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# Memory

Configure a memory balloon device to change the allocated memory for the guest system.

## Topics

### Configuration

[`class VZVirtioTraditionalMemoryBalloonDeviceConfiguration`](/documentation/Virtualization/VZVirtioTraditionalMemoryBalloonDeviceConfiguration)

A configuration object that provides a way to reclaim memory from the guest system.

[`class VZMemoryBalloonDeviceConfiguration`](/documentation/Virtualization/VZMemoryBalloonDeviceConfiguration)

The common configuration traits for memory balloon devices.

### Memory balloon devices

[`class VZVirtioTraditionalMemoryBalloonDevice`](/documentation/Virtualization/VZVirtioTraditionalMemoryBalloonDevice)

The object you use to change the amount of memory allocated to the guest system.

[`class VZMemoryBalloonDevice`](/documentation/Virtualization/VZMemoryBalloonDevice)

The common behavior for memory devices.


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