理解iostat in Linux

• iostat

  The iostat is a part of the sysstat package, which is really just a file that is read by a certain set of tools. So to install iostat, issue the command:

  sudo apt install sysstat
  

  返回参数详解。

  iostat command generally generates two reports:

  • CPU utilization report
  • All disks i/o statistics report

  To generate the reports, iostat command reads some of the system files:

  • /proc/diskstats for disk stats
  • /proc/stat for system stats
  • /sys for blcok device stats
  • /proc/devices for persistent device names
  • /proc/self/mountstats for all the network filesystems
  • /proc/uptime for information regarding system uptime

• Refereneces

1. Linux Tools Quick Tutorial: iostat 监视I/O子系统
2. Linux manual page: iostat(1)
3. GeeksforGeeks: iostat command in Linux with examples
4. Linux Techi: How to monitor Linux systems performance with iostat commnd