The sysstat package contains the sar, sadf, iostat, mpstat, and pidstat commands for Linux. The sar command collects and reports system activity information. The statistics reported by sar concern 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. The sadf command may be used to display data collected by sar in various formats. The iostat command reports CPU statistics and I/O statistics for tty devices and disks. The pidstat command reports statistics for Linux processes. The mpstat command reports global and per-processor statistics.
License: GNU General Public License (GPL)
Changes:
A major rewrite was done to sysstat. The sar, sadc
and sadf commands have been heavily modified. It
is now easier to add (or remove) activities, since
these commands have been rewritten in a
non-monolithic way with a generic design
architecture.
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