High heap usage even when system idle, is this caused by AMPool setting ?

Hi All,
We are running ADF BC 10.1.3.3 with 2 JVM OC4J instance. Max heap is 3.5 GB.
I notice that when system is idle, the heap usage for each JVM can be between 1.5 to 2 GB. It is confusing me because relatively no user is accessing the application.
Then I am suspecting that the setting in Apps Module Pool may be the cause, i.e :
<jbo.recyclethreshold>50</jbo.recyclethreshold>
<jbo.ampool.maxavailablesize>90</jbo.ampool.maxavailablesize>
<jbo.ampool.minavailablesize>25</jbo.ampool.minavailablesize>
Is there anything wrong with the setting that may cause AM Pool Monitor busy doing wrong thing ?
Thank you for your help,
xtanto

mcmillan wrote:
rohankolay wrote:Right now i have kernel26-2.6.35.4 which i updated on 27 aug. That is around the same time the problem began.Should i downgrade it to kernel26-2.6.35.3 or kernel26-2.6.34.3?
I think most people have been seeing the problems in any of the 2.6.35 kernels, so 2.6.34.3 would be my recommendation
+1
And put kernel26 in IgnorePkg.

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mcmillan wrote:
rohankolay wrote:Right now i have kernel26-2.6.35.4 which i updated on 27 aug. That is around the same time the problem began.Should i downgrade it to kernel26-2.6.35.3 or kernel26-2.6.34.3?
I think most people have been seeing the problems in any of the 2.6.35 kernels, so 2.6.34.3 would be my recommendation
+1
And put kernel26 in IgnorePkg.

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Hello arch fellows!
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Please click the White Kudos star on the left, to say thanks.
Please mark Accept As Solution if it solves your problem.

Does entity cache cause high heap usage ? better setClearCacheOnCommit ?

Hi all,
During peak load (150-200 users) of our production ADF application (10.1.3.3), the heap usage can be reach 3GB, causing JVM very busy doing frequent GC.
Is this possibly because the 'by default uncleared' entity cache ?
What is the implication is I do 'setClearCacheOnCommit()' ?
Thank you for your help,
xtanto

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Thank you,
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I do not know if my solution to my Heap problem will help any of you but I thought I would just post it here
just incase yourselves or others come looking for possible solutions.
I created a very simlpe report with 2 groups and not much in the way of complex functions. Whilst reporting against about
100 pages of output everything worked fine, but as soon as we pushed the report up to 500+ pages we got all sorts
of issues.
java.lang.OutOfMemoryError: Java heap space
After much hair pulling and trial and error I discovered that the issue came about where I did not declare formula variables as local. I was concatinating various street address details for of the envelope windows.
Stringvar Address;      //    I was using this declaration
Global Stringvar Address;    // Specific Global declaration
Local Stringvar Address;    // Changed to this declaration
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Cheers
Darren

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Could this unclosed() byteArrayInputStream cause high Heap usage ?

Hi all,
As part of our reporting integrated with our JSF/JSP application, the
report is converted to PDF then sent to browser for user to display.
mean while during peak load our Heap usage could reach 3.5GB - 4GB. So
I am suspecting the unclosed byteArrayInputStream is the cause.
(This is a production application so I am collecting information
before change the code)
Is the unclosed() byteArrayInputStream really cause the problem ?
(the codes is below)
Thank you,
Krist
ByteArrayInputStream byteArrayInputStream = (ByteArrayInputStream)
reportClientDoc.getPrintOutputController().export(exportOptions);
reportClientDoc.close();
writeToBrowser(byteArrayInputStream, response, "application/csv",
EXPORT_FILE);
private void writeToBrowser(ByteArrayInputStream byteArrayInputStream,
HttpServletResponse
response, String mimetype, String exportFile)
throws Exception {
byte[] buffer = new byte[byteArrayInputStream.available()];
int bytesRead = 0;
response.reset();
response.setHeader("Content-disposition", "inline;filename=" +
exportFile);
response.setContentType(mimetype);
//Stream the byte array to the client.
while((bytesRead = byteArrayInputStream.read(buffer)) != -1)
{ response.getOutputStream().write(buffer , 0,
bytesRead);}
//Flush and close the output stream.
response.getOutputStream().flush();
response.getOutputStream().close();
}

xtanto wrote:
Is the unclosed() byteArrayInputStream really cause the problem ? Source code from 1.6.12
class ByteArrayInputStream extends InputStream {
     * Closing a <tt>ByteArrayInputStream</tt> has no effect. The methods in
     * this class can be called after the stream has been closed without
     * generating an <tt>IOException</tt>.
     * <p>
    public void close() throws IOException {
    }

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You have to open a Cisco TAC case and they will give you access to a secial download area.
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If you have the contract you can order the 7.0(2) upgrade via the PUT tool. You can't download it Cisco have to ship you the CD.
http://www.cisco.com/upgrade
If you don't have a contract you have a problem
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Graham

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hi,
when i use office it causes a very high cpu usage even when its in idle mode.
i am unable to work with it, because its extremely slow.
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thanks for your help!
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I do have a high cpu usage problem when the system is idle. I bought the laptop (lenovo x230 tablet) with windows 7 installed in it. Then upgraded to windows 8. But ever since I have problems with high cpu usage by the system even when the computer is idle.
Only the system by itself uses around 30% of the cpu all the time. I ran xperf, and here is the result of it:
http://sdrv.ms/Kj6CFN
I appreciate any help you can provide.
Thanks,

Hi,
I'm sorry for that the log you provide can't be opened on my computer. While according to your description, it should had a special process that consume CPU usage when system idle Iguess, isn't it?
You can use
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To gave a better insight about this problem, you can take a ScreenShot for this problem and provide the picture here.
Roger Lu
TechNet Community Support

High heap usage even when system idle, is this caused by AMPool setting ?

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