---
title: critical
framework: avfoundation
role: symbol
role_heading: Type Property
path: avfoundation/avcapturedevice/systempressurestate-swift.class/level-swift.struct/critical
---

# critical

System pressure is critically elevated.

## Declaration

```swift
static let critical: AVCaptureDevice.SystemPressureState.Level
```

## Discussion

Discussion Capture quality and performance are significantly impacted. Reduce the frame rate until system pressure state improves.

## See Also

### System pressure levels

- [nominal](avfoundation/avcapturedevice/systempressurestate-swift.class/level-swift.struct/nominal.md)
- [fair](avfoundation/avcapturedevice/systempressurestate-swift.class/level-swift.struct/fair.md)
- [serious](avfoundation/avcapturedevice/systempressurestate-swift.class/level-swift.struct/serious.md)
- [shutdown](avfoundation/avcapturedevice/systempressurestate-swift.class/level-swift.struct/shutdown.md)