2013/03/31: Version 10.1.5:

• mpstat now takes into account every interrupt per processor so that their number adds up to the number displayed for CPU "all".
• [Peter Schiffer]: systemd unit file couldn't be installed because PKG_PROG_PKG_CONFIG macro wasn't expanded in configure script. This is now fixed.
• [Benno Schulenberg]: Fixed a small inconsistency in pidstat usage message.
• Cosmetic fixes in pidstat manual page.
• NLS updated (de, eo, fi, fr, ja, nb, nl, ru, uk, vi).
• CREDITS file updated.
  

2013/03/08: Version 10.1.4:

• [Christophe Cerin]: pidstat now stops and displays its average stats when it receives SIGINT (crtl/c).
• mpstat now stops and displays its average stats when it receives SIGINT (crtl/c).
• sar now stops and displays its average stats when it receives SIGINT (crtl/c).
• pidstat now displays task's UID for all tasks.
• pidstat: -U option added. This option tells pidstat to display the username of the task instead of its UID. When this option is followed by a user name, then only tasks belonging to the specified user are displayed by pidstat.
• pidstat manual page updated.
• Now use sigaction() instead of signal() for signals handling to avoid portability problems.
• FAQ updated.
• NLS updated.
  

2012/12/23: Version 10.1.3:

• Changed network counters (used by sar -n {DEV | EDEV }) to unsigned long long to keep in sync with current kernels. WARNING: This breaks compatibility with older sar data files format for network statistics.
• Changed IPv4 counters (used by sar -n { IP | EIP}) to unsigned long long to keep in sync with current kernels. WARNING: This breaks compatibility with older sar data files format for IPv4 statistics.
• Changed IPv6 counters (used by sar -n { IP6 | EIP6}) to unsigned long long to keep in sync with current kernels. WARNING: This breaks compatibility with older sar data files format for IPv6 statistics.
• [Peter Schiffer]: Added option -y to iostat. This option prevents iostat from displaying its first report with statistics since system boot.
• [Peter Schiffer]: Increase NR_CPUS and NR_IRQS values.
• [John Lau]: sadc didn't collect all its activities when it had to overwrite an old sysstat data file with some unknown activity formats. This is now fixed.
• Now install sadc in $prefix/lib64 directory on 64 bit machines even if $prefix/lib directory also exists.
• Fixed DTD document: If computer has run all day without restart, XML output file from sadf -x has no boot elements.
• Remove heading spaces in softirq names displayed by mpstat for easier reading.
• Fixed wrong command execution syntax in configure script.
• Removed several unused definitions in some header files.
• iostat manual page updated.
• NLS updated.
• CREDITS file updated.

2012/10/06: Version 10.1.2:

• New field added to sar -u and mpstat: %gnice (time spent running a niced guest).
• New field added to sar -r: kbdirty (amount of memory waiting to get written back to disk).
• [Peter Schiffer]: systemd support added.
• [Peter Schiffer]: Sysstat init script updated to make it more conforming to LSB.
• XML DTD document name is now tagged with a version number.
• Fixed a fatal error when compiled with -Werror=format-security.
• sar, sadf and mpstat manual pages updated.
• DTD and XSD documents updated.
• Cosmetic change in sadf -H output.
• NLS updated.

2012/07/29: Version 10.1.1:

• Added option -[0-9]+ to sar to show data of that days ago.
• [Peter Schiffer]: Persistent device names support added to sar and iostat (option -j).
• [Peter Schiffer]: Make sysstat disk counters consistent with those from latest kernel (3.5). WARNING: This breaks compatibility with older sar data files format for disk activity.
• [Peter Schiffer]: sar: Use /sys/dev/block/major:minor links to determine devices real name.
• Part of 'sadf -H' output was written to stderr instead of stdout. This is now fixed.
• WARNING: sadf: Option '-T' has been renamed into '-U', and option '-t' has been renamed into '-T'.
• sadf: New option -t added. This option tells sadf to display the timestamps in the local time of the data file creator instead of UTC. The same option exists for sar.
• [Peter Schiffer]: Various cosmetic changes in manual pages and usage messages displayed by sysstat commands.
• FAQ updated.
• NLS updated.
• sar, sadf and iostat manual pages updated..

