---
title: kCVOpenGLESTextureCacheMaximumTextureAgeKey
framework: corevideo
role: symbol
role_heading: Global Variable
path: corevideo/kcvopenglestexturecachemaximumtextureagekey
---

# kCVOpenGLESTextureCacheMaximumTextureAgeKey

By default, textures will age out after one second. Setting a maximum texture age of zero will disable the age-out mechanism completely. The CVOpenGLESTextureCacheFlush(_:_:) function can be used to force eviction in either case.

## Declaration

```swift
let kCVOpenGLESTextureCacheMaximumTextureAgeKey: CFString
```