SYSTAT(1)               NetBSD General Commands Manual               SYSTAT(1)

NAME
     systat -- display system statistics on a CRT

SYNOPSIS
     systat [-n] [-M core] [-N system] [-t turns] [-w wait] [display]
            [refresh-interval]

DESCRIPTION
     systat displays various system statistics in a screen oriented fashion
     using the curses screen display library, curses(3).

     While systat is running the screen is usually divided into two windows
     (an exception is the vmstat display which uses the entire screen).  The
     upper window depicts the current system load average.  The information
     displayed in the lower window may vary, depending on user commands.  The
     last line on the screen is reserved for user input and error messages.

     By default systat displays the processes getting the largest percentage
     of the processor in the lower window.  Other displays show more detailed
     process information, swap space usage, disk usage statistics (a la
     df(1)), disk I/O statistics (a la iostat(8)), virtual memory statistics
     (a la vmstat(1)), network ``mbuf'' utilization, and network connections
     (a la netstat(1)).

     Input is interpreted at two different levels.  A ``global'' command
     interpreter processes all keyboard input.  If this command interpreter
     fails to recognize a command, the input line is passed to a per-display
     command interpreter.  This allows each display to have certain display-
     specific commands.

     Command line options:

     -M core           Extract values associated with the name list from core
                       instead of the default /dev/mem.

     -N system         Extract the name list from system instead of the
                       default /netbsd.

     -n                Do not resolve IP addresses into string hostnames
                       (FQDNs) on netstat.  It has the same effect as numbers
                       subcommand in netstat.

     -w wait           See refresh-interval.

     -t turns          How many refreshes to show each screen in 'all' display
                       mode.

     display           The display argument expects to be one of: all,
                       bufcache, df, inet.icmp, inet.ip, inet.tcp,
                       inet.tcpsyn, inet6.ip6, iostat, mbufs, netstat, pigs,
                       ps, swap, syscall or vmstat.  These displays can also
                       be requested interactively and are described in full
                       detail below.

     refresh-interval  The refresh-interval specifies the screen refresh time
                       interval in seconds.  This is provided for backwards
                       compatibility, and overrides the refresh-interval spec-
                       ified with the -w flag.

     Certain characters cause immediate action by systat.  These are

     ^L          Refresh the screen.

     ^G          Print the name of the current ``display'' being shown in the
                 lower window and the refresh interval.

     ^Z          Stop systat.

     ?, h        Print the names of the available displays on the command
                 line.

     :           Move the cursor to the command line and interpret the input
                 line typed as a command.  While entering a command the cur-
                 rent character erase, word erase, and line kill characters
                 may be used.

     The following commands are interpreted by the ``global'' command inter-
     preter.

     help key    Print the names of the available displays on the command
                 line.  It will print long names as ``inet.*''.  To print
                 items under ``inet'', give inet as key.

     load        Print the load average over the past 1, 5, and 15 minutes on
                 the command line.

     stop        Stop refreshing the screen.

     [start] [number]
                 Start (continue) refreshing the screen.  If a second,
                 numeric, argument is provided it is interpreted as a refresh
                 interval in seconds.  Supplying only a number will set the
                 refresh interval to this value.

     quit        Exit systat.  (This may be abbreviated to q.)

     The available displays are:

     all         Cycle through all displays automatically.  At each display,
                 wait some refresh-turns, then switch to the next display.
                 Duration of one refresh-turn is adjustable with the -w
                 option, number of refresh-turns can be changed with the -t
                 option.

     bufcache    Display, in the lower window, statistics about the file sys-
                 tem buffers.  Statistics for each file system that has active
                 buffers include the number of buffers for that file system,
                 the number of active kilobytes in those buffers and the total
                 size of the buffers for that file system.

     df          Lists disk usage statistics for all filesystems, including
                 the available free space as well as a bar graph indicating
                 the used capacity.

                 The following commands are specific to the df display:

                 all         Displays information for all filesystems, includ-
                             ing kernfs, procfs and null-mounts.
                 some        Suppress information about procfs, kernfs and
                             null-mounts (default).

     inet.icmp   Display ICMP statistics.

     inet.ip     Display IPv4 and UDP statistics.

     inet.tcp    Display TCP statistics.

     inet.tcpsyn
                 Display statistics about the TCP ``syncache''.

     inet6.ip6   Display IPv6 statistics.

     iostat      Display, in the lower window, statistics about processor use
                 and disk throughput.  Statistics on processor use appear as
                 bar graphs of the amount of time executing in user mode
                 (``user''), in user mode running low priority processes
                 (``nice''), in system mode (``system''), and idle (``idle'').
                 Statistics on disk throughput show, for each drive, kilobytes
                 of data transferred, number of disk transactions performed,
                 and time spent in disk accesses in milliseconds.  This infor-
                 mation may be displayed as bar graphs or as rows of numbers
                 which scroll downward.  Bar graphs are shown by default;

