tldr/pages/linux/sar.md

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}}