Enhancement Task

Performed a concurrency test involving 4000 keyspaces on the cluster and observed system behavior.

• PD API:

  • CPU usage increased, but not fully saturated

• TSO:

  • Primary frequently switched
  • CPU usage increased noticeably

• gRPC:

  • Noticeable increase in several requests: Range, GetClusterInfo, GetMembers (PD), MemberList (etcd client)

• PD etcd :

  • etcd disk requests significantly increased
  • etcd observed repeated raft re-elections
  • In trace.go, two keys had the largest request volume: gcworker/saved_safe_point, tidb/server/info
  • TSO Encountered save ts error, further affecting ts

• Unexpected HTTP responses:

  • GetMinResolvedTs and GetAllRestores not as expected.