Hi
I am performing a scale test and I see that after creating 500 Vms with ping 
traffic between them it took almost 1 hr for the connection tracking
To clean up and ovs agent was busy doing this and unable to service any new 
port bind requests on some computes for almost an hr
It took that long for conntrack clean up to complete


I see the following bug
https://bugs.launchpad.net/neutron/+bug/1513765

And I also have the fix below
https://git.openstack.org/cgit/openstack/neutron/commit/?id=d7aeb8dd4b1d122e17eef8687192cd122b79fd6e


Still see really long times for conntrack cleanup

What is the solution to this problem in scale scenarios?
Ajay

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