Comment 3 for bug 1931047

Reviewed: https://review.opendev.org/c/openstack/tripleo-heat-templates/+/795010
Committed: https://opendev.org/openstack/tripleo-heat-templates/commit/09bcacd25a7217ce66eec10ccfda4847e6d3d87a
Submitter: "Zuul (22348)"
Branch: master

commit 09bcacd25a7217ce66eec10ccfda4847e6d3d87a
Author: Takashi Kajinami <email address hidden>
Date: Mon Jun 7 10:31:32 2021 +0900

    Add support for keystone_authtoken/memcache_use_advanced_pool

    This change introduces a single parameter, MemcacheUseAdvancedPool,
    to enable usage of advanced connection pool in keystone middleware.
    This is useful to avoid bursting connection to memcached.

    Note that the default value of memcached_use_advanced_pool was changed
    from false to true during Xena cycle[1], so this parameter is no longer
    required in master. However the change in keystonemiddleware will
    never be backported. This change is created so that we can switch to
    advanced pool even in older releases.

    [1] https://review.opendev.org/c/openstack/keystonemiddleware/+/773939

    Closes-Bug: #1931047
    Change-Id: I2887249af44ccfdae1592dd9120d3366fa059876