sar

Tartalom

 

Adatok

Licenc:
Verziószám:
Fejlesztő/tulajdonos:

Rövid leírás:

A sar Linux parancs manual oldala és súgója. A sar parancs segítségével valós időben figyelhetők a különböző Linux alrendszerek (CPU, memória, I/O) teljesítménye.

A sar parancs használatához Debian és ubuntu rendszereken a sysstat csomag telepítése szükséges:

sudo apt-get install sysstat

 

 

Man oldal kimenet

man sar
Manual kimenet
...
...
SAR(1)                                                  Linux User's Manual                                                  SAR(1)

NAME
       sar - Collect, report, or save system activity information.

SYNOPSIS
       sar [ -A ] [ -B ] [ -b ] [ -C ] [ -D ] [ -d ] [ -F [ MOUNT ] ] [ -H ] [ -h ] [ -p ] [ -q ] [ -r [ ALL ] ] [ -S ] [ -t ] [ -u
       [ ALL ] ] [ -V ] [ -v ] [ -W ] [ -w ] [ -y ] [ -z ] [ --dec={ 0 | 1 | 2 } ] [ --dev= dev_list ] [ --fs= fs_list ] [ --help ]
       [  --human  ]  [  --iface=  iface_list ] [ --sadc ] [ -I { int_list | SUM | ALL } ] [ -P { cpu_list | ALL } ] [ -m { keyword
       [,...] | ALL } ] [ -n { keyword [,...] | ALL } ] [ -j { ID | LABEL | PATH | UUID | ... } ] [ -f [ filename ] | -o [ filename
       ] | -[0-9]+ ] [ -i interval ] [ -s [ hh:mm[:ss] ] ] [ -e [ hh:mm[:ss] ] ] [ interval [ count ] ]

DESCRIPTION
       The sar command writes to standard output the contents of selected cumulative activity counters in the operating system. The
       accounting system, based on the values in the count and interval parameters, writes  information  the  specified  number  of
       times  spaced at the specified intervals in seconds.  If the interval parameter is set to zero, the sar command displays the
       average statistics for the time since the system was started. If the interval parameter is specified without the  count  pa‐
       rameter,  then  reports  are  generated  continuously.  The collected data can also be saved in the file specified by the -o
       filename flag, in addition to being displayed onto the screen. If filename is omitted, sar uses the standard system activity
       daily data file (see below).  By default all the data available from the kernel are saved in the data file.

       The  sar  command extracts and writes to standard output records previously saved in a file. This file can be either the one
       specified by the -f flag or, by default, the standard system activity daily data file.  It is also possible to enter -1,  -2
       etc. as an argument to sar to display data of that days ago. For example, -1 will point at the standard system activity file
       of yesterday.

       Standard system activity daily data files are named saDD or saYYYYMMDD, where YYYY stands for the current year, MM  for  the
       current  month  and DD for the current day. They are the default files used by sar only when no filename has been explicitly
       specified.  When used to write data to files (with its option -o), sar will use saYYYYMMDD if option -D has also been speci‐
       fied, else it will use saDD.  When used to display the records previously saved in a file, sar will look for the most recent
       of saDD and saYYYYMMDD, and use it.

       Standard system activity daily data files are located in the /var/log/sysstat directory by default. Yet it  is  possible  to
       specify  an alternate location for them: If a directory (instead of a plain file) is used with options -f or -o then it will
       be considered as the directory containing the data files.

       Without the -P flag, the sar command reports system-wide (global among all processors) statistics, which are  calculated  as
       averages for values expressed as percentages, and as sums otherwise. If the -P flag is given, the sar command reports activ‐
       ity which relates to the specified processor or processors. If -P ALL is given, the sar command reports statistics for  each
       individual processor and global statistics among all processors. Offline processors are not displayed.

       You can select information about specific system activities using flags. Not specifying any flags selects only CPU activity.
       Specifying the -A flag selects all possible activities.

       The default version of the sar command (CPU utilization report) might be one of the first facilities the user runs to  begin
       system  activity  investigation,  because it monitors major system resources. If CPU utilization is near 100 percent (user +
       nice + system), the workload sampled is CPU-bound.

       If multiple samples and multiple reports are desired, it is convenient to specify an output file for the sar  command.   Run
       the sar command as a background process. The syntax for this is:

       sar -o datafile interval count >/dev/null 2>&1 &

       All  data  are  captured in binary form and saved to a file (datafile).  The data can then be selectively displayed with the
       sar command using the -f option. Set the interval and count parameters to select count records at interval second intervals.
       If the count parameter is not set, all the records saved in the file will be selected.  Collection of data in this manner is
       useful to characterize system usage over a period of time and determine peak usage hours.

       Note:     The sar command only reports on local activities.

OPTIONS
       -A     This is equivalent to specifying -bBdFHqSuvwWy -I SUM -I ALL -m ALL -n ALL -r ALL -u ALL -P ALL.

       -B     Report paging statistics.  The following values are displayed:

              pgpgin/s
                     Total number of kilobytes the system paged in from disk per second.

              pgpgout/s
                     Total number of kilobytes the system paged out to disk per second.

              fault/s
                     Number of page faults (major + minor) made by the system per second.  This is not a count of page faults  that
                     generate I/O, because some page faults can be resolved without I/O.

              majflt/s
                     Number  of  major  faults the system has made per second, those which have required loading a memory page from
                     disk.

              pgfree/s
                     Number of pages placed on the free list by the system per second.

              pgscank/s
                     Number of pages scanned by the kswapd daemon per second.

              pgscand/s
                     Number of pages scanned directly per second.

              pgsteal/s
                     Number of pages the system has reclaimed from cache (pagecache and swapcache) per second to satisfy its memory
                     demands.

              %vmeff
                     Calculated  as  pgsteal  / pgscan, this is a metric of the efficiency of page reclaim. If it is near 100% then
                     almost every page coming off the tail of the inactive list is being reaped. If it gets too low (e.g. less than
                     30%) then the virtual memory is having some difficulty.  This field is displayed as zero if no pages have been
                     scanned during the interval of time.

