On 2013-01-23, at 9:29 AM, Sisi Li wrote:
> Dear all,
>
> We have a wonder accounting application that is misbehaving. As part of the
> application the user processes a large amount of transactions, generating
> invoices and so on in a single LongResponse Thread.
>
> Here is the code inside the run method of that thread:
>
> public void _run() {
>
> editingContext.setUndoManager(null);
>
> editingContext.lock();
Is editingContext in the default EOObjectStoreCoordinator or one created
specifically for this thread? If in the default, this is going to impact other
users.
> try
>
> {
>
> setup();
>
> createPaymentReceivedAndMadeTransactions();
>
> editingContext.saveChanges();
You probably want to do that in small batches, and dispose and re-creacte the
EC every N transactions. That will generally work much better for memory
consumption.
>
> NSNotificationCenter.defaultCenter().postNotification(Repayment.REPAYMENT_TRANSACTIONS_PAID,
> accountGID);
>
> }
>
> catch (Exception e)
>
> {
>
> editingContext.revert();
>
> e.printStackTrace();
>
> }
>
> finally
>
> {
>
> editingContext.unlock();
>
> editingContext.dispose();
>
> System.gc();
>
> }
>
> }
>
>
>
>
>
> You will notice the GarbageCollector call in the finally catch. I have
> checked the advice on this link:
> https://en.wikibooks.org/wiki/WebObjects/EOF/Using_EOF/Memory_Management#Calling_System.gc.28.29
> . I tried multiple solutions to reduce the load but to no avail.
I doubt that is going to solve this problem.
Chuck
>
> I have profiled the application and there is a tiny memory leak but mostly
> with repeated processing of payments (one after the other) the GC does not
> seem to clear the memory fast enough and the application runs into problems.
>
> http://imageshack.us/photo/my-images/841/withgcclear.png/
>
> http://imageshack.us/photo/my-images/145/withoutgcclear.png/
>
>
>
> I would very much like to get your opinions before going to garbage collector
> for a solution.
>
> Regards,
>
>
>
> Mouradk
>
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