====== iostat ====== ---- dataentry analysisTool ---- name : iostat features_ttags : monitoring layers_ttags : operating system, block device version : 11.2.1.1 (2016-02-21) webpage_url : http://sebastien.godard.pagesperso-orange.fr/ license_ttag : GPLv2 ---- iostat reports the accumulated device usage rather than collecting it on a process- or thread-basis. Reads and writes are broken down by block-device. Together with other tools, such as sar, iostat is part of the sysstat collection. ===== Usage ===== iostat is used by specifying an interval measurements are taken at as a positional argument ''iostat 2'' will display a new measurement every 2 seconds. Extended statistics can be requested using the ''-x'' option. Each of the data-fields is documented in the ''iostat'' man page. ===== Output ===== For each interval two data blocks are shown, the first one shows the CPU usage (averaged over all CPUs) while the second shows the usage of each block device. Linux 4.4.3-1-ARCH (your-hostname) 03/10/2016 _x86_64_ (8 CPU) avg-cpu: %user %nice %system %iowait %steal %idle 13.25 0.24 2.37 0.04 0.00 84.10 Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn sda 12.08 81.48 1538.83 947077 17886516 sdc 0.03 0.58 0.01 6777 80 sdb 0.01 0.47 0.00 5432 0 avg-cpu: %user %nice %system %iowait %steal %idle 7.46 0.00 12.85 0.00 0.00 79.69 Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn sda 0.00 0.00 0.00 0 0 sdc 0.00 0.00 0.00 0 0 sdb 0.00 0.00 0.00 0 0 avg-cpu: %user %nice %system %iowait %steal %idle 7.63 0.00 12.77 0.00 0.00 79.60 Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn sda 1.00 0.00 24.00 0 48 sdc 0.00 0.00 0.00 0 0 sdb 0.00 0.00 0.00 0 0 ===== Similar tools ===== ---- datarelated ---- cols : features, layers max : 5 sort : ^name ----