# GitHub: Degradation in repos contents API

- Provider: [GitHub](https://outages.cc/github.md)
- Type: Incident
- State: Resolved
- Worst impact: Degraded performance
- Started: 2026-09-04 22:02 UTC
- Resolved: 2026-09-04 22:23 UTC (lasted 21 min)
- Official update: https://stspg.io/vhmsw2rhdcgv

## Updates from GitHub

### resolved, 2026-09-04 22:23 UTC

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. 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. We are improving per-zone capacity guarantees, cross-zone load-shedding, and pre-production testing of multi-zone changes to prevent recurrence.

### investigating, 2026-09-04 22:02 UTC

We are investigating reports of impacted performance for some GitHub services.