# Other Parameters


![left](./student-guide/diagram/07-Other-parameter-01-01.png)
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Other parameters
- patrol-region-interval
Control the interval of the sweep region. The default is 100ms, and usually does not need to be adjusted. If the number of regions is large and you encounter some scenario such as speeding up region merge, node failover replica speed, etc., you can reduce it to 10ms to speed up the patrol region, at the cost of consuming more CPU
- tolerant-size-ratio
Controls the balance region buffer size. After 4.0, the default is 0, which means automatic adjustment, and usually does not need to modify. If you upgrade from version 3.0 or earlier, it will inherit the previous default setting of 5. If you have a large number of regions, a smaller value may cause frequent unnecessary scheduling, such as 100 or change to 0 after the upgrade version.
- region_weight and leader_weight
After PD calculates the region and leader scores, it divides the weight to get the final region and leader scores. The weight parameter defaults to 1, and usually does not need to modify. If necessary, it can be <store_id><leader_weight><region_weight>adjusted through the pd-ctl > store weight command to achieve the purpose of artificially controlling the scheduling direction
- Please refer to the PD Scheduling Parameters Guide for more parameters