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The sysstat utilities are a collection of open source performance monitoring tools for Linux. The utilities include mpstat, iostat, nfsiostat-sysstat, cifsiostat, pidstat, sar, sadc, sadf and sa tools.

  • iostat - reports CPU statistics and input/output statistics for devices, partitions and network filesystems
  • mpstat - reports individual or combined processor related statistics
  • pidstat - reports statistics for Linux tasks (processes) : I/O, CPU, memory, etc
  • sar - collects, reports and saves system activity information (CPU, memory, disks, interrupts, network interfaces, TTY, kernel tables, etc)
  • sadc - is the system activity data collector, used as a backend for sar
  • sa1 - collects and stores binary data in the system activity daily data file. It is a front end to sadc designed to be run from cron
  • sa2 - writes a summarized daily activity report. It is a front end to sar designed to be run from cron
  • sadf - displays data collected by sar in multiple formats (CSV, XML, etc.) This is useful to load performance data into a database, or import them in a spreadsheet to make graphs
  • nfsiostat-sysstat - reports input/output statistics for network filesystems (NFS)
  • cifsiostat - reports CIFS statistics

 sysstat 11.0.0

Free to download



Sebastien Godard


System Requirements

Documentation, Tutorial, FAQ, GitHub

Selected Reviews:

Features include:

  • Monitor:
    • Input / Output and transfer rate statistics (global, per device, per partition, per network filesystem and per Linux task / PID)
    • CPU statistics (global, per CPU and per Linux task / PID), including support for virtualization architectures
    • Memory, hugepages and swap space utilization statistics
    • Virtual memory, paging and fault statistics
    • Per-task (per-PID) memory and page fault statistics
    • Global CPU and page fault statistics for tasks and all their children
    • Process creation activity
    • Interrupt statistics (global, per CPU and per interrupt, including potential APIC interrupt sources, hardware and software interrupts)
    • Extensive network statistics: network interface activity (number of packets and kB received and transmitted per second, etc.) including failures from network devices; network traffic statistics for IP, TCP, ICMP and UDP protocols based on SNMPv2 standards; support for IPv6-related protocols
    • NFS server and client activity
    • Socket statistics
    • Run queue and system load statistics
    • Kernel internal tables utilization statistics
    • System and per Linux task switching activity
    • Swapping statistics
    • TTY device activity
    • Power management statistics (instantaneous and average CPU clock frequency, fans speed, devices temperature, voltage inputs, USB devices plugged into the system)
    • Filesystems utilization (inodes and blocks)
  • Average statistics values are calculated over the sampling period
  • Most system statistics can be saved in a file for future inspection
  • Allows to configure the length of data history to keep
  • On the fly detection of new devices (disks, network interfaces, etc.) that are created or registered dynamically
  • Support for UP and SMP machines, including machines with hyperthreaded or multi-core processors
  • Support for hotplug CPUs (it detects automagically processors that are disabled or enabled on the fly) and tickless CPUs
  • Works on many different architectures, whether 32- or 64-bit
  • Needs very little CPU time to run (written in C)
  • System statistics can be exported in various different formats (CSV, XML, JSON, etc.). DTD and XML Schema documents are included in sysstat package
  • Internationalization support
  • Many programs available on the internet to use sysstat's data to make graphs (one of them, isag, is included in sysstat)

pidstat in action

Return to Console Process Viewers Home Page

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Last Updated Sunday, August 17 2014 @ 08:26 AM EDT

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