# Disk Capacity Impact Pd Scheduling Performance Case - Monitoring Analysis

+ Grafana PD —> Scheduler - Balance region event  
  + Observation: Balance region operations occur frequently


![left](./student-guide/diagram/03-31-1.png)

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Grafana PD —> Scheduler - Balance region event can determine if there is a problem caused by the scheduling of PD, and the region is unstable on November 10 in the above figure, causing PD Scheduler to schedule the balance region frequently