A Tune challenge from Change data capture. A new table needs its first copy, and it has to start now, at lunch, when the shop is busy: 200 changes a second. The copy is slowing checkout to a quarter of a second. Keep the shop within 100 ms, keep search within 10 seconds, and keep the copy moving, changing only settings.
The design you start with: p99 202ms, 0% of requests failing, 154/s answered.