On 20 June 2016 at 09:21, Blair Bethwaite <blair.bethwaite@xxxxxxxxx> wrote: > slow request issues). If you watch your xfs stats you'll likely get > further confirmation. In my experience xs_dir_lookups balloons (which > means directory lookups are missing cache and going to disk). Murphy's a bitch. Today we upgraded a cluster to latest Hammer in preparation for Jewel/RHCS2. Turns out when we last hit this very problem we had only ephemerally set the new filestore merge/split values - oops. Here's what started happening when we upgraded and restarted a bunch of OSDs: https://au-east.erc.monash.edu.au/swift/v1/public/grafana-ceph-xs_dir_lookup.png Seemed to cause lots of slow requests :-/. We corrected it about 12:30, then still took a while to settle. -- Cheers, ~Blairo -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