                 The following commands are specific to the iostat display;
                 the minimum unambiguous prefix may be supplied.

                 numbers     Show the disk I/O statistics in numeric form.
                             Values are displayed in numeric columns which
                             scroll downward.
                 bars        Show the disk I/O statistics in bar graph form
                             (default).
                 secs        Toggle the display of time in disk activity (the
                             default is to not display time).
                 all         Show the read and write statistics combined
                             (default).
                 rw          Show the read and write statistics separately.

     mbufs       Display, in the lower window, the number of mbufs allocated
                 for particular uses, i.e. data, socket structures, etc.

     netstat     Display, in the lower window, network connections.  By
                 default, network servers awaiting requests are not displayed.
                 Each address is displayed in the format ``host.port'', with
                 each shown symbolically, when possible.  It is possible to
                 have addresses displayed numerically, limit the display to a
                 set of ports, hosts, and/or protocols (the minimum unambigu-
                 ous prefix may be supplied):

                 all           Toggle the displaying of server processes
                               awaiting requests (this is the equivalent of
                               the -a flag to netstat 1).
                 numbers       Display network addresses numerically.
                 names         Display network addresses symbolically.
                 protocol      Display only network connections using the
                               indicated protocol (currently either ``tcp'' or
                               ``udp'').
                 ignore [items]
                               Do not display information about connections
                               associated with the specified hosts or ports.
                               Hosts and ports may be specified by name
                               (``vangogh'', ``ftp''), or numerically.  Host
                               addresses use the Internet dot notation
                               (``128.32.0.9'').  Multiple items may be speci-
                               fied with a single command by separating them
                               with spaces.
                 display [items]
                               Display information about the connections asso-
                               ciated with the specified hosts or ports.  As
                               for ignore, [items] may be names or numbers.
                 show [ports|hosts]
                               Show, on the command line, the currently
                               selected protocols, hosts, and ports.  Hosts
                               and ports which are being ignored are prefixed
                               with a `!'.  If ports or hosts is supplied as
                               an argument to show, then only the requested
                               information will be displayed.
                 reset         Reset the port, host, and protocol matching
                               mechanisms to the default (any protocol, port,
                               or host).

     pigs        Display, in the lower window, those processes which are get-
                 ting the largest portion of the processor (the default dis-
                 play).  When less than 100% of the processor is scheduled to
                 user processes, the remaining time is accounted to the
                 ``idle'' process.

     ps          Display, in the lower window, the same information provided
                 by the command ps(1) with the flags -aux.

                 The following command is specific to the ps display; the min-
                 imum unambiguous prefix may be supplied.

                 user name   Limit the list of processes displayed to those
                             owned by user name.  If name is specified as `+',
                             processes owned by any user are displayed
                             (default).

     swap        Show information about swap space usage on all the swap areas
                 configured with swapctl(8).  The first column is the device
                 name of the partition.  The next column is the total space
                 available in the partition.  The Used column indicates the
                 total blocks used so far; the graph shows the percentage of
                 space in use on each partition.  If there are more than one
                 swap partition in use, a total line is also shown.  Areas
                 known to the kernel, but not in use are shown as not avail-
                 able.

     syscall     Show per system call statistics.  The display consists of
                 several columns of system call name and counts.

                 In order to stop entries moving around the screen too much,
                 an infinite response filter is applied to the values before
                 they are sorted.

                 The following commands are specific to the syscall display:

                 sort name     Sort display by the syscall name (default).
                 sort count    Sort display by the count of calls or time
                               spent in the calls.
                 sort syscall  Sort display be syscall number.
                 show count    Show the number of times the system call has be
                               called (default).
                 show time     Show the average amount of time (in arbitrary
                               units) spent in a call of the syscall.

     vmstat      Take over the entire display and show a (rather crowded) com-
                 pendium of statistics related to virtual memory usage,
                 process scheduling, device interrupts, system name transla-
                 tion caching, disk I/O etc.

                 The upper left quadrant of the screen shows the number of
                 users logged in and the load average over the last one, five,
                 and fifteen minute intervals.  Below this is a list of the
                 average number of processes (over the last refresh interval)
                 that are runnable (`r'), in page wait (`p'), in disk wait
                 other than paging (`d'), sleeping (`s').  Below the queue
                 length listing is a numerical listing and a bar graph showing
                 the amount of system (shown as `='), user (shown as `>'),
                 nice (shown as `-'), and idle time (shown as ` ').

                 To the right of the process statistics is a column that lists
                 the average number of context switches (`Csw'), traps (`Trp';
                 includes page faults), system calls (`Sys'), interrupts
                 (`Int'), network software interrupts (`Sof'), page faults
                 (`Flt').

