[ceph-users] Ceph OSD perf metrics missing

Hi, i'm running a Ceph v18.2.4 cluster. I'm trying to build some latency monitoring with the ceph daemon osd.4 perf dump cli command. On most of the OSDs i get all the metrics i need. On some OSDs i only get zero values: osd.op_latency.avgcount: 0 I already tried restarting the OSD process which didn't help. I also tried to reset the metrics via ceph daemon osd.4 perf reset all but that didn't help either. How can that be that some OSDs don't show values here? How can i fix that? Thanks Regards, Kilian