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[Eugene Nikanorov <enikanorov@xxxxxxxxxxxx>]

Public bug reported:

In a case when large number of VMs (> 2-3 thousand) reside in one L2
network, security group listing for ports requested from OVS agents
consumes significant amount of CPU.

When VM is spawned on such network, every OVS agent requests update sec groups info on each of its devices. 
Total time needed to process all such RPC requests that were caused by 1 VM spawn may reach tens of cpu-seconds.

** Affects: neutron
     Importance: Medium
     Assignee: Eugene Nikanorov (enikanorov)
         Status: New

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https://bugs.launchpad.net/bugs/1429753

Title:
  Improve performance of security groups rpc-related code

Status in OpenStack Neutron (virtual network service):
  New

Bug description:
  In a case when large number of VMs (> 2-3 thousand) reside in one L2
  network, security group listing for ports requested from OVS agents
  consumes significant amount of CPU.

  When VM is spawned on such network, every OVS agent requests update sec groups info on each of its devices. 
  Total time needed to process all such RPC requests that were caused by 1 VM spawn may reach tens of cpu-seconds.

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