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From Anita Kulshreshtha <a_kuls...@yahoo.com>
Subject Re: How to get memory statistics from a remote Geronimo runtime?
Date Tue, 04 Dec 2007 15:27:16 GMT
   IIUC,
http://java.sun.com/j2se/1.5.0/docs/api/java/lang/management/MemoryMXBean.html
   runtime values are sum of values from Heap and non heap memory. In
other words you need to add contribution from non heap Memory to all 4
equations. 

Thanks
Anita

--- Vamsavardhana Reddy <c1vamsi1c@gmail.com> wrote:

> I don't know if it is necessary to add the statistics from Runtime. 
> Here is
> the relationship I see between the stats from Runtime and those got
> from
> MemoryMXBean.getHeapMemoryUsage()
> 
> Runtime.totalMemory() == MemoryUsage.getCommitted()
> Runtime.maxMemory() == MemoryUsage.getMax()
> Runtime.freeMemory() == MemoryUsage.getCommitted() -
> MemoryUsage.getUsed()
> Runtime.totalMemory() - Runtime.freeMemory() == MemoryUsage.getUsed()
> 
> ++Vamsi
> 
> 
> On Dec 4, 2007 6:51 PM, Anita Kulshreshtha <a_kulshre@yahoo.com>
> wrote:
> 
> >   If you are interested in usedMemory and maxMemory as given by
> > Runtime, we could add that again. The JVM Stats give a rough
> estimate
> > of heap memory only.
> >
> > Thanks
> > Anita
> >
> > --- Vamsavardhana Reddy <c1vamsi1c@gmail.com> wrote:
> >
> > > I am wondering if the following (which works) is the correct way
> to
> > > get
> > > maxHeapSize and usedMemory from a remote Geronimo server.
> > >
> > > import
> > > org.apache.geronimo.management.stats.BoundedRangeStatisticImpl;
> > >
> > >         Map map = new HashMap();
> > >         map.put("jmx.remote.credentials", new String[] {user,
> > > password});
> > >         JMXServiceURL address = new JMXServiceURL(
> > >                 "service:jmx:rmi:///jndi/rmi://"+host+ ":" + port
> +
> > > "/JMXConnector");
> > >         JMXConnector jmxConnector =
> > > JMXConnectorFactory.connect(address,
> > > map);
> > >         mbServerConnection =
> jmxConnector.getMBeanServerConnection();
> > >         objName = ObjectName.getInstance
> > > ("geronimo:J2EEServer=geronimo,name=JVM,j2eeType=JVM");
> > >         Stats stats = (Stats)
> > > mbServerConnection.getAttribute(objName,
> > > "stats");
> > >          BoundedRangeStatisticImpl statistic =
> > > (BoundedRangeStatisticImpl)
> > > stats.getStatistic("HeapSize");
> > >         long maxMemory = statistic.getUpperBound();
> > >         long usedMemory = statistic.getCurrent();
> > >
> > > Is this ok?  Or, is there a better way?
> > >
> > > ++Vamsi
> > >
> >
> >
> >
> >
> > 
>
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