tldr/pages/linux/sar.md

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# sar
> Monitor performance of various Linux subsystems.
> More information: <https://manned.org/sar>.
- 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}}`