Clemens, Set the HWM before doing the connect. Note this line from the zmq_setsockopt man page:
"Caution: All options, with the exception of ZMQ_SUBSCRIBE, ZMQ_UNSUBSCRIBE and ZMQ_LINGER, only take effect for subsequent socket bind/connects." -Pieter On Sat, Nov 19, 2011 at 10:45 AM, Clemens Lutz <[email protected]> wrote: > Hi Pieter, > > Thanks for the response. Attached is a test case where setting ZMQ_HWM doesn't > work. Setting ZMQ_HWM to 1024 with 1 KiB messages should limit the queue's > size to ~1 MiB, right? "top" still reports around one GiB of memory usage when > sending that amout of data. > This is with ZMQ v.2.1.10. > > Cheers, > Clemens > > > On Friday 18 November 2011 08.14:49 Pieter Hintjens wrote: >> On Fri, Nov 18, 2011 at 3:59 AM, Clemens Lutz <[email protected]> wrote: >> > I've been writing a benchmark to verify ZeroMQ's performance is near >> > line-rate on the machines I'm using. However, I keep running into the >> > issue of ZMQ allocating memory on the sender's side equal to the amount >> > I'm sending. If I want to send more data than I have physical memory >> > the program will exit with an "out of memory" error. >> >> zmq_send is asynchronous, so does not send right away but queues the >> message in memory. Actual sending is limited by the network capacity. >> So messages will build up. Setting ZMQ_HWM on the sender socket should >> limit the number of messages. If you have a test case where setting >> ZMQ_HWM doesn't work, please post it. >> >> -Pieter >> _______________________________________________ >> zeromq-dev mailing list >> [email protected] >> http://lists.zeromq.org/mailman/listinfo/zeromq-dev > _______________________________________________ > zeromq-dev mailing list > [email protected] > http://lists.zeromq.org/mailman/listinfo/zeromq-dev > > _______________________________________________ zeromq-dev mailing list [email protected] http://lists.zeromq.org/mailman/listinfo/zeromq-dev
