gitlab占用cpu过高的问题（gitlab cpu消耗优化）

1. 编辑配置文件
cd /etc/gitlab
vi gitlab.rb  

2. 配置文件中调整参数如下：
gitlab_rails['time_zone'] = 'Asia/Shanghai'
unicorn['worker_processes'] = 2
unicorn['worker_memory_limit_min'] = "100 * 1 << 20"
unicorn['worker_memory_limit_max'] = "250 * 1 << 20"
sidekiq['concurrency'] = 8
postgresql['shared_buffers'] = "128MB"
postgresql['max_worker_processes'] = 4
prometheus_monitoring['enable'] = false

3. 应用更改后的配置、重启gitlab
gitlab-ctl reconfigure
gitlab-ctl restart