In March, we experienced four incidents that resulted in degraded performance across GitHub services. March 03 18:59 UTC (lasting 1 hour and 10 minutes) On March 3, 2026, between 18:46 and 20:09 UTC, GitHub experienced a period of degraded availability impacting github.com, the GitHub API, GitHub Actions, Git operations, GitHub Copilot, and other dependent services. At the peak of the incident, github.com request failures reached approximately 40%. During the same period, approximately 43% of GitHub API requests failed. Git operations over HTTP had an error rate of approximately 6%, while SSH was not impacted. GitHub Copilot requests had an error rate of approximately 21%. GitHub Actions experienced less than 1% impact. This incident shared the same underlying cause as an incident in early February, where we saw a large volume of writes to the user settings caching mechanism.…