       -b     Report I/O and transfer rate statistics.  The following values are displayed:

              tps
                     Total number of transfers per second that were issued to physical devices.  A transfer is an I/O request to  a
                     physical  device. Multiple logical requests can be combined into a single I/O request to the device.  A trans‐
                     fer is of indeterminate size.

              rtps
                     Total number of read requests per second issued to physical devices.

              wtps
                     Total number of write requests per second issued to physical devices.

              bread/s
                     Total amount of data read from the devices in blocks per second.  Blocks are equivalent to sectors and  there‐
                     fore have a size of 512 bytes.

              bwrtn/s
                     Total amount of data written to devices in blocks per second.

       -C     When reading data from a file, tell sar to display comments that have been inserted by sadc.

       -D     Use saYYYYMMDD instead of saDD as the standard system activity daily data file name. This option works only when used
              in conjunction with option -o to save data to file.

       -d     Report activity for each block device.  When data are displayed, the device specification devM-n  is  generally  used
              (DEV  column).   M is the major number of the device and n its minor number.  Device names may also be pretty-printed
              if option -p is used or persistent device names can be printed if option -j is used (see below). Statistics  for  all
              devices  are  displayed  unless  a restricted list is specified using option --dev= (see corresponding option entry).
              Note that disk activity depends on sadc options -S DISK and -S XDISK to be collected. The following values  are  dis‐
              played:

              tps
                     Total  number of transfers per second that were issued to physical devices.  A transfer is an I/O request to a
                     physical device. Multiple logical requests can be combined into a single I/O request to the device.  A  trans‐
                     fer is of indeterminate size.

              rkB/s
                     Number of kilobytes read from the device per second.

              wkB/s
                     Number of kilobytes written to the device per second.

              areq-sz
                     The average size (in kilobytes) of the I/O requests that were issued to the device.
                     Note: In previous versions, this field was known as avgrq-sz and was expressed in sectors.

              aqu-sz
                     The average queue length of the requests that were issued to the device.
                     Note: In previous versions, this field was known as avgqu-sz.

              await
                     The  average time (in milliseconds) for I/O requests issued to the device to be served. This includes the time
                     spent by the requests in queue and the time spent servicing them.

              svctm
                     The average service time (in milliseconds) for I/O requests that were issued to the device.  Warning!  Do  not
                     trust this field any more. This field will be removed in a future sysstat version.

              %util
                     Percentage  of elapsed time during which I/O requests were issued to the device (bandwidth utilization for the
                     device). Device saturation occurs when this value is close to 100% for devices serving requests serially.  But
                     for  devices  serving  requests in parallel, such as RAID arrays and modern SSDs, this number does not reflect
                     their performance limits.

       --dec={ 0 | 1 | 2 }
              Specify the number of decimal places to use (0 to 2, default value is 2).

       --dev=dev_list
              Specify the block devices for which statistics are to be displayed by sar.  dev_list is a list of comma-separated de‐
              vice names.

       -e [ hh:mm[:ss] ]
              Set  the ending time of the report. The default ending time is 18:00:00. Hours must be given in 24-hour format.  This
              option can be used when data are read from or written to a file (options -f or -o).

       -F [ MOUNT ]
              Display statistics for currently mounted filesystems. Pseudo-filesystems are ignored. At the end of the  report,  sar
              will  display  a summary of all those filesystems.  Use of the MOUNT parameter keyword indicates that mountpoint will
              be reported instead of filesystem device. Statistics for all filesystems are displayed unless a  restricted  list  is
              specified  using  option --fs= (see corresponding option entry).  Note that filesystems statistics depend on sadc op‐
              tion -S XDISK to be collected.

              The following values are displayed:

              MBfsfree
                     Total amount of free space in megabytes (including space available only to privileged user).

              MBfsused
                     Total amount of space used in megabytes.

              %fsused
                     Percentage of filesystem space used, as seen by a privileged user.

              %ufsused
                     Percentage of filesystem space used, as seen by an unprivileged user.

              Ifree
                     Total number of free file nodes in filesystem.

              Iused
                     Total number of file nodes used in filesystem.

              %Iused
                     Percentage of file nodes used in filesystem.

       -f [ filename ]
              Extract records from filename (created by the -o filename flag). The default value of the filename parameter  is  the
              current standard system activity daily data file.  If filename is a directory instead of a plain file then it is con‐
              sidered as the directory where the standard system activity daily data files are located. The -f option is  exclusive
              of the -o option.

       --fs=fs_list
              Specify  the  filesystems  for  which  statistics  are  to be displayed by sar.  fs_list is a list of comma-separated
              filesystem names or mountpoints.

       -H     Report hugepages utilization statistics.  The following values are displayed:

              kbhugfree
                     Amount of hugepages memory in kilobytes that is not yet allocated.

              kbhugused
                     Amount of hugepages memory in kilobytes that has been allocated.

              %hugused
                     Percentage of total hugepages memory that has been allocated.

       -h     Make the output of sar easier to read by a human. Options --human and -p (pretty-print) are enabled  implicitly  with
              this  option.  This option may be especially useful when displaying e.g., network interfaces or block devices statis‐
              tics.

       --help Display a short help message then exit.

       --human
              Print sizes in human readable format (e.g. 1.0k, 1.2M, etc.)  The units displayed  with  this  option  supersede  any
              other default units (e.g.  kilobytes, sectors...) associated with the metrics.

       -I { int_list | SUM | ALL }
              Report  statistics  for  interrupts.   int_list  is  a  list  of  comma-separated  values  or  range of values (e.g.,
              0-16,35,400-).  The SUM keyword indicates that the total number of interrupts received per second is to be displayed.
              The  ALL keyword indicates that statistics from all interrupts, including potential APIC interrupt sources, are to be
              reported.  Note that interrupt statistics depend on sadc option "-S INT" to be collected.

       -i interval
              Select data records at seconds as close as possible to the number specified by the interval parameter.

       --iface=iface_list
              Specify the network interfaces for which statistics are to be displayed by sar.  iface_list is a list of  comma-sepa‐
              rated interface names.

