[root@r83x6u16 ~]# ceph tell osd.* injectargs '--osd-op-threads 4'
osd.0: osd_op_threads = '4'
osd.1: osd_op_threads = '4'
osd.2: osd_op_threads = '4'
osd.3: osd_op_threads = '4'
osd.4: osd_op_threads = '4'
osd.5: osd_op_threads = '4'
osd.6: osd_op_threads = '4'
osd.7: osd_op_threads = '4'
osd.8: osd_op_threads = '4'
[root@r83x6u16 ~]#
[root@r83x6u16 ~]# ceph --admin-daemon /var/run/ceph/ceph-osd.0.asok config show | less