GitHub availability report: September 2026
In September, we experienced two incidents that resulted in degraded performance across GitHub services. The post GitHub availability report: September 2026 appeared first on The GitHub Blog .
GitHub's September 2026 availability report details progress made over the past two months, focusing on reducing shared-database pressure, adding overload controls, expanding failure containment for pull requests, and moving production workloads to Azure. Significant incidents and missed migration targets indicate that the work is not complete, with 120 out of 160 production services deployed in Central US and 13 out of 51 primary MySQL databases moved by October 7.
Azure handled a significant portion of GitHub's read traffic, but the September 11 capacity pause and temporary relief demonstrate ongoing challenges in achieving durable capacity. GitHub Actions saw improvements in operating headroom, and production changes reduced Redis operations and CPU usage. Despite these efforts, the report emphasizes that improvements must continue to reduce customer risk under real conditions, as demonstrated by the August 6 actions outage, August 17 github.com outage, September failover disruption, and controlled capacity pause.
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