Hi, I'm experiencing the same issue with this setting in ceph.conf: osd op queue = wpq osd op queue cut off = high Furthermore I cannot read any old data in the relevant pool that is serving CephFS. However, I can write new data and read this new data. Regards Thomas Am 24.09.2019 um 10:24 schrieb Yoann Moulin: > Hello, > >>> I have a Ceph Nautilus Cluster 14.2.1 for cephfs only on 40x 1.8T SAS disk (no SSD) in 20 servers. >>> >>> I often get "MDSs report slow requests" and plenty of "[WRN] 3 slow requests, 0 included below; oldest blocked for > 60281.199503 secs" >>> >>> After a few investigations, I saw that ALL ceph-osd process eat a lot of memory, up to 130GB RSS each. It this value normal? May this related to >>> slow requests? Is disk only increasing the probability to get slow requests? >> If you haven't set: >> >> osd op queue cut off = high >> >> in /etc/ceph/ceph.conf on your OSDs, I'd give that a try. It should >> help quite a bit with pure HDD clusters. > OK I'll try this, thanks. > > If I want to add this my ceph-ansible playbook parameters, in which files I should add it and what is the best way to do it ? > > Add those 3 lines in all.yml or osds.yml ? > > ceph_conf_overrides: > global: > osd_op_queue_cut_off: high > > Is there another (better?) way to do that? > > Thanks for your help. > > Best regards, > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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