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GitHub: GitHub Enterprise Importer (GEI) is experiencing degraded throughput

Timeline of updates

1. resolved2025-05-17 02:27 UTC

   Between May 16, 2025, 1:21 PM UTC and May 17, 2025, 2:26 AM UTC, the GitHub Enterprise Importer service was degraded and experienced slow processing of customer migrations. Customers may have seen extended wait times for migrations to start or complete. This incident was initially observed as a slowdown in migration processing. During our investigation, we identified that a recent change aimed at improving API query performance caused an increase in load signals, which triggered migration throttling. As a result, the performance of migrations was negatively impacted, and overall migration duration increased. In parallel, we identified a race condition that caused a specific migration to be repeatedly re-queued, further straining system resources and contributing to a backlog of migration jobs, resulting in accumulated delays. No data was lost, and all migrations were ultimately processed successfully. We have reverted the feature flag associated with a query change and are working to improve system safeguards to help prevent similar race condition issues from occurring in the future.

From GitHub’s published incident history: for incidents before Rewindex began polling this status page, only the final update text is available.

Impact, status and times are the vendor’s own, as last archived. View on www.githubstatus.com (opens in new tab).

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