How to track down High CPU Thread with ps, top and the new JDK7 jcmd Tool In Weblogic

Track down High CPU Thread with ps, top and the new JDK7 jcmd Tool In Weblogic :

Step1 : Login to the weblogic server

                Find out the java process which is running for weblogic with “ps command”

   Eg : ps –ef | grep java

you will see a java process with id 6439

Here the java process id is 6439

 Step 2: To display all the threads with this java process use the “ top” command as below

 Eg: top  -H –p 6439

Here we can see the thread ID 6474 is consuming the max cpu in the thread list. Lets us convert the value to hexadecimal value

Use the following  syntax to convert the value

Printf “%x \n” 6474

Hexavaule is : 194a

Set the environment for JDK 7

/domain/testdomain/bin/> . ./setDomain.sh

Start the jmcd by typing : jcmd

Now take the thread dump of the java process 

 jcmd 6439 help 

Now open the thread dump and search for the hexadecimal value of max threaded. You will see the status of the thread and code with is causing the issue.