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.