2012/05/16: Version 10.0.5:

• [Alain Chereau]: Options -g and -T added to iostat. These options enable the user to display statistics for groups of devices.
• [Vitezslav Cizek]: sadc now overwrites its standard daily data file when this file is from a past month.
• sadf: Change time format from HH-MM-SS to HH:MM:SS in the various reports displayed by sadf.
• XSD document updated: Added a maxOccurs indicator for the timestamp element.
• Added option --enable-collect-all to configure script. This option tells sadc to collect all possible activities, including optional ones.
• [Peter Schiffer]: Set exit code to 0 for sa2 shell script.
• NLS updated. Croatian translation added.
• iostat and sadc manual pages updated.
• FAQ updated.
• CREDITS file updated.
  

2012/03/07: Version 10.0.4:

• [Andrey Borzenkov]: Don't take virtual devices into account in sar -b results.
• [Peter Schiffer]: iostat didn't display target device information when a symbolic link was specified as a parameter. This is now fixed.
• The number of jiffies spent by a CPU in guest mode given by the corresponding counter in /proc/stat may be slightly different from that included in the user counter. Take this into account when calculating current time interval value.
• configure script updated: Added --disable-stripping option. Using this option tells configure to NOT strip object files.
• FAQ updated.
• sa1 manual page updated.
• NLS updated. Serbian translation added.

2011/11/27: Version 10.0.3:

• sadf: New output format added: JSON (JavaScript Object Notation). This format can be displayed with sadf's option -j.
• [Jürgen Heinemann]: Fixed a bug in sadf XML output.
• [Jürgen Heinemann]: Fixed several bugs in DTD and XSD documents.
• [Petr Uzel]: Fixed random crash with iostat when called with option -N [NOVELL Bug#729130].
• sadf manual page updated.
• NLS updated.
• CREDITS file updated.
  

2011/08/28: Version 10.0.2:

• sadf modified to make it easier to add new output formats. Its design is still not generic anyway.
• Option -T added to sadf: This option tells sadf to display timestamps in seconds since the epoch (when applicable).
• Option "-P ON" added to mpstat. This option tells mpstat to display stats only for online CPU.
• [Kei Ishida]: pidstat displayed stats for processes that had terminated while pidstat was running. This is now fixed.
• [Jeroen Roovers]: Automate translation files handling in Makefile.in.
• DTD and XSD documents updated.
• sadf and mpstat manual pages updated.
• pidstat manual page updated: Added description of field %MEM displayed by pidstat -r.
• Various cosmetic changes (sar.c, sadf.c).
• NLS updated.
• CREDITS file updated.
  

2011/06/03: Version 10.0.1:

• Added USB devices statistics to sar and sadc. The option "-m USB" can now be used with sar to take a snapshot of all the USB devices currently plugged into the system.
• sadf -p now displays the sensor device name for temperature, voltage inputs and fans statistics.
• sar and pidstat: Check that _("Average") string doesn't exceed the size of the timestamp buffer.
• [Ivana Varekova]: Added option -h to iostat. This option makes the device utilization report easier to read with long device names.
• [Ivana Varekova]: cifsiostat didn't count open files from the "Posix Open" column in /proc/fs/cifs/Stats file. This is now fixed.
• [Ivana Varekova]: Close file descriptor in read_uptime() function (rd_stats.c file).
• Fixed XML output displayed by sadf (hugepages statistics were included in <power-management> section).
• sar: Decrease column width for sensor device name (temperature, voltage inputs and fans statistics).
• Remove unnecessary arguments from functions in pr_stats.c.
• sar manual page updated.
• DTD and XSD documents updated and cleaned.
• NLS updated. Esperanto translation added.
• CREDITS file updated.
  

2011/03/15: Version 10.0.0:

• [Ivana Varekova]: Fix a problem with long NFS and CIFS share names in cifsiostat and nfsiostat.
• [Ivana Varekova]: Added the possibility to extend the number of slots for NFS and CIFS mount points on the fly.
• [Ivana Varekova]: Check calloc() return value in cifsiostat and nfsiostat.
• [Jan Kaluza]: Added --debuginfo option to cifsiostat and nfsiostat.
• cifsiostat and nfsiostat manual pages updated.
• Don't link sysstat's commands with sensors library if not needed [DEBIAN Bug#612571].
• [Adam Heath]: iostat incorrectly mapped device-mapper IDs greater than 256. This is now fixed [DEBIAN Bug#614397].
• Sysstat's commands option -V now displays the version number on stdout and returns 0 for the exit code.
• sysstat_panic function is now defined only in DEBUG mode.
• NLS updated. Ukrainian translation added.
• CREDITS file updated.
  