                 Below this are statistics on memory utilization.  The first
                 row of the table reports memory usage only among active pro-
                 cesses, that is processes that have run in the previous
                 twenty seconds.  The second row reports on memory usage of
                 all processes.  The first column reports on the number of
                 physical pages claimed by processes.  The second column
                 reports the number of pages of memory and swap.  The third
                 column gives the number of pages of free memory and swap.

                 Below the memory display are statistics on name translations.
                 It lists the number of names translated in the previous
                 interval, the number and percentage of the translations that
                 were handled by the system wide name translation cache, and
                 the number and percentage of the translations that were han-
                 dled by the per process name translation cache.

                 At the bottom left is the disk usage display.  It reports the
                 number of seeks, transfers, number of kilobyte blocks trans-
                 ferred per second averaged over the refresh period of the
                 display (by default, five seconds), and the time spent in
                 disk accesses.  If there are more than five disks, and the
                 terminal window has more than 24 lines, the disks display
                 will be flipped so that more of the disk statistics are visi-
                 ble.

                 Under the date in the upper right hand quadrant are statis-
                 tics on paging and swapping activity.  The first two columns
                 report the average number of pages brought in and out per
                 second over the last refresh interval due to page faults and
                 the paging daemon.  The third and fourth columns report the
                 average number of pages brought in and out per second over
                 the last refresh interval due to swap requests initiated by
                 the scheduler.  The first row of the display shows the aver-
                 age number of disk transfers per second over the last refresh
                 interval; the second row of the display shows the average
                 number of pages transferred per second over the last refresh
                 interval.

                 Below the paging statistics is another columns of paging
                 data.  From top to bottom, these represent average numbers of
                 copy on write faults (`cow'), object cache lookups (`objlk'),
                 object cache hits (`objht'), pages zero filled on demand
                 (`zfodw'), number zfod's created (`nzfod'), percentage of
                 zfod's used (`%zfod'), number of kernel pages (`kern'), num-
                 ber of wired pages (`wire'), number of active pages (`act'),
                 number of inactive pages (`inact'), number of free pages
                 (`free'), pages freed by daemon (`daefr'), pages freed by
                 exiting processes (`prcfr'), number of pages reactivated from
                 freelist (`react'), scans in page out daemon (`scan'), revo-
                 lutions of the hand (`hdrev'), and in-transit blocking page
                 faults (`intrn'), per second over the refresh period.  Note
                 that the `%zfod' percentage is usually less than 100%, how-
                 ever it may exceed 100% if a large number of requests are
                 actually used long after they were set up during a period
                 when no new pages are being set up.  Thus this figure is most
                 interesting when observed over a long time period, such as
                 from boot time (see below on getting such a display).

                 To the left of the column of paging statistics is a breakdown
                 of the interrupts being handled by the system.  At the top of
                 the list is the total interrupts per second over the time
                 interval.  The rest of the column breaks down the total on a
                 device by device basis.  Only devices that have interrupted
                 at least once since boot time are shown.

     Commands to switch between displays may be abbreviated to the minimum
     unambiguous prefix; for example, ``io'' for ``iostat''.  Certain informa-
     tion may be discarded when the screen size is insufficient for display.
     For example, on a machine with 10 drives the iostat bar graph displays
     only 3 drives on a 24 line terminal.  When a bar graph would overflow the
     allotted screen space it is truncated and the actual value is printed
     ``over top'' of the bar.

     The following commands are common to each display which shows information
     about disk drives.  These commands are used to select a set of drives to
     report on, should your system have more drives configured than can nor-
     mally be displayed on the screen.

     display [drives]
                   Display information about the drives indicated.  Multiple
                   drives may be specified, separated by spaces.
     ignore [drives]
                   Do not display information about the drives indicated.
                   Multiple drives may be specified, separated by spaces.
     drives [drives]
                   With no arguments, display a list of available drives.
                   With arguments, replace the list of currently displayed
                   drives with the ones specified.

     The following commands are specific to the inet.*, inet6.*, syscall and
     vmstat displays; the minimum unambiguous prefix may be supplied.

     boot          Display cumulative statistics since the system was booted.
     run           Display statistics as a running total from the point this
                   command is given.
     time          Display statistics averaged over the refresh interval (the
                   default).
     zero          Reset running statistics to zero.

FILES
     /netbsd        For the namelist.
     /dev/kmem      For information in main memory.
     /etc/hosts     For host names.
     /etc/networks  For network names.
     /etc/services  For port names.

NOTES
     Much of the information that systat vmstat uses is obtained from struct
     vmmeter cnt.

SEE ALSO
     df(1), netstat(1), ps(1), top(1), vmstat(1), iostat(8), pstat(8)

HISTORY
     The systat program appeared in 4.3BSD.

BUGS
     Consumes CPU resources and thus may skew statistics.

     Certain displays presume a minimum of 80 characters per line.

     The vmstat display looks out of place because it is (it was added in as a
     separate display from what used to be a different program).

NetBSD 6.1.5                    January 5, 2012                   NetBSD 6.1.5

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