Registry restarts every Sunday at 4am

Hi everyone,
I don’t have an issue per se, but I’m looking for some info:
I have a self hosted Gitlab CE 18.2.8 on Ubuntu 22.04 and, since a couple of weeks, I started noticing that the registry restarts every Sunday at 4am (GMT+2) and it takes 7 to 10 min to be available again.

Is this normal expected behavior?

I’ve been looking at the documentation, but I can’t see anything related to my question.

The logs are pretty clear and don’t show any errors:

2025-10-12_02:00:01.93884 time=“2025-10-12T04:00:01.937+02:00” level=info msg=“attempting to stop server gracefully…” database_drain_timeout=0s http_drain_timeout=0s quit_signal=terminated
2025-10-12_02:00:01.94034 time=“2025-10-12T04:00:01.940+02:00” level=info msg=“graceful shutdown successful” database_drain_timeout=0s http_drain_timeout=0s quit_signal=terminated

There’s also mention of the Cleanup job running, but this runs every hour and doesn’t require a registry restart, so I assume it’s a red herring.

I’d like to find out also all of the scheduled cron jobs, but I can’t find it either in the web gui or cli.

System Info:

System information
System: Ubuntu 22.04
Current User: git
Using RVM: no
Ruby Version: 3.2.5
Gem Version: 3.6.9
Bundler Version:2.6.5
Rake Version: 13.0.6
Redis Version: 7.2.9
Sidekiq Version:7.3.9
Go Version: unknown

GitLab information
Version: 18.2.8
Revision: 01bcae1d66b
Directory: /opt/gitlab/embedded/service/gitlab-rails
DB Adapter: PostgreSQL
DB Version: 16.10

So far I don’t see this as a blocking issue, and, considering the timing, I’m chalking it up to “scheduled maintenance job“ but it would be interesting to understand the why.

Thanks in advance,
Cheers
-cino