Re: Memory leak
Re: Memory leak
- Subject: Re: Memory leak
- From: Chuck Hill <email@hidden>
- Date: Wed, 23 Jan 2013 11:13:45 -0800
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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--
Chuck Hill Senior Consultant / VP Development
Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems.
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| | >Memory leak (From: Sisi Li <email@hidden>) |