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

**Summary:** _summary pending_
- Kind: Incident update · Label: Normal progress (rule)
- Changed: 2026-10-21 08:33 UTC · Detected: 2026-10-21 08:33 UTC
- [Source: https://status.langfuse.com/incidents/01M5EPTJX79TDVMB07KQV902HH](https://status.langfuse.com/incidents/01M5EPTJX79TDVMB07KQV902HH)
- [Company: Langfuse](https://rewindex.com/company/langfuse.md)
- Versions: before incident\_version:679/01M5EPTJX79TDVMB07KQV902HH@06bdf33d826d → after incident\_version:679/01M5EPTJX79TDVMB07KQV902HH@54f2289f528d
- Change 1 of 4 for this incident

Incident page (full timeline): [Slow trace data retirival across API and UI in EU](https://rewindex.com/company/langfuse/incidents/01M5EPTJX79TDVMB07KQV902HH.md)
## What changed

**1. Changed: Status**

```diff
- investigating
+ identified
```

**2. Added: Update** (identified) · 2026-10-21 08:31 UTC

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

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-10-21 08:33 UTC | Incident updated: Slow trace data retirival across API and UI in EU (this change) | Normal progress |
| 2026-10-21 08:53 UTC | [Incident updated: Slow trace data retirival across API and UI in EU](https://rewindex.com/change/r12c0e4347f18f8.md) | Normal progress |
| 2026-10-21 09:03 UTC | [Incident updated: Slow trace data retirival across API and UI in EU](https://rewindex.com/change/rf5d88f1b08338c.md) | Normal progress |
| 2026-10-21 09:43 UTC | [Incident updated: Slow trace data retirival across API and UI in EU](https://rewindex.com/change/r4972a205f09b69.md) | Normal progress |

Next: [change](https://rewindex.com/change/r12c0e4347f18f8.md) · All Langfuse changes: [timeline](https://rewindex.com/company/langfuse/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


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Canonical: https://rewindex.com/change/rd0787bfdde7cc3 · Markdown: https://rewindex.com/change/rd0787bfdde7cc3.md · JSON: https://rewindex.com/api/v1/changes/rd0787bfdde7cc3 · Generated 2026-10-22T01:26:53.002Z