Sorry, I forgot to help you with the troubleshooting. Usually, when slow requests appear in the Ceph status output, running 'ceph tell osd.X dump_historic_ops' allows you to see which I/O operations took a long time to execute. The value of X is reported by the Ceph status. Does 'ceph health detail' provide any useful information, such as an OSD ID?
Regards, Frédéric. [3] https://docs.ceph.com/en/latest/rados/troubleshooting/troubleshooting-osd/#debugging-slow-requests ----- Le 7 Mar 25, à 17:52, Frédéric Nass frederic.n...@univ-lorraine.fr a écrit : > Hi Nicola, > > A quick look in Ceph repository points to this commit [1] and this part [2] of > the documentation. > > I doubt your cluster is actually performing worse than it did before the > update. > It's just that now it's letting you know when performance isn't optimal (when > queries exceed the default threshold). > > Regards, > Frédéric. > > [1] > https://github.com/ceph/ceph/commit/73b80a9a2c38259346fb646f85fa2ba4dcbb1329 > [2] > https://docs.ceph.com/en/latest/rados/operations/health-checks/#block-device-stalled-read-alert > > ----- Le 7 Mar 25, à 17:05, Nicola Mori m...@fi.infn.it a écrit : > >> Dear Ceph users, >> >> after upgrading from 19.2.0 to 19.2.1 (via cephadm) my cluster started >> showing some warnings never seen before: >> >> 29 OSD(s) experiencing slow operations in BlueStore >> 13 OSD(s) experiencing stalled read in db device of BlueFS >> >> I searched for these messages but didn't find much. I also noticed that >> when browsing the CephFS folders (using the kernel module for the >> client) sometimes the client gets stuck for a long time before showing >> the folder content; however I don't know if this can be related to the >> above warnings. >> >> I'd need help to understand what's going on and eventually how to >> troubleshoot it. >> Thanks, >> >> Nicola >> >> _______________________________________________ >> ceph-users mailing list -- ceph-users@ceph.io >> To unsubscribe send an email to ceph-users-le...@ceph.io > _______________________________________________ > ceph-users mailing list -- ceph-users@ceph.io > To unsubscribe send an email to ceph-users-le...@ceph.io _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-le...@ceph.io
