Don't use backup AR connections for Sidekiq
This reduces the number of ActiveRecord connections by 2 for every Sidekiq process. See the commit message and https://gitlab.com/gitlab-org/gitlab-ce/issues/27713 for more information.
This reduces the number of ActiveRecord connections by 2 for every Sidekiq process. See the commit message and https://gitlab.com/gitlab-org/gitlab-ce/issues/27713 for more information.