[umbrai_nation]

"Of around 310 GB only about 4.5 GB is left"

What is gitlab storing in their database? From what I understand, the repos were untouched by the DB problems, so what is taking up a third of a terabyte of DB space?

[YorickPeterse]

issues, merge requests (titles, descriptions, etc), comments, events ("X pushed to Y"), labels, projects, milestones, users, permissions, project statistics, CI builds information, abuse reports, the list goes on.

[X-Istence]

Tickets, tags, labels, users information/data and more. Sounds like they also host snippets out of the PostgreSQL database.

310 GB for a database is not all that large.

[neandrake]

The database might have tables for commit data so history etc. can be searched, and possibly used for managing on-server operations like merges etc.