Github user bowenli86 commented on the issue:
https://github.com/apache/flink/pull/4656
@tzulitai Thanks, Gordon! I watched your presentation on "managing state of
Flink", and you did a great job explaining all details.
I added an option for PER_REQUEST model since it doesn't hurt anything.
This PR is for 1.4. There's [another PR
here](https://github.com/apache/flink/pull/4657) I think need to be merged to
both 1.4 and 1.3.x---
