[Bug 1387244] [NEW] Increasing number of InstancePCIRequests.get_by_instance_uuid RPC calls during compute host auditing

[James Page]

Public bug reported:

Environment: Ubuntu 14.04/OpenStack Juno Release

The periodic auditing on compute node becomes very RPC call intensive
when a large number of instances are running on a cloud; the
InstancePCIRequests.get_by_instance_uuid call is made on all instances
running on the hypervisor - when this is multiplied across a large
number of hypervisors, this impacts back onto the conductor processes as
they try to service an increasing amount of RPC calls over time.

** Affects: nova
     Importance: Undecided
         Status: New

** Affects: nova (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: juno scale-testing

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https://bugs.launchpad.net/bugs/1387244

Title:
  Increasing number of InstancePCIRequests.get_by_instance_uuid RPC
  calls during compute host auditing

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