Sar (sysstat)
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Revision as of 21:49, 9 November 2013 by Christoph (Talk | contribs) (New page: In computing, <code>`sar`</code> (System Activity Report) is a Solaris-derived system monitor command used to report on various system loads, including CPU activity, memory/paging, device ...)
In computing, `sar` (System Activity Report) is a Solaris-derived system monitor command used to report on various system loads, including CPU activity, memory/paging, device load, network, etc. Linux distributions provide `sar` through the sysstat package.
Utilities
The sysstat package contains the following system performance tools:
sar- collects and reports system activity information
iostat- reports CPU utilization and disk I/O statistics
mpstat- reports global and per-processor statistics
pidstat- reports statistics for Linux tasks (processes)
sadf- displays data collected by sar in various formats
nfsiostat- reports I/O statistics for network filesystems
cifsiostat- reports I/O statistics for CIFS filesystems
The statistics reported by `sar` deal with I/O transfer rates, paging activity, process-related activities, interrupts, network activity, memory and swap space utilization, CPU utilization, kernel activities, and TTY statistics, among others. Both UP and SMP machines are fully supported.
