Comment 1 for bug 1888713

Reviewed: https://review.opendev.org/742065
Committed: https://git.openstack.org/cgit/openstack/glance/commit/?id=16a5431c665adadbfcb9909cf3a73334d796c19a
Submitter: Zuul
Branch: master

commit 16a5431c665adadbfcb9909cf3a73334d796c19a
Author: Dan Smith <email address hidden>
Date: Mon Jul 20 20:49:34 2020 -0700

    Make glance-api able to do async tasks in WSGI mode

    This teaches glance-api how to do async threading things when it is
    running in pure-WSGI mode. In order to do that, a refactoring of things
    that currently depend on eventlet is required.

    It adds a [wsgi]/task_pool_threads configuration knob, which is used
    in the case of pure-WSGI and native threads to constrain the number
    of threads in that pool (and thus the task parallelism). This will
    allow tuning by the operator, but also lets us default that to just
    a single thread in the backport of these fixes so that we can avoid
    introducing a new larger footprint in the backport unexpectedly.

    Partial-Bug: #1888713
    Depends-On: https://review.opendev.org/#/c/742047/
    Change-Id: Ie15028b75fb8518ec2b0c0c0386d21782166f759