Oracle oas 10.1.3 oc4j java memory pools info...?

Question

Hello!
I need to find info about java memory in JVM. What is :
PS Eden Space
PS Old Gen
PS Perm Gen
PS Survivor Space
PS MarkSweep
PS Scavenge
regards - Marcin

Answer 1

user8672998 wrote:
Hello!
I need to find info about java memory in JVM. What is :
PS Eden Space
PS Old Gen
PS Perm Gen
PS Survivor Space
PS MarkSweep
PS Scavenge
regards - MarcinHi Marcin,
To monitor the java memory and to find info on the memory pools & GC parameters, you must first verify that you are running OC4J on JDK release 5.0, and than you must set the jmxremote property for the OC4J instance.
Using Application Server Control to Set the jmxremote System Property
To set the enable monitoring of JVM J2SE 5.0 metrics from Application Server Control:
1. Navigate to the OC4J Home page for the OC4J instance.
2. Click Administration to display the OC4J Administration page, which contains a table listing the various administration tasks you can perform for this OC4J instance.
3. If necessary, expand the Services section of the table by clicking the expand icon or by clicking Expand All.
4. Click the task icon in the Server Properties row of the table to display the OC4J Server Properties page.
5. Scroll down to the Command Line Options section of the page and select Enable J2SE 5.0 Platform MBeans.
6. Click Apply to apply the changes.
7. Navigate to the Cluster Topology page, select the OC4J instance, and then click Restart.
Manually Setting the jmxremote System Property
You can also enable monitoring of JVM J2SE 5.0 metrics manually, by including the following string as an OC4J runtime startup option:
com.sun.management.jmxremote
Refer the section "Setting System Properties at Startup" in the Oracle Containers for J2EE Configuration and Administration Guide for detailed instructions on how to specify OC4J runtime startup options.
Specifically, if you are running OC4J in a standalone environment, you must include the following argument to the OC4J java command:
java -Dcom.sun.management.jmxremote -jar oc4j.jar
Or, if you are running OC4J in a Oracle Application Server managed environment, you must include the following argument in the start-parameters java-options element in the opmn.xml file:
<ias-component id="OC4J">
<process-type id="home" module-id="OC4J" status="enabled">
<module-data>
<category id="start-parameters">
<data id="java-options" value="-Dcom.sun.management.jmxremote"/>
</category>
</module-data>
</process-type>
</ias-component>
Regards,
~Pointer