       -j { ID | LABEL | PATH | UUID | ... }
              Display  persistent device names. Use this option in conjunction with option -d.  Options ID, LABEL, etc. specify the
              type of the persistent name. These options are not limited, only prerequisite is that directory with required persis‐
              tent  names  is  present  in  /dev/disk.   If  persistent  name  is  not  found  for  the  device, the device name is
              pretty-printed (see option -p below).

       -m { keyword [,...] | ALL }
              Report power management statistics.  Note that these statistics depend on sadc's option "-S POWER" to be collected.

              Possible keywords are CPU, FAN, FREQ, IN, TEMP and USB.

              With the CPU keyword, statistics about CPU are reported.  The following value is displayed:

              MHz
                     Instantaneous CPU clock frequency in MHz.

              With the FAN keyword, statistics about fans speed are reported.  The following values are displayed:

              rpm
                     Fan speed expressed in revolutions per minute.

              drpm
                     This field is calculated as the difference between current fan speed (rpm) and its low limit (fan_min).

              DEVICE
                     Sensor device name.

              With the FREQ keyword, statistics about CPU clock frequency are reported.  The following value is displayed:

              wghMHz
                     Weighted average CPU clock frequency in MHz.  Note that the cpufreq-stats driver must be compiled in the  ker‐
                     nel for this option to work.

              With the IN keyword, statistics about voltage inputs are reported.  The following values are displayed:

              inV
                     Voltage input expressed in Volts.

              %in
                     Relative  input  value. A value of 100% means that voltage input has reached its high limit (in_max) whereas a
                     value of 0% means that it has reached its low limit (in_min).

              DEVICE
                     Sensor device name.

              With the TEMP keyword, statistics about devices temperature are reported.  The following values are displayed:

              degC
                     Device temperature expressed in degrees Celsius.

              %temp
                     Relative device temperature. A value of 100% means that temperature has reached its high limit (temp_max).

              DEVICE
                     Sensor device name.

              With the USB keyword, the sar command takes a snapshot of all the USB devices currently plugged into the  system.  At
              the end of the report, sar will display a summary of all those USB devices.  The following values are displayed:

              BUS
                     Root hub number of the USB device.

              idvendor
                     Vendor ID number (assigned by USB organization).

              idprod
                     Product ID number (assigned by Manufacturer).

              maxpower
                     Maximum power consumption of the device (expressed in mA).

              manufact
                     Manufacturer name.

              product
                     Product name.

              The  ALL keyword is equivalent to specifying all the keywords above and therefore all the power management statistics
              are reported.

       -n { keyword [,...] | ALL }
              Report network statistics.

              Possible keywords are DEV, EDEV, FC, ICMP, EICMP, ICMP6, EICMP6, IP, EIP, IP6, EIP6, NFS, NFSD,  SOCK,  SOCK6,  SOFT,
              TCP, ETCP, UDP and UDP6.

              With  the  DEV  keyword, statistics from the network devices are reported.  Statistics for all network interfaces are
              displayed unless a restricted list is specified using option --iface= (see corresponding option entry).  The  follow‐
              ing values are displayed:

              IFACE
                     Name of the network interface for which statistics are reported.

              rxpck/s
                     Total number of packets received per second.

              txpck/s
                     Total number of packets transmitted per second.

              rxkB/s
                     Total number of kilobytes received per second.

              txkB/s
                     Total number of kilobytes transmitted per second.

              rxcmp/s
                     Number of compressed packets received per second (for cslip etc.).

              txcmp/s
                     Number of compressed packets transmitted per second.

              rxmcst/s
                     Number of multicast packets received per second.

              %ifutil
                     Utilization  percentage  of the network interface. For half-duplex interfaces, utilization is calculated using
                     the sum of rxkB/s and txkB/s as a percentage of the interface speed. For full-duplex, this is the  greater  of
                     rxkB/S or txkB/s.

              With  the  EDEV  keyword,  statistics on failures (errors) from the network devices are reported.  Statistics for all
              network interfaces are displayed unless a restricted list is specified using option --iface= (see  corresponding  op‐
              tion entry).  The following values are displayed:

              IFACE
                     Name of the network interface for which statistics are reported.

              rxerr/s
                     Total number of bad packets received per second.

              txerr/s
                     Total number of errors that happened per second while transmitting packets.

              coll/s
                     Number of collisions that happened per second while transmitting packets.

              rxdrop/s
                     Number of received packets dropped per second because of a lack of space in linux buffers.

              txdrop/s
                     Number of transmitted packets dropped per second because of a lack of space in linux buffers.

              txcarr/s
                     Number of carrier-errors that happened per second while transmitting packets.

              rxfram/s
                     Number of frame alignment errors that happened per second on received packets.

              rxfifo/s
                     Number of FIFO overrun errors that happened per second on received packets.

              txfifo/s
                     Number of FIFO overrun errors that happened per second on transmitted packets.

              With  the FC keyword, statistics about fibre channel traffic are reported.  Note that fibre channel statistics depend
              on sadc's option "-S DISK" to be collected.  The following values are displayed:

              FCHOST
                     Name of the fibre channel host bus adapter (HBA) interface for which statistics are reported.

              fch_rxf/s
                     The total number of frames received per second.

              fch_txf/s
                     The total number of frames transmitted per second.

              fch_rxw/s
                     The total number of transmission words received per second.

              fch_txw/s
                     The total number of transmission words transmitted per second.

