# Pusher: Major incident: MT1 cluster - increased latency

**Summary:** Pusher reported major increased latency on Channels cluster \`mt1\`, affecting Channels Dashboard, Channels presence channels, Channels REST API and Channels WebSocket client API. It started at 2025-10-20 17:26 UTC and was resolved at 2025-10-21 07:14 UTC, lasting 13 h 48 min. Pusher attributed the latency to an external cloud-provider incident. _(machine-written, sol)_
- Kind: Major incident · Label: degradation (model (Jev))
- Changed: 2025-10-20 17:26 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/vth06sd5l50v](https://stspg.io/vth06sd5l50v)
- [Company: Pusher](https://rewindex.com/company/pusher.md)
- Versions: before (none: first archived) → after incident\_version:201/x6vysmw5cgwc@854c4a7863df
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ MT1 cluster - increased latency
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2025-10-20 17:26 UTC
```

**5. Added: Resolved time**

```diff
+ 2025-10-21 07:14 UTC
```

**6. Added: Affected components**

```diff
+ Channels Dashboard, Channels presence channels, Channels REST API, Channels WebSocket client API
```

**7. Added: Update** (investigating) · 2025-10-20 17:26 UTC

```diff
+ Our cloud provider is currently experiencing an incident that's causing increased latency on Pusher Channels main cluster ʹmt1ʹ . This issue is external to our systems and is not related to our infrastructure. Our team is actively investigating to determine if there are any additional impacts and working to minimize downstream effects while our provider implements a fix.
```

**8. Added: Update** (resolved) · 2025-10-21 07:14 UTC

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

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2025-10-20 17:26 UTC | Major incident: MT1 cluster - increased latency (this change) | degradation |

All Pusher changes: [timeline](https://rewindex.com/company/pusher/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._


---
Canonical: https://rewindex.com/change/i11a5a85d8c3052 · Markdown: https://rewindex.com/change/i11a5a85d8c3052.md · JSON: https://rewindex.com/api/v1/changes/i11a5a85d8c3052 · Generated 2026-10-18T02:31:48.220Z