On Thu, May 17, 2018 at 6:06 PM, Uwe Sauter <uwe.sauter.de@xxxxxxxxx> wrote: > Brad, > > thanks for the bug report. This is exactly the problem I am having (log-wise). >>>> >>>> You don't give any indication what version you are running but see >>>> https://tracker.ceph.com/issues/23205 >>> >>> >>> the cluster is an Proxmox installation which is based on an Ubuntu kernel. >>> >>> # ceph -v >>> ceph version 12.2.5 (dfcb7b53b2e4fcd2a5af0240d4975adc711ab96e) luminous >>> (stable) >>> >>> The mistery is that these blocked requests occur numerously when at least >>> one of the 6 servers is booted with kernel 4.15.17, if all are running >>> 4.13.16 the number of blocked requests is infrequent and low. >> >> Sounds like you need to profile your two kernel versions and work out >> why one is under-performing. >> > > Well, the problem is that I see this behavior only in our production system (6 hosts and 22 OSDs total). The test system I have is > a bit smaller (only 3 hosts with 12 OSDs on older hardware) and shows no sign of this possible regression… Are you saying you can't gather performance data from your production system? > > > Regards, > > Uwe -- Cheers, Brad _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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