# Typical Scenarios For Pd Scheduling

+ Uneven distribution of Leaders/Regions
+ TiKV nodes are slow to go offline
+ The TiKV node is slow to go online
+ Uneven Region of hot regions
+ Region Merge is slow
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After understanding the scheduler limit and configuration parameters related to PD scheduling, let's focus on the following scenario to analyze the phenomenon of the problem, the cause of the problem, and the corresponding treatment plan:

- Uneven distribution of Leaders/Regions
- TiKV nodes are slow to go offline
- The TiKV node is slow to go online
- Uneven Region of hot regions
- Region Merge is slow