GitHub Copilot · 28d ago
Degradation in repos contents API
ResolvedYes — GitHub Copilot had a problem on September 4, 2026, and GitHub Copilot has since marked it resolved. GitHub Copilot's latest word: “On September 4, 2026, between approximately 21:45 and 22:07 UTC, some users experienced errors and elevated latency for repository operations. The incident was fully resolved at 22:23 UTC.<br /><br />The cause was a capacity change that spread one of our clusters across additional availability zones; our zone-aware traffic routing kept sending requests to the original zone for performance, overloading a small set of servers while the new capacity sat idle. We resolved the incident by reverting the change and letting traffic rebalance.<br /><br />We are improving per-zone capacity guarantees, cross-zone load-shedding, and pre-production testing of multi-zone changes to prevent recurrence.”
Timeline
Started: 9/4/2026, 10:02:15 PM
Last update: 9/15/2026, 11:34:38 PM
Resolved: 9/4/2026, 10:23:34 PM
Updates
resolved
On September 4, 2026, between approximately 21:45 and 22:07 UTC, some users experienced errors and elevated latency for repository operations. The incident was fully resolved at 22:23 UTC.<br /><br />The cause was a capacity change that spread one of our clusters across additional availability zones; our zone-aware traffic routing kept sending requests to the original zone for performance, overloading a small set of servers while the new capacity sat idle. We resolved the incident by reverting the change and letting traffic rebalance.<br /><br />We are improving per-zone capacity guarantees, cross-zone load-shedding, and pre-production testing of multi-zone changes to prevent recurrence.
9/4/2026, 10:23:34 PM
investigating
We are investigating reports of impacted performance for some GitHub services.
9/4/2026, 10:02:15 PM
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