GitHub Availability Report: May 2024

In May, GitHub experienced a significant performance degradation incident on the 21st, lasting over seven hours, due to a configuration change by an upstream cloud provider. This led to latency issues across several GitHub services, including GitHub Copilot Chat, GitHub Actions, and GitHub Enterprise Importer, causing delays in workflow updates and migration run times. The incident, stemming from an operating system upgrade that disrupted traffic distribution, resulted in delayed billing notifications and UI reporting, although no data was lost. Mitigation involved increasing network routes between data centers and the cloud provider, with plans to improve monitoring and alerting for load thresholds to prevent future occurrences. Users are encouraged to follow GitHub's status page for updates and the GitHub Engineering Blog for ongoing developments.