https://hodalog.com/use-sar-command-in-debian/
https://www.linuxtechi.com/generate-cpu-memory-io-report-sar-command/
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Download ksar https://github.com/vlsi/ksar/releases/tag/v5.2.4
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Usage of ksar
https://www.cyberciti.biz/tips/identifying-linux-bottlenecks-sar-graphs-with-ksar.html