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jbodah/disk_bottleneck.sh

Created June 4, 2018 15:32
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how to check for a disk bottleneck
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disk_bottleneck.sh
iostat -xmt 2
# Example output:
06/04/2018 03:29:38 PM
avg-cpu: %user %nice %system %iowait %steal %idle
11.14 0.00 0.75 1.00 0.13 86.98
Device: rrqm/s wrqm/s r/s w/s rMB/s wMB/s avgrq-sz avgqu-sz await svctm %util
xvda 0.00 65.00 18.00 1450.50 0.21 23.29 32.79 6.17 4.20 0.08 11.40
06/04/2018 03:29:40 PM
avg-cpu: %user %nice %system %iowait %steal %idle
6.53 0.00 0.38 30.03 0.25 62.81
Device: rrqm/s wrqm/s r/s w/s rMB/s wMB/s avgrq-sz avgqu-sz await svctm %util
xvda 0.00 22.50 17.00 3377.50 0.24 50.10 30.38 144.65 42.10 0.29 100.00
06/04/2018 03:29:42 PM
avg-cpu: %user %nice %system %iowait %steal %idle
4.41 0.00 0.25 19.42 0.25 75.66
Device: rrqm/s wrqm/s r/s w/s rMB/s wMB/s avgrq-sz avgqu-sz await svctm %util
xvda 0.00 10.00 7.50 3100.00 0.09 45.24 29.87 144.24 46.44 0.32 100.00
06/04/2018 03:29:44 PM
avg-cpu: %user %nice %system %iowait %steal %idle
0.13 0.00 0.13 16.37 0.25 83.12
Device: rrqm/s wrqm/s r/s w/s rMB/s wMB/s avgrq-sz avgqu-sz await svctm %util
xvda 0.00 1.00 0.00 2426.50 0.00 40.34 34.05 111.95 46.82 0.33 79.20
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