partially covered by: https://blueprints.launchpad.net/ceilometer/+spec/resource-metadata-caching
further improvements may be covered by: https://review.openstack.org/#/c/209799/
partially covered by: https:/ /blueprints. launchpad. net/ceilometer/ +spec/resource- metadata- caching
further improvements may be covered by: https:/ /review. openstack. org/#/c/ 209799/