---
features:
  - |
    The configuration option
    ``[compute]resource_provider_association_refresh`` can now
    be set to zero to disable refresh entirely. This follows on from `bug
    1767309`_ allowing more aggressive reduction in the amount of traffic to
    the placement service.

    The cache can be cleared manually at any time by sending SIGHUP to the
    compute process. This will cause the cache to be repopulated the next time
    the data is accessed.

    .. _`bug 1767309`: https://bugs.launchpad.net/nova/+bug/1767309
