Linux System Performance analysis tool sar--system Activity Report

1. Conclusion:

The SAR command is a common tool for analyzing system performance on Linux systems, and can be used to view CPU, memory, disk IO, file read and write, system calls,

2, the SAR will have a scheduled task, regularly record the current system information to/VAR/LOG/SA/XX, the default is to record every 10 minutes, when the SAR command does not specify the interval and number of times, is to display historical data.

The SAR can also specify real-time statistics intervals and statistics times.

3, sar-p or mpstat can display the current statistics on multicore CPUs.

Reference:

Http://m.codesky.net/article/mip/201705/184891.html

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Linux System Performance analysis tool sar--system Activity Report