[ceph-users] slow "rados ls"

Hi One of my clusters running nautilus 14.2.8 is very slow (13 seconds or so where my other clusters are returning almost instantanious) when doing a 'rados --pool rc3-se.rgw.buckets.index ls' from one of the monitors. I checked - ceph status => OK - routing to/from osds ok (I see a lot of established connections to osds due to the command, nothing in syn_sent indicating incomplete handshake) - ping times are OK - no interface errors - no packet drops - no increasing send queus - and as far as I can see nothing out of the ordinary in mon and osd logs I have no clue how to debug the issue. If someone has pointers it would be much appreciated Kind Regards Marcel