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Sysstat - The sar, mpstat, and iostat commands
The sysstat package contains the sar, mpstat, and
 iostat commands for Linux. 'Sar' collects and reports system activity
 information; this information can also be saved in a system activity
 file for future inspection. 'Iostat' reports CPU statistics and I/O
 statistics for tty devices and disks such as I/O transfer rates,
 paging activity, process-related activites, interrupts, network
 activity, memory and swap space utilization, CPU utilization, kernel
 activities, and TTY statistics, among others. Sysstat fully supports
 both UP and SMP machines.
Obtaining
DocumentationUser manpages available in HTML format from http://perso.wanadoo.fr/sebastien.godard/
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