[zeromq-dev] Apparent queuing on PUB/SUB fan-in despite HWM=1

Martin Sustrik sustrik at 250bpm.com
Thu May 12 09:58:51 CEST 2011


> AFAICT, the bottom line is that (!!!) despite HWM=1 (!!!) on both sides
> of my PUB/SUB sockets there can be significant end-to-end latency, and
> that latency tends to grow with time. This behavior is consistent with
> intermediate message queuing, something the HWM is -- at least in my
> understanding -- supposed to prevent.

That looks almost like a proof there's buffering going on. Still, I need 
to reproduce it on my box to be able to fix it. Any chance of minimising 
the test case to something I can run myself?


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