Comment 10 for bug 1789828

Reviewed: https://review.openstack.org/602676
Committed: https://git.openstack.org/cgit/openstack/charm-cinder-ceph/commit/?id=3fb70295afadec26dc2d0fdae822bc0184b87e87
Submitter: Zuul
Branch: stable/18.08

commit 3fb70295afadec26dc2d0fdae822bc0184b87e87
Author: Edward Hope-Morley <email address hidden>
Date: Wed Sep 5 14:31:15 2018 +0100

    Add support for rbd_exclusive_cinder_pool

    As of the of the queens release cinder supports this config
    option which, if enabled, stops cinder from query all
    volumes in a pool every time it does a delete in order to
    get accurate pool usage stats. The problem is that this
    causes tons of non-fatal race conditions and slows down deletes
    to the point where the rpc thread pool fills up blocking
    further requests. Our charms do not configure pool by default
    and we are not aware of anyone doing this in the field so
    this patch enables this option by default.

    Change-Id: I5377e2886a6e206d30bd7dc38a7e43a085aa524c
    Closes-Bug: 1789828
    (cherry picked from commit b04b5f3b5f00f67eef2b76fbb5b64aba2b80719d)