After install GitLab Sidekiq makes default 25 workers. To change it do simple step.
Touch file sidekiq.yml
in /home/git/gitlab/config
and paste:
---
:concurrency: 5
Next restart GitLab service gitlab restart
and done.
Other posible options:
---
:verbose: false
:pidfile: ./tmp/pids/sidekiq.pid
:concurrency: 25
# Set timeout to 8 on Heroku, longer if you manage your own systems.
:timeout: 30
:queues:
- [critical, 3]
- [default, 2]
- [low, 1]