Incident with Pull Requests

Timeline

1. 22:13 UTC GitHub status page · Reported Incident with Pull Requests
2. 22:13 UTC GitHub status page · Investigating We are investigating reports of degraded performance for Pull Requests
3. 22:27 UTC GitHub status page · Monitoring The degradation affecting Pull Requests has been mitigated. We are monitoring to ensure stability.
4. 22:32 UTC GitHub status page · Monitoring A git fileserver issue caused a brief delay in creating some merge commits - we've isolated the underlying server and already observed recovery.
5. 23:22 UTC GitHub status page · Resolved On September 20, 2026, between 21:46 and 22:24 UTC the Pull Requests service was degraded and pull request merge and test-merge commits were created late, with delays reaching approximately four minutes at peak. Merge commits were delayed rather than lost. Because some Actions workflow runs start only after a pull request's merge commit is created, a subset of workflow runs for pull request events were also delayed. This was due to a routine repository maintenance job for an unusually large repository consuming nearly all of the memory on a single Git storage server, which left that server…