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

The EO cache will be cleared when the AM is released in stateless mode. By default that would occur when your web session times out, but you can eagerly release it in stateless mode (when the user is finished with the task that uses that AM).
Using setClearCacheOnCommit() will more eagerly clear the EO cache, however doing so will clear the VO caches, too, for the VOs related to those EOs so it may end up causing more database requerying than you were doing before. Effectively, after a commit you'll need to requery any data that's needed for the subsequent pages the user visits. If your work flow is such that the user does not do a commit and then continue processing other rows that you've already queried, then it might be an overall slight win on memory usage, however if the user does issue a commit (say, from an Edit form) and then return back to a "list" page to process some other record, doing a clearCacheOnCommit=true will force your list page to requery the data (which it's not doing now when the entity cache isn't been eagerly cleared)
So, like many performance-related question, it depends on exactly what your app is doing.

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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
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(This is a production application so I am collecting information
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Thank you,
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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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Hi,
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As much as 60% was used.
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I discovered that ACPI.sys+0x1af44 thread was responsible (using sysinternals ProcessExplorer) under the System process.
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My NIC is "Realtek PCIe GBE Family Controller" and I'm using the latest drivers.
I discovered that if I disabled the option in Power Management for the device: "Allow this device to wake the computer", the CPU usage immediately went to normal (without restarting). But enabling it back the high CPU usage resumes. Performing another sleep
and awaking the system with power button "resets" the CPU usage issue for "good". Until i WOL from sleep again ofcourse..
I contacted the motherboard manufacturer of the problem but so far no real answer.
I'm saddened because I need the WOL feature.
I'm hoping somebody who has more insight in the behaviour of ACPI on W7 can answer my questions.
Regards
Specs:
Model Name : GA-X58A-UD7(rev. 2.0)
M/B Rev : 2.0
BIOS Ver : FC
Serial No. :
Purchase Dealer :
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Welcome to the HP Support Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
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Does entity cache cause high heap usage ? better setClearCacheOnCommit ?

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