do you have "Enterprise" grade disks in your machine? We saw a lot of %b and %w associated with "Consumer" Seagate disks ... not all the time, and not for over a year in production, but once it started happening across multiple servers we cottoned on pretty quickly.
On 10 October 2013 21:39, jason matthews <ja...@broken.net> wrote: > > I am not sure when reporting zpool stats was introduced into iostat but i > love it. however, i am not sure what to make of it. > > For instance, what does a wsvc time of 20 seconds tell me? seems like my > queue is too big but that is not reflected in individual device statistics. > in the case of zpools, is this some sort of reflection on transaction > groups? > > can anyone explain why i see such large time associated with zpool in the > iostat output? > > thanks, > j. > > extended device statistics > r/s w/s Mr/s Mw/s wait actv wsvc_t asvc_t %w %b > device > 0.0 3958.7 0.0 300.7 0.1 18.8 0.0 4.7 0 > 153 c3 > 0.0 11.8 0.0 0.1 0.0 0.0 0.0 0.6 > 0 0 c3t55CD2E400012A66Cd0 > 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 > 0 0 c3t55CD2E400012B753d0 > 0.0 2679.7 0.0 149.1 0.1 9.9 0.0 3.7 5 > 80 c3t50015178F36579E8d0 > 0.0 1267.2 0.0 151.5 0.0 8.8 0.0 7.0 3 > 73 c3t50015178F3657B74d0 > 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 > 0 0 c3t50015178F3657AECd0 > 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 > 0 0 c3t50015178F36579E1d0 > 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 > 0 0 c3t50015178F3657B85d0 > 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 > 0 0 c3t50015178F36579BAd0 > 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 > 0 0 c3t50015178F3657A05d0 > 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 > 0 0 c3t50015178F36579FEd0 > 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 > 0 0 c5 > 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 > 0 0 c5t4d0 > 0.0 3946.1 0.0 300.6 80582.9 26.2 20421.0 6.6 88 89 data > 0.0 11.6 0.0 0.1 0.0 0.0 1.1 0.8 0 0 rpool > > > _______________________________________________ > OpenIndiana-discuss mailing list > OpenIndiana-discuss@openindiana.org > http://openindiana.org/mailman/listinfo/openindiana-discuss > _______________________________________________ OpenIndiana-discuss mailing list OpenIndiana-discuss@openindiana.org http://openindiana.org/mailman/listinfo/openindiana-discuss