[ceph-users] how to set rgw parameters in Pacific

Hi, I have some doubts regarding the best way to change some rgw parameters in Pacific. Let's say I want to change rgw_max_put_size and some rgw_gc default values like rgw_gc_max_concurrent_io.  What is the recommended way to do it :  - via 'ceph config set global' or - via 'ceph config set client.rgw'   ? Thanks.