On a tangent... Does high watermark=0 really make pub/ sub fully reliable? Wasn't my understanding. Could be wrong.
How big are the messages you are sending? Can you reproduce on same hardware with a hello world pub sub for messages of the same size? On 14 Mar 2014 15:06, "Giacomo Tesio" <[email protected]> wrote: > Hi, I'm getting 5 to 10 seconds delay in on a pub/sub socket with low load > (in a context with heavy load on other sockets). > > I'm using NetMQ on Windows 7, with tcp transport on 127.0.0.1 (indeed it > should be ipc, but it's not supported on Windows AFAIK). > > This is the topology: > > We have Server A, Client B and Client C. > > Server binds a PUB with heavy load (let's call it PUB1), publishing 50-100 > msg/s with few daily peaks at 1000 msg/s. > > Server binds a PUB with small load (let's call it PUB2). publishing 50-500 > msg *each day*. Note however that these messages are sent in groups of 1 > to 5 in a few milliseconds. > > Client B connect with a SUB socket to PUB1, > Client C connects with two SUB socket to PUB1 and PUB2. > > My issue is that when a group of messages is sent in PUB2, the first is > received almost instantly from Client C, but the others are received > seconds after, at seconds of distances. > > For example, here are a few times from today problems. > > Sent from Server A -> Received from Client C > 09:00:59.608 -> 09:01:05.643 > 09:01:00.055 -> 09:01:05.64 > 09:01:00.117 -> 09:01:10.928 > 09:01:02.883 -> 09:01:16.172 > 09:01:05.541 -> 09:01:18.754 > > > How can I reduce this delay? > I tried to increase the ThreadPoolSize up to the number of CPUs, but > without success. > Note that I (must) have HighWaterMark = 0 on every socket (I can't loose > messages), but the machine is full of free memory (4 GB are always free) > and never use more than 40% of each cpu. > > > Giacomo > > > _______________________________________________ > zeromq-dev mailing list > [email protected] > http://lists.zeromq.org/mailman/listinfo/zeromq-dev > >
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