2010/12/26: Version 9.1.7:

• sar now tells sadc to read only the necessary groups of activities.
• Added a new metric (number of tasks waiting for I/O) to sar -q.
• Added two new metrics (amount of active and inactive memory) to sar -r.
• [Ivana Varekova]: Fix segfaults on bogus localtime input.
• Fixed bogus CPU statistics output, which happened when CPU user value from /proc/stat wasn't incremented whereas CPU guest value was.
• nfsiostat now takes into account POSIXLY_CORRECT environment variable. nfsiostat default output is expressed in kB/s, unless this variable is set (in which case the output is expressed in blocks/s).
• No longer assume that device-mapper major number is 253. Get the real number from /proc/devices file.
• DTD and XSD documents updated.
• [Kenichi Okuyama]: Small change to sar manual page.
• sar manual page updated.
• NLS updated.
• Code cleaned.
  

2010/11/10: Version 9.1.6:

• Added a new magical value for each activity in file. A format change can now hit only one activity instead of the whole file.
• Added CPU average clock frequency statistics to sar and sadc.
• Added hugepages utilization statistics to sar and sadc.
• Fixed some differences between XML output (as displayed by sadf -x) and DTD document.
• sadc -S POWER didn't include voltage inputs statistics. This is now fixed.
• Define groups of activities: Each activity has now a new attribute specifying the group it belongs to (POWER, IPV6, etc.)
• [Ivana Varekova]: Moved manual pages to $prefix/share/man instead of $prefix/man.
• [Ivana Varekova]: Fixed configure's --disable-man-group option.
• [Ivana Varekova]: Added SADC_OPTIONS to sysstat configuration file.
• [Ivana Varekova]: Added sysstat(5) manual page.
• sar manual page updated.
• DTD and XSD documents updated.
• NLS updated.
• Split up prf_stats.c file into rndr_stats.c and xml_stats.c
• Moved cron files in a separate cron subdirectory.
• Made sysstat git aware.
• CREDITS file updated.
  

2010/09/12: Version 9.1.5:

• Added voltage inputs statistics to sar and sadc.
• Added %temp field to device temperature statistics (sar -m TEMP).
• Added drpm field to fan speed statistics (sar -m FAN).
• XSD and DTD documents updated.
• sar manual page updated. Indicate that svctm field should no longer be trusted.
• Removed link to isag(1) from man pages.
• NLS updated. Czech translation added.
• Sample crontabs and sysstat init script: Don't collect disk data by default.
• Code cleaned.
  

2010/07/29: Version 9.1.4:

• [Jan Kaluza]: Added fan speed and device temperature statistics to sar and sadc.
• [Jan Kaluza]: Configure script updated. Now check for lm_sensors library.
• Configure script updated: Added --disable-sensors option.
• Configure script updated: Removed --enable-smp-race option.
• iconfig script updated.
• sar manual page updated.
• XSD and DTD documents updated.
• [Ivana Varekova]: sysstat init script updated.
• Default owner for sadc/sar crontab is now root.
• Various fixes in cifsiostat and nfsiostat manual pages.
• NLS updated.
  

2010/06/27: Version 9.1.3:

• [Ivana Varekova]: Move NFS code out from iostat and create the new nfsiostat command.
• [Ivana Varekova]: Added cifsiostat command. This command displays CIFS statistics.
• [Mario Konrad]: Added regular expressions support to pidstat's option -C.
• [Mario Konrad]: Added option -s to pidstat to display stack statistics.
• [Ivana Varekova]: Fixed condition used by sar to distinguish betwwen a counter reset by a newly registered device and a counter overflow.
• [Jan Kaluza]: Added --debuginfo option to iostat.
• [Jan Kaluza]: Added --enable-debuginfo option to configure script.
• iconfig configuration script updated.
• iostat manual page updated. Indicate that svctm field should no longer be trusted.
• autoconf script updated.
• NLS updated.
• README and CREDITS files updated.
  

