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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:
Support for SNMP statistics has been added to sar. The option -l has been added to pidstat. This option enables the user to display the whole command line for each process. The option -h has been added to sar. This option displays a short help message. Some memory leaks detected by valgrind have been fixed.
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