[ceph-users] rgw lifecycle process is not fast enough

ceph version: 14.2.5 (ad5bd132e1492173c85fda2cc863152730b16a92) nautilus (stable) I set up a ceph cluster and I'm uploading objects through rgw with a speed of 60 objects/s. I added some lifecycle rules to buckets so that my disks will not be used up. However, after I set "debug_rgw" to 5 and run `radosgw-admin lc process`, I found from the logs that the deletion is not parallel (only objects in one bucket is deleted in the same time) and speed is much slower than my upload speed (60 objects/s), the disk usage is still growing bigger and bigger. Could you please tell me what should I do to speed up the lifecycle process? Thanks in advance!