How to Increase Java Heap Size through Java Code. Increase inside Code?

Hi All,
I am using a third party tool. When i run a particular program it says OutOfMemory error. I like to increase heap size through Java Code before calling the particular Java application or Code..
Is there is any way to set the Heap Size through Java Code in run time ???
Pls Kindly help.
Thanks.

if you start the program with a -Xmx512m flag, the virtual machine gets half a gigabyte of memory to use (or that's the max it's allowed to use). All things run in the same virtual machine will have the same limit, third party tools run in the same virtual machine can't "not care about this" unless they're throwing OOMs themselves for some stupid reason.

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How to set the Heap size for JAVA

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increase the heap size ?
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Thank you.

How to determine the program must handled with increase heap size ?
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Im writing a java programme for loading the german dictionary. my dictionary is very huge(around 300000+ words).
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I found one solution to increase the heap size, but i want to increase the heap size in java programmer itself, not outside jar file. so i could not use "-Xms64m" option of jvm.
Can anyone tell me how can i do this

sunlover1984 wrote:
Im writing a java programme for loading the german dictionary. my dictionary is very huge(around 300000+ words).
while loading the dictioanry im getting error "OutOfMemoryError" .
I found one solution to increase the heap size, but i want to increase the heap size in java programmer itself, not outside jar file. so i could not use "-Xms64m" option of jvm.
Can anyone tell me how can i do thisThat option is a startup option for the JVM. That means if your jar is already loaded then you are already too late to try and call it.

How To Increase heap size in Java Studio Creator 2

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How to increase the Java Heap size ?

Hi
I am new to java. I have created a java application and i configured in Eclipse. While running my application it throws an error that
"Exception in thread "Thread-21" java.lang.OutOfMemoryError: Java heap space"
i have used threads in my application. Then i searched some forums regarding this. The answer i got is "Increase the java heap size" using
"java -Xms64m -Xmx256m prog" in command prompt. while running.
But i am not running my application in command prompt. I used Eclipse to run my application. Here my ultimate question is how to set the heap size while running the application in Eclipse and where to set in Eclipse.
Kindly help me.
Regards
Ramesh E

i have used 20 threads to extract the datas
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try{
extrThreads[i] = new Thread(this);
extrThreads.start();
}catch (Exception e) {
System.out.println(e);
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Setting heap size through oracleAS 10.1.3 enterprise manager

Hi All,
Can any body pls tell me how we can set java heap size through oracleAS 10.1.3 enterprise manager
Best Regards
Girish Tandel

hi...
Yes, we can set the heap size in opmn.xml file in java-options.... But this is not the good practice to mannualy edit server xml files. In OracleAS 10.1.2 we can set the same through OEM. But i am not able to set using oem in oracleas 10.1.3
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Girish

How to increase Memory and Java Heap Size for Content Server

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My content server is processing requests very slowly. Over performance is not good. I have 2 GB of RAM any idea what files I can modify to increase the Java Heap Size for the Content Server. If I increase the RAM to 4 or 6 GB where do I need to make changes for the Java Heap Size and what are the recommended values. I just have Content Server Running on the linux box. Or how do I assign more memory to the user that owns the content server install.
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You might find these interesting:
http://blogs.oracle.com/fusionecm/2008/10/how_to_-javatuning.html
http://download.oracle.com/docs/cd/E10316_01/cs/cs_doc_10/documentation/admin/performance_tuning_10en.pdf
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https://metalink2.oracle.com/metalink/plsql/f?p=130:14:9940589543422282072::::p14_database_id,p14_docid,p14_show_header,p14_show_help,p14_black_frame,p14_font:NOT,788210.1,1,1,1,helvetica
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How do we monitor Java heap size

How do we monitor Java heap size? Is there any way to check whether we are exceeding the heap size or not?
Regards,
N.S

Hi,
> How do we monitor Java heap size? Is there any way to
> check whether we are exceeding the heap size or not?
>
You should run your JAVA AS with the recommended settings described in the note
"Java VM settings for J2EE 6.30/6.40/7.0"
SAP Note Number: 723909.
If you do so, you can find the garbage collector log messages in your dev_server* or your std_server*.out file.
You can also use the option -Xloggc:<file> to log to a seperate file.
You can visualize the GC log file with a tool like GCViewer.
See
http://www.javaperformancetuning.com/tools/gcviewer/index.shtml
for an overview of this tool.
Regards,
Markus

How to increase the heap size of the container in whioch BPEL is running ?

