Database decomposition is underway and many features will be broken due to the decomposed databases. For more details of the project, check out https://gitlab.com/groups/gitlab-org/-/epics/6168. With the urgency of increasing database scalability, it's necessary to parallelize all the known work by domain experts and plan these issues at the earliest opportunity to accelerate and derisk. For more context, please refer to this internal Slack communication https://gitlab.slack.com/archives/C9X79MNJ3/p1626971301285400. ## Documentation You can read more about common patterns to solve these problems in https://docs.gitlab.com/ee/development/database/multiple_databases.html