Upstash incident
Region ap-northeast-1 outage on Upstash Global
Upstash experienced a critical incident on March 6, 2026 affecting Tokyo, Japan (ap-northeast-1), lasting 59m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Mar 06, 2026, 01:50 PM UTC
We are currently investigating this issue.
- monitoring Mar 06, 2026, 02:08 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Mar 06, 2026, 02:49 PM UTC
This incident has been resolved.
- postmortem Mar 09, 2026, 10:07 AM UTC
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.