On Tue, Nov 01, 2016 at 07:02:02AM +0000, pillai bs wrote: > Hi Experts, > > > Is there a possible way to monitor CPU Util for the drbd resource. > Actually am getting cent percent utilization even i dont have much > load. > > Am maintaining my setup with three blocks one for Data, other for > configurations and the other for logs which was logically mounted.
DRBD version? The stats you present below look like the "queue length" is misaccounted. Our iostats had some problems in the past, potentially producing such bogus results. Also, even when correct, %util may not be what you think it is. %100 util does not mean it cannot take any more. It only means that "most of the time" a new request is submitted before previous requests have been completed, or maybe "back to back" with the completion. Depending on usage patterns, and network and IO backend latencies, 100% util may even be expected. > [root@pcpha-dev-01 ~]# iostat -x 5 | grep drbd > drbd0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 > 858980.47 0.00 0.00 99.94 > drbd1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 > 101.94 0.00 0.00 99.94 > drbd2 0.00 0.00 0.00 0.80 0.00 3.20 4.00 > 858935.49 0.25 1249.25 99.94 > drbd0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 > 858980.46 0.00 0.00 100.00 > drbd1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 > 102.00 0.00 0.00 100.00 > drbd2 0.00 0.00 0.00 2.80 0.00 19.20 6.86 > 858935.46 0.07 357.14 100.00 > > [xxxx@xxxx]# iostat -x -d > Linux 2.6.32-431.el6.x86_64 (xxxx) 10/31/2016 _x86_64_ (4 > CPU) > > Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz > avgqu-sz await svctm %util > sda 0.00 0.86 0.01 1.67 10.96 > 20.22 18.50 0.00 0.73 0.41 0.07 > dm-0 0.00 0.00 0.00 0.02 0.05 0.12 > 9.97 0.00 9.66 1.99 0.00 > dm-1 0.00 0.00 0.00 0.00 0.00 0.00 > 8.00 0.00 2.14 0.82 0.00 > dm-2 0.00 0.00 0.00 0.02 0.02 0.12 > 9.22 0.00 1.97 0.01 0.00 > dm-3 0.00 0.00 0.00 0.78 0.00 6.23 > 8.00 0.00 0.48 0.21 0.02 > dm-4 0.00 0.00 0.00 0.00 0.00 0.00 > 7.99 0.00 3.30 2.89 0.00 > dm-5 0.00 0.00 0.00 0.48 0.01 3.85 > 8.01 0.00 0.64 0.22 0.01 > dm-6 0.00 0.00 0.00 0.01 0.00 0.04 > 8.00 0.00 24.47 0.02 0.00 > dm-7 0.00 0.00 0.01 0.03 6.50 0.21 > 205.25 0.00 37.54 1.13 0.00 > dm-8 0.00 0.00 0.00 0.02 2.21 0.15 > 109.64 0.00 9.22 0.89 0.00 > dm-9 0.00 0.00 0.00 1.19 2.17 9.50 > 9.81 0.00 0.65 0.31 0.04 > drbd0 0.00 0.00 0.00 0.01 0.00 0.08 > 8.00 0.20 421.71 10481.54 10.45 > drbd1 0.00 0.00 0.00 0.01 0.00 0.07 > 7.95 0.06 76.94 12030.16 10.49 > drbd2 0.00 0.00 0.00 0.56 0.00 3.26 > 5.85 0.15 0.61 176.92 9.87 > > [xxxx@xxxx]# iostat -x 5 /dev/vg1/lvdblog > Linux 2.6.32-431.el6.x86_64 (xxxx) 10/31/2016 _x86_64_ (4 > CPU) > > > avg-cpu: %user %nice %system %iowait %steal %idle > 2.21 0.00 0.75 0.00 0.00 97.04 > > Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz > avgqu-sz await svctm %util > dm-9 0.00 0.00 0.00 1.60 0.00 12.80 8.00 > 0.00 1.00 0.62 0.10 -- : Lars Ellenberg : LINBIT | Keeping the Digital World Running : DRBD -- Heartbeat -- Corosync -- Pacemaker DRBD® and LINBIT® are registered trademarks of LINBIT __ please don't Cc me, but send to list -- I'm subscribed _______________________________________________ drbd-user mailing list [email protected] http://lists.linbit.com/mailman/listinfo/drbd-user
