AI BriefingGitHub Availability Report: May 2026
Key point
GitHub is expanding its infrastructure in response to the growth of AI workflows, and announced measures to prevent recurrence of a database migration-related outage that occurred in May.
Details
GitHub is undertaking a major infrastructure overhaul to keep pace with the rapid growth of AI-powered and agent-centric development workflows. The company has now raised its traffic shift rate to Azure to 40%, and is working to break apart its existing monolithic architecture into independent services to improve system resilience.
On May 4, a traffic surge coincided with a database schema migration, causing database connection capacity saturation and resulting in service delays. This led to observed delays and errors across key services including Pull Requests, Issues, Actions, and Copilot.
To prevent similar outages in the future, GitHub plans to implement the following measures:
- Schedule large-scale table migrations during low-traffic periods
- Introduce Automated Circuit Breakers that automatically pause migrations based on load
- Strengthen monitoring to proactively detect pressure caused by migrations
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