# Lightdash: Major incident: Lightdash Cloud instability (slow response times)

**Summary:** Lightdash Cloud (US) experienced major API degradation affecting all users, with actions taking minutes or not executing. It started at 2023-05-09 13:48 UTC and was resolved at 2023-05-09 15:33 UTC; the computed duration was 1 h 44 min. Lightdash reported increasing server count and size as its initial response. _(machine-written, sol)_
- Kind: Major incident · Label: degradation (model (Jev))
- Changed: 2023-05-09 13:48 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/sz5dsbj4ywvq](https://stspg.io/sz5dsbj4ywvq)
- [Company: Lightdash](https://rewindex.com/company/lightdash.md)
- Versions: before (none: first archived) → after incident\_version:68/6dqc20m9s28m@1741f57f04fa
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Lightdash Cloud instability (slow response times)
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ postmortem
```

**4. Added: Start time**

```diff
+ 2023-05-09 13:48 UTC
```

**5. Added: Resolved time**

```diff
+ 2023-05-09 15:33 UTC
```

**6. Added: Affected components**

```diff
+ Lightdash Cloud - Lightdash Cloud (US), Lightdash Cloud (US)
```

**7. Added: Update** (investigating) · 2023-05-09 13:48 UTC

```diff
+ The Lightdash API a https://app.lightdash.cloud is experiencing very slow response times for all users, leading to some actions taking minutes or not executing. We're currently investigating.
```

**8. Added: Update** (monitoring) · 2023-05-09 15:22 UTC

```diff
+ We are monitoring performance
```

**9. Added: Update** (resolved) · 2023-05-09 15:33 UTC

```diff
+ This incident has been resolved.
```

**10. Added: Update** (postmortem) · 2023-05-09 15:34 UTC

```diff
+ Today at 13:37 \(UTC\) we noticed that all API endpoints for [https://app.lightdash.cloud](https://app.lightdash.cloud) were starting to run very slow. This was affecting all users and led to response times of over a minute for the API. Our first response was to greatly increase the amount of resources available for the Lightdash server \(both the number and size of servers\). After this change all services remained stable. We have investigated our logs to understand exactly what actions user’s were taking to make the server so busy. In addition to the volume of users, we noticed a higher number than usual of Databricks users. We already have a fix in testing for improved Databricks performance, which can be expected in the coming hours. For further performance improvements you can follow this milestone in GitHub: [https://github.com/lightdash/lightdash/milestone/91](https://github.com/lightdash/lightdash/milestone/91)
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2023-05-09 13:48 UTC | Major incident: Lightdash Cloud instability (slow response times) (this change) | degradation |

All Lightdash changes: [timeline](https://rewindex.com/company/lightdash/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/i44983a96f74baf · Markdown: https://rewindex.com/change/i44983a96f74baf.md · JSON: https://rewindex.com/api/v1/changes/i44983a96f74baf · Generated 2026-10-18T03:55:44.621Z