Hi, engineers. PMC (project management committee) member of Apache Doris here. (If you have never heard of Apache Doris, it is an analytic database.) We recently summarize our efforts in improving query concurrency in this writeup: https://dev.to/apachedoris/30000-qps-per-node-how-we-increas... We've been trying to handle both high-throughput and high-concurrency queries on one single platform, and we are kinda proud of what we have achieved, but we also want some input from HN, like do you think 30,000 per node is competitive enough, and most importantly, do you see any room for improvement in these 9 methods?