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Editorial Team
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Asked: 2026-06-07T11:04:08+00:00

I would like to attach to a WebSphere JVM and obtain useful data like

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I would like to attach to a WebSphere JVM and obtain useful data like garbage collectors’ names and their collection counts, thread counts, heap/non-heap memory usage, JVM uptime etc. However, this link gives the list of MBeans available with the WebSphere JVM –

http://pic.dhe.ibm.com/infocenter/wasinfo/v6r1/index.jsp?topic=%2Fcom.ibm.websphere.javadoc.wsfep.doc%2Fweb%2FmbeanDocs%2Findex.html

These MBeans don’t seem to offer any data that I require. Is there any other way to obtain the data? I shall be using JMX to gather it.

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  1. Editorial Team

    If you’re a corporate with bucks to spend I would suggest a product like Wily Introscope which runs an agent along with your JVM to collect all the metrics that you are after. I have used it with Websphere servers. Searching for an Open Source alternative I came across GlassBox which may provide a low cost alternative for you.

    I’m not aware of any default MBeans that will provide the coverage you’re after. It’s typically the big Java vendors that provide this type of functionality.

    [Update]

    Having done something recently using VisualVM with Websphere 7, for the purposes of real-time monitoring/troubleshooting, I thought I would share my knowledge. VisualVM comes with the standard Sun JDK and you will find it installed here: JAVA_HOME\bin\jvisualvm.exe

    To enable the JRE in Websphere to allow VisualVM to connect you must add the following JVM parameters using the Websphere Admin Console

    Go To: Application Servers > [server_name] > Java and Process Management > Process definition > Java Virtual Machine > Generic JVM arguments 

    -Djavax.management.builder.initial= 
-Dcom.sun.management.jmxremote 
-Dcom.sun.management.jmxremote.authenticate=false 
-Dcom.sun.management.jmxremote.ssl=false 
-Dcom.sun.management.jmxremote.port=1099 
-Dcom.sun.management.jmxremote.local.only=false

    Make sure that the port number you have chosen above is not already in use

    netstat -ap | grep 1099

    Restart the server and you will be able to connect using VisualVM to see Uptime, Threads, Heap and GC profiles.

    I see that Sun have also documented how you can write your own Java JMX client to read these values.

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