Hi All,
I recently raised an SR they have asked me to do the following,
Can you please try and start the container running the BPEL process with max
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the option -XX:+AggressiveHeap set. (even though this option is recommended for
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Hi Deepak I cant see any attribute or element in the oc4j_opmn.xml file regarding heap memory. In the server properties I changed the size of heap memeory how can I rollback.
I am getting the following error
Configuration information
Running in C:\product\10.1.3.1\OracleAS_1
Operation mode:Startup, App Server, No Enterprise Manager, Single Instance
Oracle home:C:\product\10.1.3.1\OracleAS_1
Oracle home name:Unnamed
Instance name:SOA.01hw117905.India.TCS.com
Instance type:allProducts
Version:10.1.3.4.0
Uses infrastructure:false
Not an infrastructure instance, no infrastructure information available
Components:[j2ee, apache, orabpel, oraesb, owsm, Wsil]
2009-08-19 09:08:51.863--Begin log output for Mid-tier services (SOA.01hw117905.India.TCS.com)
2009-08-19 09:08:51.863--Processing Step: starting OPMN
2009-08-19 09:09:00.394--Processing Step: starting OPMN managed processes
2009-08-19 09:09:35.19--End log output for Mid-tier services (SOA.01hw117905.India.TCS.com)
An unknown OPMN error has occured
oracle.appserver.startupconsole.model.ConsoleException: An unknown OPMN error has occured
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     at oracle.appserver.startupconsole.control.Controller.start(Controller.java:69)
     at oracle.appserver.startupconsole.control.GroupController.doStart(GroupController.java:47)
     at oracle.appserver.startupconsole.control.Controller.start(Controller.java:69)
     at oracle.appserver.startupconsole.view.controller.ControllerAdapter.start(ControllerAdapter.java:30)
     at oracle.appserver.startupconsole.view.controller.MasterControlAdapter.run(MasterControlAdapter.java:94)
     at oracle.appserver.startupconsole.view.Runner.main(Runner.java:39)
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     at oracle.ias.opmn.optic.AbstractOpmnEntity.start(AbstractOpmnEntity.java:110)
     at oracle.appserver.startupconsole.control.OPMNController.doStart(OPMNController.java:89)
     ... 6 more
Exception caused by
Error from opmn during process control operation
oracle.ias.opmn.optic.OpticControlException: Error from opmn during process control operation
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     at oracle.appserver.startupconsole.control.Controller.start(Controller.java:69)
     at oracle.appserver.startupconsole.control.GroupController.doStart(GroupController.java:47)
     at oracle.appserver.startupconsole.control.Controller.start(Controller.java:69)
     at oracle.appserver.startupconsole.view.controller.ControllerAdapter.start(ControllerAdapter.java:30)
     at oracle.appserver.startupconsole.view.controller.MasterControlAdapter.run(MasterControlAdapter.java:94)
     at oracle.appserver.startupconsole.view.Runner.main(Runner.java:39)
<?xml version='1.0' encoding='WINDOWS-1252'?>
<response>
<msg code="-82" text="Remote request with weak authentication.">
</msg>
<opmn id="01hw117905:6200" http-status="206" http-response="2 of 3 processes started.">
<ias-instance id="SOA.01hw117905.India.TCS.com">
<ias-component id="default_group">
<process-type id="home">
<process-set id="default_group">
<process id="172" pid="2176" status="Alive" index="1" log="C:\product\10.1.3.1\OracleAS_1\opmn\logs\\default_group~home~default_group~1.log" operation="request" result="success">
<msg code="0" text="">
</msg>
</process>
</process-set>
</process-type>
<process-type id="oc4j_soa">
<process-set id="default_group">
<process id="173" pid="5556" status="Stopped" index="1" log="C:\product\10.1.3.1\OracleAS_1\opmn\logs\\default_group~oc4j_soa~default_group~1.log" operation="request" result="failure">
<msg code="-21" text="failed to start a managed process after the maximum retry limit">
</msg>
</process>
</process-set>
</process-type>
</ias-component>
<ias-component id="HTTP_Server">
<process-type id="HTTP_Server">
<process-set id="HTTP_Server">
<process id="171" pid="2724" status="Alive" index="1" log="C:\product\10.1.3.1\OracleAS_1\opmn\logs\\HTTP_Server~1.log" operation="request" result="success">
<msg code="0" text="">
</msg>
</process>
</process-set>
</process-type>
</ias-component>
</ias-instance>
</opmn>
</response>

