On Saturday, February 12, 2011 12:43:53 pm M. Fioretti wrote: > On Sat, Feb 12, 2011 12:27:55 PM -0600, Rick Sewill (rsew...@gmail.com) wrote: > > Could you show the output of iostat -x 1, > > not iostat -x 1 | egrep -i 'device|sda' > > please? > > Sure, sorry, here you go (this is with Firefox open, right now) > > > Linux 2.6.35.10-74.fc14.x86_64 (polaris.localdomain) 02/12/2011 _x86_64_ (2 > CPU) > > avg-cpu: %user %nice %system %iowait %steal %idle > 28.93 0.00 3.23 0.69 0.00 67.15 > > Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz > avgqu-sz await svctm %util sda 0.76 12.23 1.72 > 2.07 96.94 111.76 54.97 0.10 26.58 4.13 1.57 dm-0 > 0.00 0.00 2.45 13.98 96.65 111.76 12.68 2.18 > 132.68 0.95 1.57 dm-1 0.00 0.00 0.01 0.00 > 0.09 0.00 8.00 0.00 5.45 3.18 0.00 > > avg-cpu: %user %nice %system %iowait %steal %idle > 48.76 0.00 0.50 0.00 0.00 50.75 > > Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz > avgqu-sz await svctm %util sda 0.00 0.00 0.00 > 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-0 > 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 > 0.00 0.00 0.00 dm-1 0.00 0.00 0.00 0.00 > 0.00 0.00 0.00 0.00 0.00 0.00 0.00 > > avg-cpu: %user %nice %system %iowait %steal %idle > 16.58 0.00 1.01 0.00 0.00 82.41 > > Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz > avgqu-sz await svctm %util sda 0.00 0.00 0.00 > 19.00 0.00 152.00 8.00 0.01 0.79 0.11 0.20 dm-0 > 0.00 0.00 0.00 19.00 0.00 152.00 8.00 0.01 > 0.79 0.11 0.20 dm-1 0.00 0.00 0.00 0.00 > 0.00 0.00 0.00 0.00 0.00 0.00 0.00 > > avg-cpu: %user %nice %system %iowait %steal %idle > 4.46 0.00 0.99 4.95 0.00 89.60 > > Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz > avgqu-sz await svctm %util sda 0.00 27.00 0.00 > 9.00 0.00 272.00 30.22 0.07 7.67 7.67 6.90 dm-0 > 0.00 0.00 0.00 34.00 0.00 272.00 8.00 0.10 > 2.82 2.03 6.90 dm-1 0.00 0.00 0.00 0.00 > 0.00 0.00 0.00 0.00 0.00 0.00 0.00 > > avg-cpu: %user %nice %system %iowait %steal %idle > 4.50 0.00 1.00 0.00 0.00 94.50 > > Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz > avgqu-sz await svctm %util sda 0.00 0.00 0.00 > 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-0 > 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 > 0.00 0.00 0.00 dm-1 0.00 0.00 0.00 0.00 > 0.00 0.00 0.00 0.00 0.00 0.00 0.00 > > avg-cpu: %user %nice %system %iowait %steal %idle > 12.87 0.00 0.99 0.00 0.00 86.14 > > Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz > avgqu-sz await svctm %util sda 0.00 0.00 0.00 > 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-0 > 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 > 0.00 0.00 0.00 dm-1 0.00 0.00 0.00 0.00 > 0.00 0.00 0.00 0.00 0.00 0.00 0.00 > > avg-cpu: %user %nice %system %iowait %steal %idle > 39.30 0.00 0.50 0.00 0.00 60.20 > > Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz > avgqu-sz await svctm %util sda 0.00 0.00 0.00 > 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-0 > 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 > 0.00 0.00 0.00 dm-1 0.00 0.00 0.00 0.00 > 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Is there any correlation between avg-cpu %user and Device sda wsec/s writes? Is there a burst of %user cpu activity followed by a burst of wsec/s writes? If the system is doing so little, I'd expect less %user cpu activity. Since the system is 2 CPU, does 48% means one cpu ran solid for a second? Someone help us...I know there is a command to show open files, lsof. Does that command include a way to find out disk activity per file or is there another command that can find out disk activity per file? I'm hoping, if we identify the file(s) with disk activity, we might identify the service/application/kernel feature that is hogging the cpu.
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