More ActiveRecord connection pool debugging

A follow-up to my recent video on the same topic: https://www.youtube.com/watch?v=XOfELjqm188 In this video we dive deeper into how connection pools are configured and inspected in Rails applications. Did you find this helpful? Confusing? I'd love to hear what you think! https://twitter.com/adamlogic/status/1164246542406041600 Here's the Rails issue mentioned in the video: https://github.com/rails/rails/issues/36559