# Langfuse: Slow trace data retirival across API and UI in EU

- Provider: [Langfuse](https://outages.cc/langfuse.md)
- Type: Incident
- State: Resolved
- Worst impact: Degraded performance
- Started: 2026-10-21 07:46 UTC
- Resolved: 2026-10-21 08:45 UTC (lasted 59 min)
- Official update: https://status.langfuse.com

## Updates from Langfuse

### resolved, 2026-10-21 09:39 UTC

should be finally resolved

### monitoring, 2026-10-21 08:56 UTC

Looks like some timeout are still occurring. Monitoring.

### resolved, 2026-10-21 08:45 UTC

All replicas look healthy again

### identified, 2026-10-21 08:31 UTC

Slow clickhouse read replicas affecting performance across the service. Draining and replacing them.

### investigating, 2026-10-21 07:46 UTC

Slow traces data serving across API and UI