              With the ICMP keyword, statistics about ICMPv4 network traffic are reported.  Note that ICMPv4 statistics  depend  on
              sadc's option "-S SNMP" to be collected.  The following values are displayed (formal SNMP names between square brack‐
              ets):

              imsg/s
                     The total number of ICMP messages which the entity received per second [icmpInMsgs].  Note that  this  counter
                     includes all those counted by ierr/s.

              omsg/s
                     The  total  number  of  ICMP messages which this entity attempted to send per second [icmpOutMsgs].  Note that
                     this counter includes all those counted by oerr/s.

              iech/s
                     The number of ICMP Echo (request) messages received per second [icmpInEchos].

              iechr/s
                     The number of ICMP Echo Reply messages received per second [icmpInEchoReps].

              oech/s
                     The number of ICMP Echo (request) messages sent per second [icmpOutEchos].

              oechr/s
                     The number of ICMP Echo Reply messages sent per second [icmpOutEchoReps].

              itm/s
                     The number of ICMP Timestamp (request) messages received per second [icmpInTimestamps].

              itmr/s
                     The number of ICMP Timestamp Reply messages received per second [icmpInTimestampReps].

              otm/s
                     The number of ICMP Timestamp (request) messages sent per second [icmpOutTimestamps].

              otmr/s
                     The number of ICMP Timestamp Reply messages sent per second [icmpOutTimestampReps].

              iadrmk/s
                     The number of ICMP Address Mask Request messages received per second [icmpInAddrMasks].

              iadrmkr/s
                     The number of ICMP Address Mask Reply messages received per second [icmpInAddrMaskReps].

              oadrmk/s
                     The number of ICMP Address Mask Request messages sent per second [icmpOutAddrMasks].

              oadrmkr/s
                     The number of ICMP Address Mask Reply messages sent per second [icmpOutAddrMaskReps].

              With the EICMP keyword, statistics about ICMPv4 error messages are reported.  Note that ICMPv4 statistics  depend  on
              sadc's option "-S SNMP" to be collected.  The following values are displayed (formal SNMP names between square brack‐
              ets):

              ierr/s
                     The number of ICMP messages per second which the entity received but determined as having ICMP-specific errors
                     (bad ICMP checksums, bad length, etc.) [icmpInErrors].

              oerr/s
                     The  number  of ICMP messages per second which this entity did not send due to problems discovered within ICMP
                     such as a lack of buffers [icmpOutErrors].

              idstunr/s
                     The number of ICMP Destination Unreachable messages received per second [icmpInDestUnreachs].

              odstunr/s
                     The number of ICMP Destination Unreachable messages sent per second [icmpOutDestUnreachs].

              itmex/s
                     The number of ICMP Time Exceeded messages received per second [icmpInTimeExcds].

              otmex/s
                     The number of ICMP Time Exceeded messages sent per second [icmpOutTimeExcds].

              iparmpb/s
                     The number of ICMP Parameter Problem messages received per second [icmpInParmProbs].

              oparmpb/s
                     The number of ICMP Parameter Problem messages sent per second [icmpOutParmProbs].

              isrcq/s
                     The number of ICMP Source Quench messages received per second [icmpInSrcQuenchs].

              osrcq/s
                     The number of ICMP Source Quench messages sent per second [icmpOutSrcQuenchs].

              iredir/s
                     The number of ICMP Redirect messages received per second [icmpInRedirects].

              oredir/s
                     The number of ICMP Redirect messages sent per second [icmpOutRedirects].

              With the ICMP6 keyword, statistics about ICMPv6 network traffic are reported.  Note that ICMPv6 statistics depend  on
              sadc's option "-S IPV6" to be collected.  The following values are displayed (formal SNMP names between square brack‐
              ets):

              imsg6/s
                     The total number of ICMP messages received by the interface per second which includes  all  those  counted  by
                     ierr6/s [ipv6IfIcmpInMsgs].

              omsg6/s
                     The total number of ICMP messages which this interface attempted to send per second [ipv6IfIcmpOutMsgs].

              iech6/s
                     The number of ICMP Echo (request) messages received by the interface per second [ipv6IfIcmpInEchos].

              iechr6/s
                     The number of ICMP Echo Reply messages received by the interface per second [ipv6IfIcmpInEchoReplies].

              oechr6/s
                     The number of ICMP Echo Reply messages sent by the interface per second [ipv6IfIcmpOutEchoReplies].

              igmbq6/s
                     The  number of ICMPv6 Group Membership Query messages received by the interface per second [ipv6IfIcmpInGroup‐
                     MembQueries].

              igmbr6/s
                     The number of ICMPv6 Group Membership Response messages received by the interface  per  second  [ipv6IfIcmpIn‐
                     GroupMembResponses].

              ogmbr6/s
                     The number of ICMPv6 Group Membership Response messages sent per second [ipv6IfIcmpOutGroupMembResponses].

              igmbrd6/s
                     The  number  of ICMPv6 Group Membership Reduction messages received by the interface per second [ipv6IfIcmpIn‐
                     GroupMembReductions].

              ogmbrd6/s
                     The number of ICMPv6 Group Membership Reduction messages sent per second [ipv6IfIcmpOutGroupMembReductions].

              irtsol6/s
                     The number of ICMP Router Solicit messages received by the interface per second [ipv6IfIcmpInRouterSolicits].

              ortsol6/s
                     The number of ICMP Router Solicitation messages sent by the interface  per  second  [ipv6IfIcmpOutRouterSolic‐
                     its].

              irtad6/s
                     The  number  of ICMP Router Advertisement messages received by the interface per second [ipv6IfIcmpInRouterAd‐
                     vertisements].

              inbsol6/s
                     The number of ICMP Neighbor Solicit messages received by the interface per second  [ipv6IfIcmpInNeighborSolic‐
                     its].

              onbsol6/s
                     The  number  of ICMP Neighbor Solicitation messages sent by the interface per second [ipv6IfIcmpOutNeighborSo‐
                     licits].

              inbad6/s
                     The number of ICMP Neighbor Advertisement messages received by the interface per second  [ipv6IfIcmpInNeighbo‐
                     rAdvertisements].

              onbad6/s
                     The  number of ICMP Neighbor Advertisement messages sent by the interface per second [ipv6IfIcmpOutNeighborAd‐
                     vertisements].

