Upstash incident

Upstash Redis: Intermittent latency on us-east-1

Resolved after 5 minutes, on January 23, 2026.

resolved Jan 23, 2026, 05:05 PM UTC

We identified the cause of elevated latency impacting some databases in us-east-1 region between 15:30–15:35 UTC as a sudden surge of connection attempts that hit OS-level connection limits on our proxy layer. This resulted in slower new connection establishment and increased latency for some requests. Databases were not impacted. We are implementing additional proxy-level metrics and safeguards to detect and manage similar edge cases earlier.

Started
Jan 23, 2026, 03:30 PM UTC
Resolved
Jan 23, 2026, 03:35 PM UTC
Duration
5m
Detected by Pingoru
Jan 23, 2026, 03:30 PM UTC

Update timeline

  1. resolved Jan 23, 2026, 05:05 PM UTC

    We identified the cause of elevated latency impacting some databases in us-east-1 region between 15:30–15:35 UTC as a sudden surge of connection attempts that hit OS-level connection limits on our proxy layer. This resulted in slower new connection establishment and increased latency for some requests. Databases were not impacted. We are implementing additional proxy-level metrics and safeguards to detect and manage similar edge cases earlier.

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