[zeromq-dev] Slow subscriber runs out of memory

Joshua Foster jhawk28 at gmail.com
Tue May 24 00:58:38 CEST 2011

I ported the code to Java and it does not increase in memory. My guess 
is that the clrzmq bindings are at fault.



On 5/23/2011 11:35 AM, Martin Sustrik wrote:
> On 05/23/2011 05:17 PM, a frost wrote:
>> I am evaluating ZMQ, doing some initial testing with a PUB-SUB
>> configuration. The publisher and subscriber are in separate processes on
>> the same machine. I am using TCP transport and have set HWM=10 on both
>> sides.
>> The subscriber is slow compared to the publisher and its memory usage
>> increases rapidly as messages are received from the publisher.
>>    Eventually, the subscriber process runs out of memory.
>> I want messages to be discarded at the subscriber end if it cant process
>> them fast enough, rather than memory usage increasing without bound as
>> received messages are buffered. I thought setting HWM on the SUB side
>> would give me this behaviour, but setting this has no effect on memory
>> usage.
> Yes. The messages should be discarded.
>> Any help would be appreciated. Source code for my test programs is at:
>> Publisher: http://pastebin.com/2YtRAi8C
>> Subscriber: http://pastebin.com/Sr16RP75
> The programs look OK to me. I guess there is a bug either in 0MQ or
> jzmq. I wonder if the same thing happens in C (ie. when jzmq is not used).
> Martin
> _______________________________________________
> zeromq-dev mailing list
> zeromq-dev at lists.zeromq.org
> http://lists.zeromq.org/mailman/listinfo/zeromq-dev

More information about the zeromq-dev mailing list