GitHub's aggregate uptime (89.43% over 90 days) is characterized as "zero nines," but the metric is misleading because it treats any service outage as full system downtime. Individual services like core Git operations have 98.98% uptime; the low aggregate figure results from non-overlapping failures across ten separate services, not uniformly poor reliability.
Infrastructure
In defense of GitHub's poor uptime
GitHub's 89% aggregate uptime metric is misleading—individual services like Git achieve 99% reliability, with the low overall figure stemming from non-overlapping failures across ten services, not uniformly poor performance.
Saturday, April 11, 2026 12:00 PM UTC2 MIN READSOURCE: LobstersBY sys://pipeline
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infrastructure