              With the EICMP6 keyword, statistics about ICMPv6 error messages are reported.  Note that ICMPv6 statistics depend  on
              sadc's option "-S IPV6" to be collected.  The following values are displayed (formal SNMP names between square brack‐
              ets):

              ierr6/s
                     The number of ICMP messages per second which the interface received but determined as having ICMP-specific er‐
                     rors (bad ICMP checksums, bad length, etc.)  [ipv6IfIcmpInErrors]

              idtunr6/s
                     The  number of ICMP Destination Unreachable messages received by the interface per second [ipv6IfIcmpInDestUn‐
                     reachs].

              odtunr6/s
                     The number of ICMP Destination Unreachable messages sent by the  interface  per  second  [ipv6IfIcmpOutDestUn‐
                     reachs].

              itmex6/s
                     The number of ICMP Time Exceeded messages received by the interface per second [ipv6IfIcmpInTimeExcds].

              otmex6/s
                     The number of ICMP Time Exceeded messages sent by the interface per second [ipv6IfIcmpOutTimeExcds].

              iprmpb6/s
                     The number of ICMP Parameter Problem messages received by the interface per second [ipv6IfIcmpInParmProblems].

              oprmpb6/s
                     The number of ICMP Parameter Problem messages sent by the interface per second [ipv6IfIcmpOutParmProblems].

              iredir6/s
                     The number of Redirect messages received by the interface per second [ipv6IfIcmpInRedirects].

              oredir6/s
                     The number of Redirect messages sent by the interface by second [ipv6IfIcmpOutRedirects].

              ipck2b6/s
                     The number of ICMP Packet Too Big messages received by the interface per second [ipv6IfIcmpInPktTooBigs].

              opck2b6/s
                     The number of ICMP Packet Too Big messages sent by the interface per second [ipv6IfIcmpOutPktTooBigs].

              With  the IP keyword, statistics about IPv4 network traffic are reported.  Note that IPv4 statistics depend on sadc's
              option "-S SNMP" to be collected.  The following values are displayed (formal SNMP names between square brackets):

              irec/s
                     The total number of input datagrams received from interfaces per second, including  those  received  in  error
                     [ipInReceives].

              fwddgm/s
                     The  number  of input datagrams per second, for which this entity was not their final IP destination, as a re‐
                     sult of which an attempt was made to find a route to forward them to that final destination [ipForwDatagrams].

              idel/s
                     The total number of input datagrams successfully delivered per second to IP  user-protocols  (including  ICMP)
                     [ipInDelivers].

              orq/s
                     The  total  number of IP datagrams which local IP user-protocols (including ICMP) supplied per second to IP in
                     requests for transmission [ipOutRequests].  Note that this counter does not include any datagrams  counted  in
                     fwddgm/s.

              asmrq/s
                     The number of IP fragments received per second which needed to be reassembled at this entity [ipReasmReqds].

              asmok/s
                     The number of IP datagrams successfully re-assembled per second [ipReasmOKs].

              fragok/s
                     The number of IP datagrams that have been successfully fragmented at this entity per second [ipFragOKs].

              fragcrt/s
                     The  number  of IP datagram fragments that have been generated per second as a result of fragmentation at this
                     entity [ipFragCreates].

              With the EIP keyword, statistics about IPv4 network errors are reported.  Note that IPv4 statistics depend on  sadc's
              option "-S SNMP" to be collected.  The following values are displayed (formal SNMP names between square brackets):

              ihdrerr/s
                     The number of input datagrams discarded per second due to errors in their IP headers, including bad checksums,
                     version number mismatch, other format errors, time-to-live exceeded, errors discovered in processing their  IP
                     options, etc. [ipInHdrErrors]

              iadrerr/s
                     The  number  of  input  datagrams discarded per second because the IP address in their IP header's destination
                     field was not a valid address to be received at this entity. This  count  includes  invalid  addresses  (e.g.,
                     0.0.0.0)  and  addresses  of  unsupported  Classes  (e.g., Class E). For entities which are not IP routers and
                     therefore do not forward datagrams, this counter includes datagrams discarded because the destination  address
                     was not a local address [ipInAddrErrors].

              iukwnpr/s
                     The number of locally-addressed datagrams received successfully but discarded per second because of an unknown
                     or unsupported protocol [ipInUnknownProtos].

              idisc/s
                     The number of input IP datagrams per second for which no problems were encountered to prevent their  continued
                     processing,  but which were discarded (e.g., for lack of buffer space) [ipInDiscards].  Note that this counter
                     does not include any datagrams discarded while awaiting re-assembly.

              odisc/s
                     The number of output IP datagrams per second for which no problem was encountered to prevent  their  transmis‐
                     sion  to  their  destination, but which were discarded (e.g., for lack of buffer space) [ipOutDiscards].  Note
                     that this counter would include datagrams counted in fwddgm/s if any such  packets  met  this  (discretionary)
                     discard criterion.

              onort/s
                     The number of IP datagrams discarded per second because no route could be found to transmit them to their des‐
                     tination [ipOutNoRoutes].  Note that this counter includes any packets counted in  fwddgm/s  which  meet  this
                     'no-route'  criterion.  Note that this includes any datagrams which a host cannot route because all of its de‐
                     fault routers are down.

              asmf/s
                     The number of failures detected per second by the IP re-assembly algorithm (for whatever  reason:  timed  out,
                     errors,  etc)  [ipReasmFails].  Note that this is not necessarily a count of discarded IP fragments since some
                     algorithms can lose track of the number of fragments by combining them as they are received.

              fragf/s
                     The number of IP datagrams that have been discarded per second because they needed to be  fragmented  at  this
                     entity but could not be, e.g., because their Don't Fragment flag was set [ipFragFails].

              With the IP6 keyword, statistics about IPv6 network traffic are reported.  Note that IPv6 statistics depend on sadc's
              option "-S IPV6" to be collected.  The following values are displayed (formal SNMP names between square brackets):

              irec6/s
                     The total number of input datagrams received from interfaces per second, including  those  received  in  error
                     [ipv6IfStatsInReceives].

              fwddgm6/s
                     The number of output datagrams per second which this entity received and forwarded to their final destinations
                     [ipv6IfStatsOutForwDatagrams].

              idel6/s
                     The total number of datagrams successfully delivered  per  second  to  IPv6  user-protocols  (including  ICMP)
                     [ipv6IfStatsInDelivers].

              orq6/s
                     The  total  number  of  IPv6 datagrams which local IPv6 user-protocols (including ICMP) supplied per second to
                     IPv6 in requests for transmission [ipv6IfStatsOutRequests].  Note that this counter does not include any data‐
                     grams counted in fwddgm6/s.

              asmrq6/s
                     The number of IPv6 fragments received per second which needed to be reassembled at this interface [ipv6IfStat‐
                     sReasmReqds].

              asmok6/s
                     The number of IPv6 datagrams successfully reassembled per second [ipv6IfStatsReasmOKs].

              imcpck6/s
                     The number of multicast packets received per second by the interface [ipv6IfStatsInMcastPkts].

              omcpck6/s
                     The number of multicast packets transmitted per second by the interface [ipv6IfStatsOutMcastPkts].

              fragok6/s
                     The number of IPv6 datagrams that have been successfully  fragmented  at  this  output  interface  per  second
                     [ipv6IfStatsOutFragOKs].

              fragcr6/s
                     The  number  of  output datagram fragments that have been generated per second as a result of fragmentation at
                     this output interface [ipv6IfStatsOutFragCreates].

