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Resolved GitHub · degraded service

Incident with Pull Requests

Posted 20 Sep 22:13 UTC, last seen today 11:33 UTC.

GitHub status pageOn the status board
Unknown Duration: the provider stated no start
4Updates posted
1Other incident at the same time

What it affected

As the provider names it

Pull Requests

What the provider posted

Newest first
  1. 20 Sep 23:22 UTCResolvedOn 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 unable to serve the Git operations used to create merge commits. We mitigated the incident by removing the affected server from service at 22:18 UTC, after which the queued merge commits were created within six minutes. We have capped the memory a single repository maintenance job may consume so that one repository cannot exhaust a server, and we have improved monitoring and alerting on storage server health to reduce our time to detection and mitigation of issues like this one in the future.
  2. 20 Sep 22:32 UTCUpdateA git fileserver issue caused a brief delay in creating some merge commits - we've isolated the underlying server and already observed recovery.
  3. 20 Sep 22:27 UTCMonitoringThe degradation affecting Pull Requests has been mitigated. We are monitoring to ensure stability.
  4. 20 Sep 22:13 UTCInvestigatingWe are investigating reports of degraded performance for Pull Requests

Around it

From the sources ChangeIntel reads; a match in time is not a cause

Elsewhere at the same time

Earlier incidents in the 14 days before

What changed

First observed 14 Oct 2026

No field changes in the recorded history.

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Sources read 14 Oct 11:21 UTC · 251 of 253 readable · 250 fully read · documentation 0/409 current

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