schema_version: 1
id: tikv-node-slowdown-during-incident-window
title: TiKV node slowdown investigation
status: active
owner: codex
evaluation:
  mode: full_diagnosis
environment:
  profile: stable-dedicated
  cluster_label: saas01
  cluster_id: '10989049060142230334'
  cluster_type: dedicated
  tidb_version: v8.5.x
time_window:
  incident_at: '2026-06-22T03:02:30Z'
  allowed:
  - id: fixed_five_minute_window
    start: '2026-06-22T03:00:00Z'
    end: '2026-06-22T03:05:00Z'
prompt:
  text: 请帮我分析集群 10989049060142230334 在 2026-06-22T03:00:00Z 到 2026-06-22T03:05:00Z 这个时间窗内发生了什么。业务侧反馈这段时间 `db-tikv-9` 相关查询明显变慢。请判断最可能的根因，并给出关键证据链、影响判断和处理建议。
tags:
- tikv
- flow-control
- backpressure
- latency-stall
- single-node-scope
case_tier: P1
cost_tier: low
followup:
  scheduled_max_followups: 0
execution:
  acp_bash_timeout_s: 300