              With the EIP6 keyword, statistics about IPv6 network errors are reported.  Note that IPv6 statistics depend on sadc's
              option "-S IPV6" to be collected.  The following values are displayed (formal SNMP names between square brackets):

              ihdrer6/s
                     The number of input datagrams discarded per second due to errors in their IPv6 headers, including version num‐
                     ber mismatch, other format errors, hop count exceeded, errors discovered in  processing  their  IPv6  options,
                     etc. [ipv6IfStatsInHdrErrors]

              iadrer6/s
                     The number of input datagrams discarded per second because the IPv6 address in their IPv6 header's destination
                     field was not a valid address to be received at this entity. This count includes invalid addresses (e.g., ::0)
                     and unsupported addresses (e.g., addresses with unallocated prefixes). For entities which are not IPv6 routers
                     and therefore do not forward datagrams, this counter includes datagrams discarded because the destination  ad‐
                     dress was not a local address [ipv6IfStatsInAddrErrors].

              iukwnp6/s
                     The number of locally-addressed datagrams received successfully but discarded per second because of an unknown
                     or unsupported protocol [ipv6IfStatsInUnknownProtos].

              i2big6/s
                     The number of input datagrams that could not be forwarded per second because their size exceeded the link  MTU
                     of outgoing interface [ipv6IfStatsInTooBigErrors].

              idisc6/s
                     The  number of input IPv6 datagrams per second for which no problems were encountered to prevent their contin‐
                     ued processing, but which were discarded (e.g., for lack of buffer space) [ipv6IfStatsInDiscards].  Note  that
                     this counter does not include any datagrams discarded while awaiting re-assembly.

              odisc6/s
                     The number of output IPv6 datagrams per second for which no problem was encountered to prevent their transmis‐
                     sion to their destination, but which were discarded (e.g., for lack of buffer space) [ipv6IfStatsOutDiscards].
                     Note  that  this  counter  would  include datagrams counted in fwddgm6/s if any such packets met this (discre‐
                     tionary) discard criterion.

              inort6/s
                     The number of input datagrams discarded per second because no route could be found to transmit them  to  their
                     destination [ipv6IfStatsInNoRoutes].

              onort6/s
                     The  number of locally generated IP datagrams discarded per second because no route could be found to transmit
                     them to their destination [unknown formal SNMP name].

              asmf6/s
                     The number of failures detected per second by the IPv6 re-assembly algorithm (for whatever reason: timed  out,
                     errors,  etc.) [ipv6IfStatsReasmFails].  Note that this is not necessarily a count of discarded IPv6 fragments
                     since some algorithms can lose track of the number of fragments by combining them as they are received.

              fragf6/s
                     The number of IPv6 datagrams that have been discarded per second because they needed to be fragmented at  this
                     output interface but could not be [ipv6IfStatsOutFragFails].

              itrpck6/s
                     The  number  of input datagrams discarded per second because datagram frame didn't carry enough data [ipv6IfS‐
                     tatsInTruncatedPkts].

              With the NFS keyword, statistics about NFS client activity are reported.  The following values are displayed:

              call/s
                     Number of RPC requests made per second.

              retrans/s
                     Number of RPC requests per second, those which needed to be retransmitted (for example  because  of  a  server
                     timeout).

              read/s
                     Number of 'read' RPC calls made per second.

              write/s
                     Number of 'write' RPC calls made per second.

              access/s
                     Number of 'access' RPC calls made per second.

              getatt/s
                     Number of 'getattr' RPC calls made per second.

              With the NFSD keyword, statistics about NFS server activity are reported.  The following values are displayed:

              scall/s
                     Number of RPC requests received per second.

              badcall/s
                     Number of bad RPC requests received per second, those whose processing generated an error.

              packet/s
                     Number of network packets received per second.

              udp/s
                     Number of UDP packets received per second.

              tcp/s
                     Number of TCP packets received per second.

              hit/s
                     Number of reply cache hits per second.

              miss/s
                     Number of reply cache misses per second.

              sread/s
                     Number of 'read' RPC calls received per second.

              swrite/s
                     Number of 'write' RPC calls received per second.

              saccess/s
                     Number of 'access' RPC calls received per second.

              sgetatt/s
                     Number of 'getattr' RPC calls received per second.

              With the SOCK keyword, statistics on sockets in use are reported (IPv4).  The following values are displayed:

              totsck
                     Total number of sockets used by the system.

              tcpsck
                     Number of TCP sockets currently in use.

              udpsck
                     Number of UDP sockets currently in use.

              rawsck
                     Number of RAW sockets currently in use.

              ip-frag
                     Number of IP fragments currently in queue.

              tcp-tw
                     Number of TCP sockets in TIME_WAIT state.

              With the SOCK6 keyword, statistics on sockets in use are reported (IPv6).  Note that IPv6 statistics depend on sadc's
              option "-S IPV6" to be collected.  The following values are displayed:

              tcp6sck
                     Number of TCPv6 sockets currently in use.

              udp6sck
                     Number of UDPv6 sockets currently in use.

              raw6sck
                     Number of RAWv6 sockets currently in use.

              ip6-frag
                     Number of IPv6 fragments currently in use.

