Error budgets exceeded for Create: Source Code

The error budget allowance for groupsource code has been exceeded.

After a preliminary investigation of what is causing Apdex overrun, it seems it is well-known controllers that have had extensive tuning in the past.

• Repositories::GitHttpController#info_refs
• POST /api/:version/internal/allowed
• Repositories::GitHttpController#git_upload_pack

References

• Kibana
• Another Kibana
• Error budgets
• Error budgets for Create: Source Code (gitlab-com/runbooks!4544 - merged)

This issue is a spike to confirm the root cause of the budget overrun and plan possible improvements.