2010/05/23: Version 9.1.2:

• Added r_await and w_await fields to iostat's extended statistics.
• Added support for tickless CPUs in sar and mpstat.
• NLS was not taken into account when mpstat or sar were displaying some null statistics. This is now fixed.
• sadc no longer syncs data with its output file contents. It put a pain on flash devices as it undermined any tuning of the vm's write behavior [DEBIAN Bug#559686].
• NLS updated. Basque translation added.
• iostat, sar and sa1 manual pages updated.
• CREDITS file updated.
  

2010/02/28: Version 9.1.1:

• Remove support for kernels older than 2.6.x.
• iostat now takes into account POSIXLY_CORRECT environment variable. iostat default output for disk utilization is expressed in kB/s, unless this variable is set (in which case the output is expressed in blocks/s).
• mpstat can now display per processor software interrupts statistics. This requires Linux kernel 2.6.31 or later.
• Because of a change in /proc/interrupts file format, mpstat was no longer counting the proper number of interrupts. This is now fixed.
• Manual pages updated.
• NLS updated.
• Code cleaned.
  

2009/11/11: Version 9.0.6:

• sadf -x now takes into account options -s and -e (which specify a starting and ending time) and also interval and count parameters [DEBIAN bug#546259].
• Option -C added to sadf. Use it to tell sadf to display comments present in file (also works with XML format).
• sar and sadf sometimes didn't handle COMMENT records properly. This is now fixed.
• XML output (displayed by sadf -x) modified for kernel tables statistics.
• XSD and DTD documents updated.
• [Yibin Shen]: HZ variable was not explicitly set in sadc.c. This is now fixed.
• [Lans Carstensen]: sargraph added (sargraph is a shell script used to make graphs based on sadf XML output).
• sadf manual page updated.
• FAQ updated.
• NLS updated.
• CREDITS file updated.

2009/09/20: Version 9.0.5:

• sysstat should now be able to pretty print device names whose minor numbers are greater than or equal to 256. (Tests have been made on a large 26TB RHEL5/PP Linux cluster.)
• sadc manual page updated.
• NLS updated.
• FAQ updated.

2009/07/19: Version 9.0.4:

• [Jonathan Kamens]: Fix double free/memory corruption bug with sadc.
• [Jeroen Roovers]: Get entirely rid of implicit rule for libsyscom.a in Makefile to fix a problem with parallel execution.
• sysstat.ioconf configuration file updated.
• NLS updated.
• CREDITS file updated.

2009/05/24: Version 9.0.3:

• [Michael Blakeley]: Option -z added to iostat. This option tells iostat to omit output for any devices for which there was no activity during the sample period.
• [Tomasz Pala]: Fix mpstat where interrupt values should be read as unsigned integers.
• sar -n ALL didn't select IPv6 statistics. This is now fixed.
• iostat, sar and mpstat manual pages updated.
• sadf -x now displays file creation date.
• XSD and DTD documents updated.
• NLS updated. Latvian translation added.
• CREDITS file updated.
• Code cleaned.

2009/04/02: Version 9.0.2:

• sadc can now collect partition statistics in addition to disk ones. Keywords XDISK and XALL have been added to -S option.
• Fixed a memory corruption in pidstat and iostat. This corruption could happen when a list of comma-separated values following option -p was entered on the command line.
• configure now takes into account a new variable named rcdir. This variable may be used to specify the directory where startup scripts will be installed.
• The value of directory for installing documentation files can now be set with configure's --docdir option.
• Fixed a small bug in activity.c file, where there was a missing semicolon between two fields.
• sar and sadc manual pages updated.
• NLS updated.
• CREDITS file updated.

2009/03/07: Version 9.0.1:

• Fix a crash with sar where a pointer was freed twice.
• NLS updated.
• sar manual page updated.
• CREDITS file updated.

