[ceph-users] how to set block.db size

hi, how to understand ``Improvements in releases beginning with Nautilus 14.2.12 and Octopus 15.2.6 enable better utilization of arbitrary DB device sizes, and the Pacific release brings experimental dynamic level support. `` in the document ``https://docs.ceph.com/en/quincy/rados/configuration/bluestore-config-ref/#sizing`` is there a related patch??