Extending java heap size

hi,
In message mapping iam importing the ED for target field at that time it tells java heap size is extended. so using repository.jnlp
i extended the memory.
But still i can't upload the ED.
could u plz suggest wht to do in that..
it is urgent plz do needful...
regards
sasi

Hi Sk
follow these link to understand java heaap and its solution for extending size
Java heap: Java objects belonging to a VM are stored on the Java heap. Each VM has its own Java heap, and other VMs cannot access them.
Memory Management in the VM Container
http://help.sap.com/saphelp_nw04s/helpdata/en/3b/88d863ff72456aa61e993831a76614/frameset.htm
Note 667841 - J2EE Engine 6.20 on AIX: how to increase the heap size
https://websmp130.sap-ag.de/sap(bD1lbiZjPTAwMQ==)/bc/bsp/spn/sapnotes/index2.htm?numm=667841
Note 667711 - Max. JVM Heap Size for AIX JDK 1.3.1
https://websmp130.sap-ag.de/sap(bD1lbiZjPTAwMQ==)/bc/bsp/spn/sapnotes/index2.htm?numm=667711
Regards
sandeep
if helpful reward points

8.2 EPPM Application Server Java Heap Size

Hello I am reading the sizing guide is there a way to calculate the Java Heap Size required? The guide suggest 8GB was wondering if anyone has any experience and how much java heap size are you using?

JVM configuration is largely based on the load on the server. You can start with as little as 2GB and based on the load, you can increase it. Other factors that you need to consider is the number of CPU, RAM, Swap space etc.
Sachin Gupta

Plz can you help me. How to increase the Heap Size!!!!!!!!!!!

Hi,
i'm new to 10g appl server
Failed to deploy web application "AGXI51". Failed to deploy web application "AGXI51". . The evaluate phase failed. The Adapter used in the evaluate may have thrown an exception.
Resolution:
Please call Oracle support.
Base Exception:
java.lang.OutOfMemoryError
null. java.lang.OutOfMemoryError
i'm getting this Error while deploying the application.So wat is the procedure to increase the Heap Size
Regards,
Niranjan.D

Locate opmn.xml on your instance. In file locate section relevant for container you use (i.e. "home"). In next line you can see tags where startup parameters are set. You should add following parameters (this will set heap size on 512Mb)
-Xms512m -Xmx512m
For detailed explanation I would recommend you to check following link:
http://download-uk.oracle.com/docs/cd/B25221_03/web.1013/b14431/troublesht.htm
Hope this help.

Java heap size error Work manager

Hi,
We are working with Work Manager 6.0 running on SMP 2.3 SP03.
The application was working fine, but after the data load that has happened in the UAT
System, we are getting the below error:
2014/08/08 00:48:56.142:
setImportParameters::STORAGE_REF_KEY=ET_COMPLEX_TABLE
2014/08/08 00:48:56.143:               + User=TS_MAINTMGR
2014/08/08 00:48:56.143:                 execute::::TS_MAINTMGR::before
BAPI execute: /SMERP/MM_CTMATPLANT_GET
2014/08/08 00:55:20.905:             + BackEnd=Java-1
2014/08/08 00:55:20.905:               Exception while updating complex
table 'ctpart': JavaBackEndError: JAVA EXCEPTION CAUGHT:
java.lang.OutOfMemoryError: Java heap space in
AgentryJavaComplexTableIterator::hasNext at
AgentryJavaComplexTableIterator.cpp:52
2014/08/08 00:55:21.099: + Thread=6588
2014/08/08 00:55:21.099:   + Thread Pool=Server
2014/08/08 00:55:21.099:     + WorkFunction=00000000020DEF90
2014/08/08 00:55:21.099:       + User=TS_MAINTMGR
2014/08/08 00:55:21.099:         + User=TS_MAINTMGR
2014/08/08 00:55:21.099:           Received Logout Request message 18
status changed to 'In Progress'
2014/08/08 00:55:21.105:         Logged out (but not yet cleaned up)
We tried to increase the min and max heap size from 256 / 512 to 512 /
2048 respectively in Agentry.ini, but are still getting the same error.
Please let us know if there is any other parameter which can be used to
fine tune this and get this up and running,
Thanks for the help.

