You might want to check out their columnar compression & their continuous aggregate blog posts:
https://www.timescale.com/blog/timescaledb-2-3-improving-col...
https://www.timescale.com/blog/massive-scale-for-time-series...
https://www.timescale.com/blog/timescaledb-2-3-improving-col...
https://www.timescale.com/blog/massive-scale-for-time-series...
Their Slack is very responsive too, top service.