sar

Monitor performance of various Linux subsystems.

• Report I/O and transfer rate issued to physical devices, one per second (press CTRL+C to quit):

sar -b {1}

• Report a total of 10 network device statistics, one per 2 seconds:

sar -n DEV {2} {10}

• Report CPU utilization, one per 2 seconds:

sar -u ALL {2}

• Report a total of 20 memory utilization statistics, one per second:

sar -r ALL {1} {20}

• Report the run queue length and load averages, one per second:

sar -q {1}

• Report paging statistics, one per 5 seconds:

sar -B {5}

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