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[OpenStack Infra <1810642@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.opendev.org/615435
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=0b683028af72ca38905703a30f3a6b48377150d3
Submitter: Zuul
Branch:    master

commit 0b683028af72ca38905703a30f3a6b48377150d3
Author: Gary Kotton <gkotton@xxxxxxxxxx>
Date:   Sun Nov 4 02:03:45 2018 -0800

    Improve metadata performance
    
    Save many requests to the neutron service if the provider
    has recently been queried.
    
    Commit 622a845b757aa35932f703963beffc764d8ae244 has the details
    about the provider support. The caching helps improve this
    support as the neutron service will not be queried many times.
    
    Closes-Bug: #1810642
    
    Change-Id: I19054fae14f95dc3ea73efde45df7e1a59086b44


** Changed in: nova
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1810642

Title:
  Neutron service taking up all CPU resources

Status in OpenStack Compute (nova):
  Fix Released

Bug description:
  The neutron service has very high CPU utilization when we have the following scenario:
  1. NSX neutron plugin is used
  2. There are thousands of instances that have puppet installed which are constantly polling the metadata service

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