# alerts[].when

> Condition, e.g.

Condition, e.g. `logs(service=api, level=error) > 20/min` or `metric(service=web, name=latency_p95) > 800ms for 5m`.

- **Type:** string
- **Required:** yes
- **Since:** manifest v1

## Example

```yaml
alerts:
  - when: logs(service=api, level=error) > 20/min
```

## See also

- [alerts](/docs/manifest/alerts/): all fields of `alerts`
- [guv.yaml reference](/docs/manifest/)