as a "JMX Server" and monitor it that way. I haven't tried that but it may work if you are looking for something now.
Actions
4. Re: How to know CURRENT HEAP SIZE USED, FREE HEAP SPACE, TOT

mazz Mar 28, 2008 9:55 AM (in response to vijayneema)

And yet another possibility is purchase JBoss ON - our 2.0 is currently in beta to be released in several weeks. See our short demo at https://network.jboss.com/confluence/display/JON2/Demo-Intro
Actions
5. Re: How to know CURRENT HEAP SIZE USED, FREE HEAP SPACE, TOT

csaldanh Mar 28, 2008 1:07 PM (in response to vijayneema)

Doesn't this MBean give all the information such as memory used , total memory etc.

jboss.system:type=ServerInfo

You could use the jmx-console to access the information of this mbean.
Actions
6. Re: How to know CURRENT HEAP SIZE USED, FREE HEAP SPACE, TOT

dimitris Mar 28, 2008 1:13 PM (in response to vijayneema)

http://wiki.jboss.org/wiki/Wiki.jsp?page=HowCanIDisplayTheMemoryPoolUsage
Actions

7. Re: How to know CURRENT HEAP SIZE USED, FREE HEAP SPACE, TOT

vijayneema Mar 31, 2008 4:52 AM (in response to vijayneema)

Thanks everyone!!

For your better understanding, here is the code I am using with weblogic to fetch the required information:

import weblogic.jndi.Environment;
import weblogic.management.MBeanHome;
import weblogic.management.runtime.JVMRuntimeMBean;

Environment env = new Environment();
env.setProviderUrl("t3://weblogicbox:1111");
env.setSecurityPrincipal("abcd");
env.setSecurityCredentials("abcd");
Context ctx = env.getInitialContext();
home = (MBeanHome) ctx.lookup(MBeanHome.ADMIN_JNDI_NAME);

JVMRuntimeMBean serverRuntime = (JVMRuntimeMBean) home.getRuntimeMBean(serverName, "JVMRuntime");
System.out.println((serverRuntime.getHeapSizeCurrent()-serverRuntime.getHeapFreeCurrent())/1024);

Note that this program is running on a different box & fetching information from a different box running weblogic.

Thanks a lot

Go to original post