----- Den 26.okt.2016 14:41 skrev Sage Weil [email protected]: > On Wed, 26 Oct 2016, Trygve Vea wrote: >> Hi, >> >> We have two Ceph-clusters, one exposing pools both for RGW and RBD >> (OpenStack/KVM) pools - and one only for RBD. >> >> After upgrading both to Jewel, we have seen a significantly increased CPU >> footprint on the OSDs that are a part of the cluster which includes RGW. >> >> This graph illustrates this: http://i.imgur.com/Z81LW5Y.png > > That looks pretty significant! > > This doesn't ring any bells--I don't think it's something we've seen. Can > you do a 'perf top -p `pidof ceph-osd`' on one of the OSDs and grab a > snapshot of the output? It would be nice to compare to hammer but I > expect you've long since upgraded all of the OSDs...
# perf record -p 18001 ^C[ perf record: Woken up 57 times to write data ] [ perf record: Captured and wrote 18.239 MB perf.data (408850 samples) ] This is a screenshot of one of the osds during high utilization: http://i.imgur.com/031MyIJ.png Link to download binary format sent directly to you. Your expectation about upgrades is correct. We actually had some problems performing the upgrade, so we ended up re-initializing the osds as empty and backfill into jewel. When we first started them on jewel, they ended up blocking I want to add that the resource usage isn't flat - this is a day graph of one of the osd servers: http://i.imgur.com/MLfoVgE.png Regards -- Trygve Vea _______________________________________________ ceph-users mailing list [email protected] http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
