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change system cache
Function
The change system cache command is used to set the cache's high and low watermarks. After the high and low watermarks are set, the storage system synchronizes the dirty data from the cache to hard disks based on the settings.
Parameters
Parameter |
Description |
Value |
|---|---|---|
| high_water_level=? | Percentage of the high watermark. | The value is an integer ranging from 2 to 90. |
| low_water_level=? | Percentage of the low watermark. | The value is an integer ranging from 1 to 80. |
Usage Guidelines
- If the watermarks are set improperly, system performance may be affected.
- Before running this command, ensure that the watermarks are set properly. It is recommended that the percentage of the low watermark range from 20 to 40 and that of the high watermark range from 70 to 90.
- The percentage of the high watermark must be greater than that of the low watermark.
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