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Changing OACORE java heap size in Oracle E-Business Suite R12.2.x

Author: Shakeeb Petkar | Category: Concepts, EBS 12.2.x, Troubleshooting5 comments | Tags: , , , , , , , , , , ,

Increasing oacore memory in EBS 12.2.x



Login to the Weblogic Console
http://hostname:port/console

 

Enter Username and Password.



Go to the below section.

Category: Domain Configurations
Sub Category: Environment > click the link "Servers"


Click > oacore_server1


Click Server Start ("Sub Tab")


Click Lock & Edit


Go to Arguments


Typical entries are like this:


-XX:PermSize=128m -XX:MaxPermSize=384m -Xms512m -Xmx512m -Djava.security.policy=/u02/oracle/ERPUPG/fs2/FMW_Home/wlserver_10.3/server/lib/weblogic.policy

 
Change To:


-XX:PermSize=128m -XX:MaxPermSize=384m -Xms1024m -Xmx2048m -Djava.security.policy=/u02/oracle/ERPUPG/fs2/FMW_Home/wlserver_10.3/server/lib/weblogic.policy

 

Before:



After:



Click the 'Save' button to save the configuration changes.


Once the customizations are complete and saved, click the 'Activate Changes' button in the 'Change Center' panel to activate the changes.



All changes have been activated.


No need for changing the values in the $CONTEXT_FILE of the application tier.
No need to bring down any services.

Comments

  1. Praveen Kamtala says:
    September 6, 2017 at 11:45 am

    Hi Shakeeb,

    Thanks for posting such good stuff!

    Can you clear my doubt regarding the following:

    1) When the application is running, from where will it take the value: $CONTEXT_FILE or WLS ?

    2) In the future if autoconfig is run on the application tier, will the values in weblogic be replaced by the one in the context file or the context file will get updated with the values in the weblogic console.

    1. Shakeeb Petkar says:
      September 7, 2017 at 11:51 am

      Praveen,

      In EBS 12.2+ releases, JVMs are run in Weblogic OACORE managed servers. These OACORE managed servers are started when Weblogic is started and the parameters it uses to start a managed server are configured in the Weblogic console for each managed server.
      Therefore, the values used will be read from the values entered in the console for the JVM start parameters.

      Hope this makes it clear!

      Keep following!!!

      Regards,
      Shakeeb

  2. Praveen Kamtala says:
    September 10, 2017 at 1:58 pm

    Hi Shakeeb,

    Nicely explained in a simple manner.

    Thanks for the efforts!!!

    Best Regards,
    Praveen Kamtala

  3. Anuja says:
    November 14, 2017 at 9:16 pm

    In the last line, you clearly mentioned that no restarts required.

    Without restarting the managed servers how managed servers will take the new values which we modified as arguments..

    1. Shakeeb Petkar says:
      November 23, 2017 at 1:45 pm

      It is dynamic.
      Once you save and then activate the changes, the arguments get modified.
      You can log out of the Weblogic Console and then login again to check if the values persists.

      Thanks!

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