Comment 4 for bug 1494416

As Eugene pointed out, q-l3-plugin queue got overflown because only one neutron-server process per controller processes it, while there are 16 worker processes per controller. Neutron team fixed this - now all workers consume from q-l3-plugin. Now system CPU becomes limiting factor: if one restarts all l3 agents, it can be seen that CPU on controllers is actively used by rabbitmq, neutron-server and mysql and that current capacity is still not enough to process all requests of l3 agents in time.

Neutron team continues investigating the issue.