Delays in commit processing
On September 1, 2026, between approximately 14:01 and 16:01 UTC, updates in response to pushes were delayed, temporarily showing stale diffs. The median time to refresh a diff after a push rose from the normal level of about 3 seconds to over 2 minutes at the peak, and more than 140,000 customer accounts had at least one delayed refresh during the most affected 75 minutes. Pushing commits and opening pull requests continued to work normally. The incident was caused by a sharp, concentrated surge in push volume that saturated worker pools and job queueing infrastructure. Autoscaling did not increase capacity as intended, so the backlog did not clear on its own. The incident was mitigated by manually scaling the affected worker pools and increasing push-processing capacity. This allowed the system to process the backlog, after which refresh times returned to normal. To reduce the likelihood and impact of similar incidents, we are adding quotas and throttling earlier in the push path so a
The latest update from GitHub.
State
Resolved
Started
61 d ago
2026-09-01 15:00 UTC
Lasted
1 h 1 min
until 2026-09-01 16:01 UTC
Worst impact
Degraded
Timeline
4 updatesInvestigating
1 h 1 min 100%
Updates
Times in UTCAs posted by GitHub
On September 1, 2026, between approximately 14:01 and 16:01 UTC, updates in response to pushes were delayed, temporarily showing stale diffs. The median time to refresh a diff after a push rose from the normal level of about 3 seconds to over 2 minutes at the peak, and more than 140,000 customer accounts had at least one delayed refresh during the most affected 75 minutes. Pushing commits and opening pull requests continued to work normally. The incident was caused by a sharp, concentrated surge in push volume that saturated worker pools and job queueing infrastructure. Autoscaling did not increase capacity as intended, so the backlog did not clear on its own. The incident was mitigated by manually scaling the affected worker pools and increasing push-processing capacity. This allowed the system to process the backlog, after which refresh times returned to normal. To reduce the likelihood and impact of similar incidents, we are adding quotas and throttling earlier in the push path so a
Time to update pull request diffs have improved to normal thresholds.
Diffs in the PR view may be stale for several minutes. We are investigating and scaling up resources.
We are investigating reports of degraded performance for Pull Requests
Affected components
1GitHub in the last 90 days
Full historyIncidents in 90 days
46
Days with an incident
34
Median duration
1 h 29 min
This incident
32% shorter than the median
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