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[Andrea Rosa <1582409@xxxxxxxxxxxxxxxxxx>]

based on your last comment I am going to close this bug as it is not "reproducible".
Please feel free to re-open it if you have a clear way to reproduce it again.
Thanks


** Changed in: nova
       Status: New => Incomplete

** Changed in: nova
       Status: Incomplete => Invalid

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https://bugs.launchpad.net/bugs/1582409

Title:
  nova-api performance issues on "openstack server list"

Status in OpenStack Compute (nova):
  Invalid

Bug description:
  Relevant information TL;DR:
  RDO stable Mitaka deployed with OpenStack puppet modules.
  Keystone with fernet tokens, Nova with keystone_authtoken memcached caching set (also reproduced with sql tokens and nova without memcached caching for authtoken). nova-api is handled behind apache with mod wsgi.

  Problem TL;DR:
  In an empty new deployment on bare metal (no images, no virtual machines, etc.), "openstack server list" will intermittently take >5 seconds (up to ~10) to return. The only noticeable thing that happens when "openstack server list" is slow is that the logs will be plastered with a bunch of "_create_extension_schema", "_rebuild_extension_schema", "_register_resources" and so on.
  All other installed projects (glance, keystone, neutron) return command output consistently under 2 seconds.

  Version info:
  # rpm -qa |grep nova
  openstack-nova-api-13.0.0-1.el7.noarch
  python-novaclient-3.3.0-1.el7.noarch
  openstack-nova-scheduler-13.0.0-1.el7.noarch
  python-nova-13.0.0-1.el7.noarch
  openstack-nova-conductor-13.0.0-1.el7.noarch
  openstack-nova-common-13.0.0-1.el7.noarch

  /etc/nova/nova.conf:
  http://paste.fedoraproject.org/367251/34295211/raw/

  Example log of when things are fast: http://paste.fedoraproject.org/367272/32783146/raw/
  Example log of when things are slow: http://paste.fedoraproject.org/367271/34327341/raw/

  Happy to help provider further details if required.

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