Hi,
> Yes, this is why I was speaking with Jeff about this. > > Because I suppose that these processes have a default loop, that uses a > certain amount of CPU (kQueue implementation) Its not busy polling, if thats what you are referring to. CPU usage should be low with kqueue (because its fully event based). I think that you may face some scheduling issues (like context switching), because of the amount of haproxy instances you are running. I would really suggest to run haproxy in a single instance and process. > Would this cause a port conflict or anything like this ? > > Or when you use -sf, it automatically 'unbind' the port on the old process, > allowing it only for the new one ? HAproxy will take care of this, no conflicts are expected. > HA-Proxy version 1.4.23 2013/04/03 1.4.23 is not the latest, 1.4.24 is. Important bugfixes are in 1.4.24, though none matches your symptoms. Regards, Lukas