The sysstat package contains the sar, sadf, iostat, nfsiostat, cifsiostat, 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. The nfsiostat command reports I/O statistics for network filesystems. The cifsiostat command reports I/O statistics for CIFS filesystems.
|Tags||Monitoring Systems Administration|
|Operating Systems||POSIX Linux|
Release Notes: The pidstat command can now display task scheduling priority and policy information. Pidstat can also filter processes by name. The standard system activity daily data files may now be named "saYYYYMMDD" instead of "saDD" using sar's and sadc's option -D, and they can be located in a directory which can be different from the standard /var/log/sa place.
Release Notes: sar can now take into account a change of CPU count in its data files without losing any data. systemd timer units have been added to replace cronjobs. The nfsiostat command has been renamed nfsiostat-sysstat to avoid confusion with that included in nfs-utils package.
Release Notes: The pidstat command now includes a new metric giving per-task block I/O delays. A new option has been added to the configure script (--enable-copy-only). sadf now displays the data file creation date.
Release Notes: A new option (-v) has been added to pidstat, enabling the user to display the number of threads and file descriptors associated with tasks. Several bugs have been fixed in pidstat.
Release Notes: A new metric has been added to sar network devices statistics, giving the utilization percentage of the network interface cards. Several bugs have been fixed all around.