Raviraj,
Are you working with Boopaln? The reason why I as He posted the same error (in the same complex table) With the same changes but just a different user shown.
If yes. please see that thread at: JAVA Heap Size Error in SAP Work Manager

JAVA Heap Size Error in SAP Work Manager

We are getting the below error wrt Java Heap size in the SAP Work manager Application:
2014/08/08 00:48:56.142:setImportParameters::STORAGE_REF_KEY=ET_COMPLEX_TABLE
2014/08/08 00:48:56.143: + User=MAINTMGR
2014/08/08 00:48:56.143: execute::::MAINTMGR::before BAPI execute: /SMERP/MM_CTMATPLANT_GET
2014/08/08 00:55:20.905: + BackEnd=Java-1
2014/08/08 00:55:20.905: Exception while updating complex table 'ctpart': JavaBackEndError: JAVA EXCEPTION CAUGHT: java.lang.OutOfMemoryError: Java heap space in AgentryJavaComplexTableIterator::hasNext at AgentryJavaComplexTableIterator.cpp:52
2014/08/08 00:55:21.099: + Thread=6588
2014/08/08 00:55:21.099: + Thread Pool=Server
2014/08/08 00:55:21.099: + WorkFunction=00000000020DEF90
2014/08/08 00:55:21.099: + User=MAINTMGR
2014/08/08 00:55:21.099: + User=MAINTMGR
2014/08/08 00:55:21.099: Received Logout Request message 18 status changed to 'In Progress'
2014/08/08 00:55:21.105: Logged out (but not yet cleaned up)
We have tried to increase the initial and maximum heap size in the Agentry.ini file from 256 / 512 to 512 / 2048 respectively. But the
error still persists.
Can you please let us know if there are any
other changes required for
the same?
PFA the Java backend and the user
logs. Please treat this ticket with
the highest priority.
Thanks,
Boopalan

Looks like ur getting heap size error while trying to fetch records for ctparts complex table. From platform point of view you have increased heap size. Next step is to analyze application settings for ctparts complex table. As indicated by Steve from application point you need check the need for amount of materials your trying to retrive , can you set filter for ctparts , does ctparts BAPI execute in SAP without any timeout error.
What is the version of Work Manager your using ? With WM 6.1 you have options to take advantage of data staging that is delievered as part of standard application.
Thanks
Manju.

What is the best way to verify default heap size in Java

Hi All,
What is the best way to verify default heap size in Java ? does it vary over JVM to JVM . I was reading this article http://javarevisited.blogspot.sg/2011/05/java-heap-space-memory-size-jvm.html , and it says default size is 128 MB but When I run following code :
public static void main(String args[]) {
int MB = 1024*1024;
System.out.println(Runtime.getRuntime().totalMemory()/MB);
It print "870" i.e. 870 MB.
I am bit confused, what is the best way to verify default heap size in any JVM ?
Edited by: 938864 on Jun 5, 2012 11:16 PM

938864 wrote:
Hi Kayaman,
Sorry but I don't agree with you on verification part, Why not I can verify it ? to me default means value when I don't specify -Xms and -Xmx and by the way I was testing that program on 32 bit JRE 1.6 on Windows. I am also curious significant difference between 128MB and 870MB I saw, do you see anything obviously wrong ?That spec is outdated. Since Java 6 update 18 (Sun/Oracle implementation) the default maximum heap space is calculated based on total memory availability, but never more than 1GB on 32 bits JVMs / client VMs. On a 64 bits server VM the default can go as high as 32gb.
The best way to verify ANYTHING is to address multiple sources of information and especially those produced by the source, not some page you find on the big bad internet. Even wikipedia is a whole lot better than any random internet site IMO. That's common sense, I can't believe you put much thought into it that you have to ask in a forum.

How to Increase Java Heap Size through Java Code. Increase inside Code?

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