Configure disk quota for tile storage
By default, Geoserver can use as much space as needed to store cached tiles. This can cause issues, and it’s recommended to set a limit to the amount of disk space that tiles can use.
Follow these steps to set a disk quota:
- From the main page of the Geoserver web interface, click on the Disk Quota link.   
- Check the Enable disk quota check box.   
- The default space allocated for cached tiles is 500 MiB. If you want to set a different size, enter it in the Maximum tile cache size box. 
- Click the Submit button to save your changes.