title: Limited time when using local cache in AWS CodeBuild?
body: <p>I am trying to use the Docker layer cache in AWS CodeBuild. I have seen the effect when using it to reduce the time when building or pulling Docker image, but I found that it can only use local cache in a certain time period (about less than 1 hour). I have not seen any document about this. </p>
  
  <p>Where did I get confused or do I have a way to set up the cache storage time?</p>
  
  <p><a href="https://docs.aws.amazon.com/codebuild/latest/userguide/build-caching.html" rel="nofollow noreferrer">Build caching in CodeBuild</a></p>