2009/03/01: Version 9.0.0:

• Option -m added to sar. This option is intended to display power management statistics. At the present time, only CPU frequency statistics are available.
• sadc updated: Option "-S POWER" tells sadc to collect power management statistics.
• sadf command updated to take into account power management statistics.
• [Mike Harvey]: No longer truncate the interval of time to 32 bits, as this may cause some problems when displaying average values statistics on machines with hundreds of CPU.
• read_uptime(): Cast values read from /proc/uptime to unsigned long long.
• Fixed a small bug in sar where it didn't parse arguments properly when some options were entered in a specific order.
• sadc and sar manual pages updated.
• XSD and DTD documents updated.
• FAQ updated.
• NLS updated.
• Code cleaned. Makefile cleaned.

2009/01/11: Version 8.1.8:

• IPv6 support added. A bunch of new metrics have been added to sar, enabling the user to display statistics for IPv6 protocol family (IPv6, ICMPv6, UDPv6 and network sockets).
• sadc updated: Option "-S IPV6" tells sadc to collect IPv6 statistics.
• sadf command updated to take into account IPv6 statistics.
• Options -S (for sadc), -P (for mpstat, sar and sadf), -p (for iostat and pidstat) and -n and -I (for sar) now accept a list of comma-separated arguments.
• [Ivana Varekova]: Make iostat display statistics for devices only (and not partitions) when not using its option -d. This was no longer possible with kernels 2.6.25 and later because iostat couldn't distinguish between devices and partitions any more.
• iostat's options -x and -p are no longer mutually exclusive: Extended statistics are now available even for partitions with recent kernels.
• iostat was unable to read stats from sysfs for devices who had a slash in their names (for example, iostat -p /dev/cciss/c0d0 didn't work properly before). This is now fixed.
• [Amir Rapson]: Fixed a bug in iostat where %CPU spent servicing hard and soft irq were counted twice. This bug was introduced in 8.1.5.
• DTD and XSD files updated.
• Manual pages updated.
• NLS updated. Maltese translation added.
• CREDITS file updated.

2008/11/13: Version 8.1.7:

• Support for SNMP statistics added to sar. Several keywords have been added to option "-n". The user can now display statistics about IP, ICMP, TCP and UDP network traffic.
• sadc updated: Option "-S SNMP" tells sadc to collect SNMP statistics.
• sadf command updated to take into account SNMP statistics.
• sadf -x now also displays number of CPU.
• DTD and XSD files updated.
• sar/sadc: Each item (like network interfaces) is now counted once.
• [Eduardo Ferro Aldama]: Option -l added to pidstat. This option enables the user to display the whole command line for each process.
• Option -h added to sar. This option displays a short help message.
• Cosmetic change in sadf -x output for network statistics.
• sadf -H now displays the real name of each activity saved in file.
• Fixed some memory leaks detected by valgrind.
• pidstat, sar and sadc manual pages updated.
• FAQ updated.
• NLS updated.
• CREDITS file updated.
• Code cleaned.

2008/09/30: Version 8.1.6:

• Option -h added to pidstat. This option is used to display all activities horizontally on a single line.
• Fixed a bug in pidstat: When pidstat was used to monitor a process and all its threads (with pidstat's option -t), it could display weird values if the thread group leader terminated.
• Header line displayed by sar, iostat, mpstat, pidstat and sadf -H now includes the number of CPU.
• Use the correct word TGID instead of PID with pidstat -t.
• mpstat now displays stats for all interrupts, including NMI, LOC, etc.
• sar and sadf now check that CPU activity is available in file.
• iostat's option -t now always displays the date and the time.
• Added option "--disable-documentation" to ./configure. Using this option prevents documentation files (including manual pages) from being installed.
• iconfig script updated. Now ask the user for documentation and isag script installation.
• Manual pages updated.
• NLS updated. Indonesian and Chinese (traditional) translations added.
• README-nls file updated.
• Makefile updated: There is now a dedicated target to install or uninstall NLS files.
• FAQ updated.
• CREDITS file updated.
• Code cleaned.

