Comparison of memory use between Heroku's Cedar-14 stack (Ubunt 14.04; left) and Heroku-16 stack (Ubuntu 16.04; right) on this instance with single account running Puma (2 workers with 3 threads) and Sidekiq. Decreases in swap use after a peak seem to be different between stacks. https://mastodon.zunda.ninja/media/9brhqRf0Sz8HbU75F6M
