[fullstack] OOM mysql service

[Rodolfo Alonso]

During the execution of the fullstack tests, the MySQL service fails because of an OOM exception.

Snippet: https://paste.opendev.org/show/807794/

Logs: https://bf5b60b7a51f4300082c-240d90c38889dafa7ed4da1677aa4bc1.ssl.cf2.rackcdn.com/800967/5/check/neutron-fullstack-with-uwsgi/662163d/testr_results.html

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/neutron/+/802907

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/neutron/+/802907
Committed: https://opendev.org/openstack/neutron/commit/a27bb19e74d0508520d8e827788c2710e97880a6
Submitter: "Zuul (22348)"
Branch: master

commit a27bb19e74d0508520d8e827788c2710e97880a6
Author: Rodolfo Alonso Hernandez <email address hidden>
Date: Thu Jul 29 15:45:38 2021 +0000

    Reduce the fullstack concurrency to 2

    In order to mitigate the OOM problems in the CI, this patch reduces
    the fullstack concurrency to 2. That should reduce the memory
    consumption and will avoid those nasty OOM exceptions.

    Closes-Bug: #1938455
    Change-Id: I4de4b089e615353b7fde82bd54e0abefa244c8ab

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/neutron 19.0.0.0rc1 release candidate.