iostat - Monitor input/output device load

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The iostat command monitors system input/output device load by observing the time that the devices are active in relation to their average transfer rates.
The iostat report shows:
  • CPU utilization
  • Device queue information
  • Service time

Authorization

Root access is required on Linux® operating systems.

Syntax

See the iostat man page for the complete syntax and all options.
Read syntax diagramSkip visual syntax diagramiostat options intervalcount

Parameters

-c
Collects CPU statistics.
-d
Collects disk statistics.
-t
Prints a time stamp for each report.
-k
Displays statistics in kilobytes per seconds instead of blocks per second.
-x
Displays extended statistics, if available.

Examples

To generate a report with a sampling interval of 10 seconds, collecting disk statistics in KB per second, including a time stamp, and extended statistics, issue the command:

[root@system]#  iostat -dtkx 10