              With the SOFT keyword, statistics about software-based network processing are reported.   The  following  values  are
              displayed:

              total/s
                     The total number of network frames processed per second.

              dropd/s
                     The total number of network frames dropped per second because there was no room on the processing queue.

              squeezd/s
                     The  number of times the softirq handler function terminated per second because its budget was consumed or the
                     time limit was reached, but more work could have been done.

              rx_rps/s
                     The number of times the CPU has been woken up per second to process packets via an inter-processor interrupt.

              flw_lim/s
                     The number of times the flow limit has been reached per second.  Flow limiting is an optional RPS feature that
                     can  be used to limit the number of packets queued to the backlog for each flow to a certain amount.  This can
                     help ensure that smaller flows are processed even though much larger flows are pushing packets in.

              With the TCP keyword, statistics about TCPv4 network traffic are reported.  Note  that  TCPv4  statistics  depend  on
              sadc's option "-S SNMP" to be collected.  The following values are displayed (formal SNMP names between square brack‐
              ets):

              active/s
                     The number of times TCP connections have made a direct transition to the SYN-SENT state from the CLOSED  state
                     per second [tcpActiveOpens].

              passive/s
                     The  number of times TCP connections have made a direct transition to the SYN-RCVD state from the LISTEN state
                     per second [tcpPassiveOpens].

              iseg/s
                     The total number of segments received per second, including those received in error [tcpInSegs].   This  count
                     includes segments received on currently established connections.

              oseg/s
                     The  total number of segments sent per second, including those on current connections but excluding those con‐
                     taining only retransmitted octets [tcpOutSegs].

              With the ETCP keyword, statistics about TCPv4 network errors are reported.  Note  that  TCPv4  statistics  depend  on
              sadc's option "-S SNMP" to be collected.  The following values are displayed (formal SNMP names between square brack‐
              ets):

              atmptf/s
                     The number of times per second TCP connections have made a direct transition to the CLOSED state  from  either
                     the  SYN-SENT state or the SYN-RCVD state, plus the number of times per second TCP connections have made a di‐
                     rect transition to the LISTEN state from the SYN-RCVD state [tcpAttemptFails].

              estres/s
                     The number of times per second TCP connections have made a direct transition to the CLOSED state  from  either
                     the ESTABLISHED state or the CLOSE-WAIT state [tcpEstabResets].

              retrans/s
                     The  total  number of segments retransmitted per second - that is, the number of TCP segments transmitted con‐
                     taining one or more previously transmitted octets [tcpRetransSegs].

              isegerr/s
                     The total number of segments received in error (e.g., bad TCP checksums) per second [tcpInErrs].

              orsts/s
                     The number of TCP segments sent per second containing the RST flag [tcpOutRsts].

              With the UDP keyword, statistics about UDPv4 network traffic are reported.  Note  that  UDPv4  statistics  depend  on
              sadc's option "-S SNMP" to be collected.  The following values are displayed (formal SNMP names between square brack‐
              ets):

              idgm/s
                     The total number of UDP datagrams delivered per second to UDP users [udpInDatagrams].

              odgm/s
                     The total number of UDP datagrams sent per second from this entity [udpOutDatagrams].

              noport/s
                     The total number of received UDP datagrams per second for which there was no application  at  the  destination
                     port [udpNoPorts].

              idgmerr/s
                     The number of received UDP datagrams per second that could not be delivered for reasons other than the lack of
                     an application at the destination port [udpInErrors].

              With the UDP6 keyword, statistics about UDPv6 network traffic are reported.  Note that  UDPv6  statistics  depend  on
              sadc's option "-S IPV6" to be collected.  The following values are displayed (formal SNMP names between square brack‐
              ets):

              idgm6/s
                     The total number of UDP datagrams delivered per second to UDP users [udpInDatagrams].

              odgm6/s
                     The total number of UDP datagrams sent per second from this entity [udpOutDatagrams].

              noport6/s
                     The total number of received UDP datagrams per second for which there was no application  at  the  destination
                     port [udpNoPorts].

              idgmer6/s
                     The number of received UDP datagrams per second that could not be delivered for reasons other than the lack of
                     an application at the destination port [udpInErrors].

              The ALL keyword is equivalent to specifying all the keywords above and therefore all the network activities  are  re‐
              ported.

       -o [ filename ]
              Save the readings in the file in binary form. Each reading is in a separate record. The default value of the filename
              parameter is the current standard system activity daily data file.  If filename is a directory  instead  of  a  plain
              file  then it is considered as the directory where the standard system activity daily data files are located.  The -o
              option is exclusive of the -f option.  All the data available from the kernel are saved in the  file  (in  fact,  sar
              calls its data collector sadc with the option "-S ALL".  See sadc(8) manual page).

       -P { cpu_list | ALL }
              Report  per-processor  statistics  for  the specified processor or processors.  cpu_list is a list of comma-separated
              values or range of values (e.g., 0,2,4-7,12-).  Note that processor 0 is the first processor, and  processor  all  is
              the  global  average among all processors.  Specifying the ALL keyword reports statistics for each individual proces‐
              sor, and globally for all processors. Offline processors are not displayed.

       -p     Pretty-print device names. Use this option in conjunction with option -d.  By default names  are  printed  as  devM-n
              where  M  and n are the major and minor numbers for the device.  Use of this option displays the names of the devices
              as they (should) appear in /dev. Name mappings are controlled by /etc/sysstat/sysstat.ioconf.

       -q     Report queue length and load averages. The following values are displayed:

              runq-sz
                     Run queue length (number of tasks waiting for run time).

              plist-sz
                     Number of tasks in the task list.

              ldavg-1
                     System load average for the last minute.  The load average is calculated as the average number of runnable  or
                     running  tasks (R state), and the number of tasks in uninterruptible sleep (D state) over the specified inter‐
                     val.

              ldavg-5
                     System load average for the past 5 minutes.

              ldavg-15
                     System load average for the past 15 minutes.

              blocked
                     Number of tasks currently blocked, waiting for I/O to complete.

