Hi, It turns out that there is a 1:1 relationship between rpc_thread_pool_size messaging config [1] and the number of instances that can be spawned simultaneously. Please see bug [2] for more details. I think this should be at least documented. Thoughts? Thanks, Oleg [1] https://github.com/openstack/oslo.messaging/blob/master/oslo/messaging/_executors/impl_eventlet.py [2] https://bugs.launchpad.net/neutron/+bug/1372049 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20141002/713c426e/attachment.html>