---
title: writtenByteCount
framework: virtualization
role: symbol
role_heading: Instance Property
path: virtualization/vzvirtioqueueelement/writtenbytecount
---

# writtenByteCount

The size of the write buffers memory exposed (in bytes) by the Virtio queue element that has already been written to.

## Declaration

```swift
var writtenByteCount: Int { get }
```

## Discussion

Discussion This value increases as you write memory to the write buffers. This value is initially equal to 0.