# 写热点打散 - 业务运行过程中（C）

![left](./student-guide/diagram/21-during-business-operation-03-01.png)

-------------------------------------------------------------

- 通过流量可视化菜单 ，可以定位目标 Region ID  
          pd-ctl region key {start_key}
- 分裂 Region
          pd-ctl operator add split-region {region_id} --policy=approximate
- transfter 分裂出的新 region 到其他 store
        - 通过 pd.log 过滤出 split 后的新 region id
        - transfter 到资源利用率相对较低的 store 
                - operator add add-peer {new_region_id} {target_store_id}
                - operator add transfer-leader {new_region_id} {target_store_id}
                - operator add remove-peer {new_region_id} {original_store_id}
```
SPLIT TABLE table_name INDEX idx_name BETWEEN () AND () REGIONS n;
```