LINUX Note-iostat command

displaying CPU and I/O statistics

Iostat statistics for all partitions showing CPU and I/O without parameters

-C Display The CPU Utilization report.

-D Display The device utilization report

Linux4.10.0- +-generic (Ubuntu) ,/ to/ ._x86_64_ (2CPU) Avg-CPU:%user% Nice%system%iowait%steal%Idle0.50    0.04    0.38    0.44    0.00   98.64Device:tps Kb_read/s kb_wrtn/s Kb_read kb_wrtnsda1.07        11.15        23.80    1007641    2150292

AVG-CPU segment:
%user: The percentage of CPU that is used to run at the user level.
The percentage of CPU used by the%nice:nice operation.
%sys: The percentage of CPU that is used to run at the system level (kernel).
%iowait:cpu the percentage of CPU that is consumed while waiting for hardware I/O.
%idle:cpu the percentage of idle time.
Device segment:
TPS: The number of I/O requests sent per second.
BLK_READ/S: Number of blocks read per second.
BLK_WRTN/S: Number of blocks written per second.
Blk_read:   The total number of blocks read in.
BLK_WRTN:  Total number of block writes.

LINUX Note-iostat command