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:
Iostat displays read and write operations per
second in the NFS report. Sadc now retries to
write its buffers when the write() call has been
interrupted by a signal. The -h option has been
added to sadf: used with the -d or -D options, it
indicates that all activities should be displayed
horizontally on a single line of data. Sadf -d and
sadf -D now display the list of fields for easier
data reading. NLS has been updated, adding a
Chinese (Simplified) translation.
