Difference between revisions of "Iostat"
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| − | + | [[w:iostat|iostat]] (input/output statistics) is a computer system monitor tool used to collect and show operating system storage input and output statistics. | |
| − | == See also == | + | Usage: |
| + | * <code>iostat</code> | ||
| + | * <code>iostat -x</code>, includes among other information <code>%util</code> column. <code>[[linux server administration/sar|sar]] -d</code> also display <code>%util</code> information. | ||
| + | * <code>iostat -xc</code> | ||
| + | |||
| + | Example: <code>iostat -x</code> | ||
| + | <pre> | ||
| + | Linux 4.15.0-66-generic (server_name_1) 01/06/2019 _x86_64_ (12 CPU) | ||
| + | |||
| + | avg-cpu: %user %nice %system %iowait %steal %idle | ||
| + | 26.69 0.09 5.45 2.81 0.00 64.95 | ||
| + | |||
| + | Device r/s w/s rkB/s wkB/s rrqm/s wrqm/s %rrqm %wrqm r_await w_await aqu-sz rareq-sz wareq-sz svctm %util | ||
| + | loop0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.00 0.00 2.49 0.00 0.00 0.00 | ||
| + | loop1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.11 0.00 0.00 10.11 0.00 0.00 0.00 | ||
| + | loop2 0.08 0.00 0.08 0.00 0.00 0.00 0.00 0.00 0.46 0.00 0.00 1.07 0.00 0.01 0.00 | ||
| + | loop3 0.07 0.00 0.07 0.00 0.00 0.00 0.00 0.00 0.23 0.00 0.00 1.03 0.00 0.01 0.00 | ||
| + | loop4 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2.50 0.00 0.00 0.00 | ||
| + | sda 9.24 13.63 61.04 338.74 2.22 5.29 19.36 27.97 0.22 0.37 0.01 6.61 24.85 0.09 0.20 | ||
| + | sdb 62.13 185.19 10293.49 7751.52 0.93 0.95 1.47 0.51 1.70 17.34 3.32 165.69 41.86 0.42 10.46 | ||
| + | sdc 46.22 203.85 9157.51 10073.27 0.91 0.57 1.94 0.28 1.59 17.32 3.60 198.14 49.42 0.44 11.11 | ||
| + | sdd 59.95 9.98 10592.98 9774.97 0.20 3.44 0.34 25.63 1.62 173.61 1.83 176.71 979.46 1.75 12.21 | ||
| + | dm-0 110.19 301.03 19451.00 28437.01 0.00 0.00 0.00 0.00 1.88 7.24 2.39 176.52 94.47 0.44 18.29 | ||
| + | </pre> | ||
| + | |||
| + | ==See also== | ||
| + | * [[hdparm]] | ||
| + | * <code>[[nice]]</code> and <code>[[ionice]]</code> | ||
| + | * <code>[[nmon]]</code> | ||
{{io performance commands}} | {{io performance commands}} | ||
Revision as of 16:16, 8 December 2019
iostat (input/output statistics) is a computer system monitor tool used to collect and show operating system storage input and output statistics.
Usage:
iostatiostat -x, includes among other information%utilcolumn.sar -dalso display%utilinformation.iostat -xc
Example: iostat -x
Linux 4.15.0-66-generic (server_name_1) 01/06/2019 _x86_64_ (12 CPU)
avg-cpu: %user %nice %system %iowait %steal %idle
26.69 0.09 5.45 2.81 0.00 64.95
Device r/s w/s rkB/s wkB/s rrqm/s wrqm/s %rrqm %wrqm r_await w_await aqu-sz rareq-sz wareq-sz svctm %util
loop0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.00 0.00 2.49 0.00 0.00 0.00
loop1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.11 0.00 0.00 10.11 0.00 0.00 0.00
loop2 0.08 0.00 0.08 0.00 0.00 0.00 0.00 0.00 0.46 0.00 0.00 1.07 0.00 0.01 0.00
loop3 0.07 0.00 0.07 0.00 0.00 0.00 0.00 0.00 0.23 0.00 0.00 1.03 0.00 0.01 0.00
loop4 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2.50 0.00 0.00 0.00
sda 9.24 13.63 61.04 338.74 2.22 5.29 19.36 27.97 0.22 0.37 0.01 6.61 24.85 0.09 0.20
sdb 62.13 185.19 10293.49 7751.52 0.93 0.95 1.47 0.51 1.70 17.34 3.32 165.69 41.86 0.42 10.46
sdc 46.22 203.85 9157.51 10073.27 0.91 0.57 1.94 0.28 1.59 17.32 3.60 198.14 49.42 0.44 11.11
sdd 59.95 9.98 10592.98 9774.97 0.20 3.44 0.34 25.63 1.62 173.61 1.83 176.71 979.46 1.75 12.21
dm-0 110.19 301.03 19451.00 28437.01 0.00 0.00 0.00 0.00 1.88 7.24 2.39 176.52 94.47 0.44 18.29
See also
IO performance: iotop, iostat, sar -d, fio, nmon, vmstat -d, dd, nmon, stress
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