[Dynamic Regions] Bucket flow report triggers much faster region split than before. #14333
Description
Bug Report
What version of TiKV are you using?
nightly commit hash# 6a906da
What operating system and CPU are you using?
Steps to reproduce
Enable partitioned-raft-kv and run sysbench insert
What did you expect?
Region split will be stable and slow
What did happened?
Region split is about 100 per minutes. And many tikv requests failed and grpc latency is very high.