Changes / Upstash / Region ap-northeast-1 outage on Upstash Global
Upstash: Critical incident: Region ap-northeast-1 outage on Upstash Global
Summary
Upstash reported a critical outage affecting Redis Global in Tokyo, Japan (ap-northeast-1), causing elevated latency and connection errors for some databases. The incident ran from 2026-03-06 13:50 UTC to 2026-03-06 14:49 UTC (59 min). A traffic spike increased network utilization and connection load; Upstash mitigated it by scaling regional capacity and redistributing load across additional nodes.
Machine-written from the diff below (Sol; type: incident outage). Check the diff before relying on it.
What changed
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After: Region ap-northeast-1 outage on Upstash Global
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After: critical
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After: postmortem
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After: 2026-03-06 13:50 UTC
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After: 2026-03-06 14:49 UTC
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After: Redis Global - Tokyo, Japan (ap-northeast-1), Tokyo, Japan (ap-northeast-1)
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After: We are currently investigating this issue.
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After: A fix has been implemented and we are monitoring the results.
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After: This incident has been resolved.
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After: On March 6, between approximately 13:44–14:07 UTC, some databases experienced elevated latency and connection errors in the Tokyo \(ap-northeast-1\) region.
The issue was caused by a sudden spike in traffic that significantly increased network utilization and connection load on a subset of nodes.
Our team mitigated the incident by scaling up capacity in the region and redistributing load across additional nodes. Service recovered once the additional capacity was brought online.
Resolution
We have increased the number of machines in the Tokyo region to provide additional headroom and reduce the likelihood of similar incidents during traffic spikes.
Next Steps
We are continuing to review capacity safeguards and connection-handling limits to improve resilience against sudden traffic surges.
First version of this incident archived by Rewindex. View the live incident (opens in new tab).
History of this incident
| When (UTC) | Change | Kind |
|---|---|---|
| Critical incident: Region ap-northeast-1 outage on Upstash Global (this change) Upstash reported a critical outage affecting Redis Global in Tokyo, Japan (ap-northeast-1), causing elevated latency and connection errors for some databases. The incident ran from 2026-03-06 13:50 UTC to 2026-03-06 14:49 UTC (59 min). A traffic spike increased network utilization and connection load; Upstash mitigated it by scaling regional capacity and redistributing load across additional nodes. | Major incident |