Upstash outage, 23 June 2026
QStash EU Region - Degraded Performance
- Started
- Resolved
- 23 Jun 2026, 17:14 UTC (after 52 min)
- Impact
- Minor
- Affected
- EU-CENTRAL-1
Last update from Upstash
### **Summary** On June 23, 2026, QStash users in the EU-CENTRAL-1 region experienced elevated latency and degraded performance. The issue was caused by a regression introduced in a recent enhancement to Flow Control scheduling logic. The change increased resource consumption under load, leading to reduced performance on affected shards. The incident was resolved by rolling back to the previous stable version. ### **Impact** * Service: QStash \(EU-CENTRAL-1\) * Start: 2026-06-23 16:22 UTC * Resolved: 2026-06-23 17:14 UTC * Duration: ~52 minutes * Impact: Increased latency and degraded performance for workloads routed to the affected instance in the EU. Multiple customers in the region exp...
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