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[Sean Dague <sean@xxxxxxxxx>]

** No longer affects: nova/grizzly

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https://bugs.launchpad.net/bugs/1169970

Title:
  Instance queries in compute manager can be optimised

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  Some instance queries against the db through the conductor can be
  optimized to return a reduced set of instances as needed for the job
  at hand. Most of these are part of periodic tasks, so the win is kind
  of big.

  Compute methods where queries can be made more efficient:

  _get_instances_on_driver
  _poll_rebooting_instances
  _poll_rescued_instances
  _reclaim_queued_deletes
  _run_image_cache_manager_pass

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