2008/07/14: Version 8.1.5:

• Added virtual machine time accounting to "sar -u ALL" and mpstat (%guest).
• pidstat has also been updated to be able to display time spent in virtual machine for a task, and for a task and all its children.
• Option -S added to sar: This options tells sar to display swap space utilization. Option -r now only displays memory utilization.
• Added %swpcad to sar -S (percentage of cached swap memory in relation to the amount of used swap space).
• Added kbcommit and %commit to sar -r (amount and percentage of memory needed for current workload).
• sadf -x now distinguishes between options -r and -R.
• sadf command updated to take into account new fields (%guest, %swpcad, etc.)
• [Ivana Varekova]: iostat now displays the total number of operations per second in the NFS report.
• Fixed iostat so that %system (percentage of CPU utilization that occurred while executing at system level) also takes into account time spent to service interrupts and softirqs.
• Added a missing header line for activities with multiple outputs displayed by sar (eg. sar -rR ...).
• Makefile updated: There is now a dedicated target to install or uninstall manual pages.
• Manual pages updated.
• Code cleaned.
• XSD and DTD documents updated.
• isag script updated.

2008/06/22: Version 8.1.4:

• sar can now collect and display all CPU fields with its new option "-u ALL". sadf has also been updated to be able to display them.
• mpstat can now display per-CPU interrupts statistics with its option "-I CPU". This was a feature available in sar that was removed in previous sysstat version.
• mpstat uses now a separate option ("-I SUM") to display the total number of interrupts for each processor.
• Option -A added to mpstat. This switch tells mpstat to display all possible activities.
• NFS v4 support added to sar -n NFS(D). When both NFS v3 and NFS v4 are used, stats from NFS v3 and NFS v4 are added together [DEBIAN bug#434442].
• Code cleaned: mpstat, iostat and pidstat now use the common functions from rd_stats.c to read CPU stats from /proc/stat; Computing extended disk statistics (service time, etc.) is now done in one place (common function used by iostat, sar, sadf).
• All sysstat commands are made consistent with how parameters are interpreted: "COMMAND <interval>" now generates a report continusouly, "COMMAND <interval> 0" causes an error, "COMMAND 0" displays a report since system startup [DEBIAN bug#475707].
• Changed XML output for processes and context switches displayed by sadf -x to be consistent with output from sar.
• mpstat and sar manual pages updated.
• isag script updated.
• FAQ updated.
• DTD and XML Schema updated.
• NLS updated.

2008/05/25: Version 8.1.3:

• sar, sadc and sadf heavily modified. It is now easier to add (or remove) activities since sar and sadc have been rewritten in a non-monolithic way with a generic design architecture.
• Option -c removed from sar. Task creation and context switch activities are now merged and available with option -w.
• sar no longer displays interrupts per processor statistics. This feature will be included in mpstat in next sysstat version.
• Option -S added to sadc. This option replaces previous options -I or -d, and is used to select activities that should be collected and saved in file. It is even possible to select each activity collected by sadc.
• Format of data files created by sar/sadc heavily modified. In some cases, it is now possible to add or remove activities while keeping a compatible format that can be read by a previous or future sysstat version.
• sadf now only displays activities that have been explicitly selected.
• sar now checks that devices displayed by option -d are whole devices (and not partitions) using sysstat.ioconf configuration file. If this file is not found in its default directory, then sysstat looks for it in current directory.
• gettextize entire usage() messages so that translators have free scope to act.
• DTD and XML Schema updated.
• Manual pages updated.
• Crontab samples updated.
• FAQ updated.
• Code cleaned.

2008/03/16: Version 8.1.2:

• iostat now 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.
• Use setbuf() call instead of fflush() to indicate that data should not be buffered to stdout.
• Option -h added to sadf. Used with options -d or -D, 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.
• sadf and iostat manual pages updated.
• NLS updated: Chinese (simplified) translation added, other translations updated.

2008/02/10: Version 8.1.1:

• System activity data files now have extra header data that enable to identify which version of sysstat created them.
• sadf -H now displays the version of sysstat used to create a system activity data file.
• Machine architecture is now displayed in the reports header. sadf -x also displays machine architecture.
• DTD and XML Schema documents updated.
• The number of processors was not properly calculated on machines where a directory named cpuidle was present in the /sys/devices/system/cpu directory [GENTOO bug# 207886].
• Use __CPU_SETSIZE definition from <sched.h> instead of a static definition for the maximum number of CPUs (NR_CPUS).
• Improved error messages displayed by sysstat's commands.
• NLS updated: Finnish translation added, Dutch translation updated.
• FAQ updated.
• Code cleaned and documented. Linux-like style applied to code source. Large functions split into smaller ones.