[zeromq-dev] epgm memory leak - need hepl

[Erik Aronesty]

I see the same issue in perl.   First, be sure you've got the latest
version, there have been some leak patched in the last few months (i htink
pub sub only though?  can't remember).

But more importantly, try setting the ZMQ_HWM option on your queues, so
there's no potential for them to grow infinitely large.   You can wind up
with lots of ram allocated if the receiver cant process messages fast
enough during a burst, for example.






On Mon, Jun 17, 2013 at 2:48 PM, Parag Patel <Parag.Patel at fusionts.com>wrote:

>  Any ideas about this?  We’re seeing something similar with a Java
> application.  We noticed that the JVM memory size is not growing, however,
> the process’s memory space is growing.****
>
> ** **
>
> *From:* zeromq-dev-bounces at lists.zeromq.org [mailto:
> zeromq-dev-bounces at lists.zeromq.org] *On Behalf Of *Alexander Zhitlenok
> *Sent:* Friday, June 14, 2013 6:07 PM
> *To:* zeromq-dev at lists.zeromq.org
> *Subject:* [zeromq-dev] epgm memory leak - need hepl****
>
> ** **
>
> Hello,****
>
> My name is Alex Zhitlenok.****
>
> We are using ZeroMq in a custom C# Application on Windows.****
>
> We use the multicast/epgm protocol. ****
>
> When we run our application the memory consistently grows and sometimes
> the app crashes due to an Out of Memory Exception.****
>
> To try and detect what causes the problem, we’ve created a very simple
> test (just a few lines to avoid GC influence, etc.)****
>
> Even when we run this simple test program, the memory continues to grow
> (at a slow and linear rate, but continues to grow regardless)****
>
> To avoid “no listeners” problem in the test we run mdump.exe as a
> fake-client listening to the multicast port. ****
>
> What are we doing wrong?****
>
> We use ****
>
> ZeroMQ 3.2.3****
>
> OpenPGM 5.2.122 (http://code.google.com/p/openpgm/)****
>
> Clrzmq build for 3.2.3 (https://github.com/zeromq/clrzmq)****
>
> Mdump (https://community.informatica.com/solutions/informatica_mtools)****
>
> ** **
>
> Software\Hardware:****
>
> Win7 Professional\64 bit****
>
> 10g network****
>
> ** **
>
> Here is the test code (the real addresses are substituted with XYZ):****
>
> ** **
>
>         static void Main(string[] args)****
>
>         {****
>
>             ZmqContext context = ZmqContext.Create();****
>
>             ZmqSocket soc = context.CreateSocket(ZeroMQ.SocketType.PUB);**
> **
>
> ** **
>
>             soc.MulticastHops = 16;****
>
>             soc.MulticastRate = 100000;****
>
>             //soc.SendBufferSize = 1000000;****
>
>             soc.SendHighWatermark = 100;****
>
> ** **
>
>             soc.Bind("epgm://192.168.XYZ.XYZ;239.10.10.10:PORT");****
>
> ** **
>
>             byte[] test = new byte[1000];****
>
>             test[1] = (byte)('X');****
>
> ** **
>
>             for (int i = 0; ; ++i)****
>
>             {****
>
>                 test[0] = (byte) ('0' + (i%10));****
>
>                 SendStatus ss = soc.Send(test);****
>
>                 if( ss != SendStatus.Sent )****
>
>                     System.Diagnostics.Debug.WriteLine(String.Format(
> "Status:{0}", ss));****
>
>                 Thread.Sleep(100);****
>
>             }****
>
>         }****
>
> ** **
>
> Thank you,****
>
> Alex****
>
> ** **
>
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>
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