       -r [ ALL ]
              Report memory utilization statistics. The ALL keyword indicates that all the memory fields should be displayed.   The
              following values may be displayed:

              kbmemfree
                     Amount of free memory available in kilobytes.

              kbavail
                     Estimate  of  how  much memory in kilobytes is available for starting new applications, without swapping.  The
                     estimate takes into account that the system needs some page cache to function  well,  and  that  not  all  re‐
                     claimable slab will be reclaimable, due to items being in use. The impact of those factors will vary from sys‐
                     tem to system.

              kbmemused
                     Amount of used memory in kilobytes (calculated as total installed memory - kbmemfree - kbbuffers - kbcached  -
                     kbslab).

              %memused
                     Percentage of used memory.

              kbbuffers
                     Amount of memory used as buffers by the kernel in kilobytes.

              kbcached
                     Amount of memory used to cache data by the kernel in kilobytes.

              kbcommit
                     Amount  of memory in kilobytes needed for current workload. This is an estimate of how much RAM/swap is needed
                     to guarantee that there never is out of memory.

              %commit
                     Percentage of memory needed for current workload in relation to the total amount of memory  (RAM+swap).   This
                     number may be greater than 100% because the kernel usually overcommits memory.

              kbactive
                     Amount of active memory in kilobytes (memory that has been used more recently and usually not reclaimed unless
                     absolutely necessary).

              kbinact
                     Amount of inactive memory in kilobytes (memory which has been less recently used. It is more  eligible  to  be
                     reclaimed for other purposes).

              kbdirty
                     Amount of memory in kilobytes waiting to get written back to the disk.

              kbanonpg
                     Amount of non-file backed pages in kilobytes mapped into userspace page tables.

              kbslab
                     Amount of memory in kilobytes used by the kernel to cache data structures for its own use.

              kbkstack
                     Amount of memory in kilobytes used for kernel stack space.

              kbpgtbl
                     Amount of memory in kilobytes dedicated to the lowest level of page tables.

              kbvmused
                     Amount of memory in kilobytes of used virtual address space.

       -S     Report swap space utilization statistics.  The following values are displayed:

              kbswpfree
                     Amount of free swap space in kilobytes.

              kbswpused
                     Amount of used swap space in kilobytes.

              %swpused
                     Percentage of used swap space.

              kbswpcad
                     Amount  of  cached swap memory in kilobytes.  This is memory that once was swapped out, is swapped back in but
                     still also is in the swap area (if memory is needed it doesn't need to be swapped out again because it is  al‐
                     ready in the swap area. This saves I/O).

              %swpcad
                     Percentage of cached swap memory in relation to the amount of used swap space.

       -s [ hh:mm[:ss] ]
              Set  the starting time of the data, causing the sar command to extract records time-tagged at, or following, the time
              specified. The default starting time is 08:00:00.  Hours must be given in 24-hour format. This  option  can  be  used
              only when data are read from a file (option -f).

       --sadc Indicate  which  data collector is called by sar.  If the data collector is sought in PATH then enter "which sadc" to
              know where it is located.

       -t     When reading data from a daily data file, indicate that sar should display the timestamps in the original local  time
              of the data file creator. Without this option, the sar command displays the timestamps in the user's locale time.

       -u [ ALL ]
              Report  CPU  utilization. The ALL keyword indicates that all the CPU fields should be displayed.  The report may show
              the following fields:

              %user
                     Percentage of CPU utilization that occurred while executing at the user level (application).  Note  that  this
                     field includes time spent running virtual processors.

              %usr
                     Percentage  of  CPU  utilization that occurred while executing at the user level (application). Note that this
                     field does NOT include time spent running virtual processors.

              %nice
                     Percentage of CPU utilization that occurred while executing at the user level with nice priority.

              %system
                     Percentage of CPU utilization that occurred while executing at the system level (kernel). Note that this field
                     includes time spent servicing hardware and software interrupts.

              %sys
                     Percentage of CPU utilization that occurred while executing at the system level (kernel). Note that this field
                     does NOT include time spent servicing hardware or software interrupts.

              %iowait
                     Percentage of time that the CPU or CPUs were idle during which the system had an outstanding disk I/O request.

              %steal
                     Percentage of time spent in involuntary wait by the virtual CPU or CPUs while the hypervisor was servicing an‐
                     other virtual processor.

              %irq
                     Percentage of time spent by the CPU or CPUs to service hardware interrupts.

              %soft
                     Percentage of time spent by the CPU or CPUs to service software interrupts.

              %guest
                     Percentage of time spent by the CPU or CPUs to run a virtual processor.

              %gnice
                     Percentage of time spent by the CPU or CPUs to run a niced guest.

              %idle
                     Percentage of time that the CPU or CPUs were idle and the system did not have an outstanding disk I/O request.

       -V     Print version number then exit.

       -v     Report status of inode, file and other kernel tables.  The following values are displayed:

              dentunusd
                     Number of unused cache entries in the directory cache.

              file-nr
                     Number of file handles used by the system.

              inode-nr
                     Number of inode handlers used by the system.

              pty-nr
                     Number of pseudo-terminals used by the system.

       -W     Report swapping statistics. The following values are displayed:

              pswpin/s
                     Total number of swap pages the system brought in per second.

              pswpout/s
                     Total number of swap pages the system brought out per second.

       -w     Report task creation and system switching activity.

              proc/s
                     Total number of tasks created per second.

              cswch/s
                     Total number of context switches per second.

       -y     Report TTY devices activity. The following values are displayed:

              rcvin/s
                     Number  of  receive interrupts per second for current serial line. Serial line number is given in the TTY col‐
                     umn.

              xmtin/s
                     Number of transmit interrupts per second for current serial line.

              framerr/s
                     Number of frame errors per second for current serial line.

              prtyerr/s
                     Number of parity errors per second for current serial line.

              brk/s
                     Number of breaks per second for current serial line.

              ovrun/s
                     Number of overrun errors per second for current serial line.

       -z     Tell sar to omit output for any devices for which there was no activity during the sample period.

ENVIRONMENT
       The sar command takes into account the following environment variables:

       S_COLORS
              When this variable is set, display statistics in color on the terminal.  Possible values for this variable are never,
              always or auto (the latter is the default).

              Note:  On  Debian sysstems the colors are displayed by default when output is connected to the terminal, even if this
              variable is not set (i.e. unset variable is treated as if it were set to auto).

              Please note that the color (being red, yellow, or some other color) used to display a value is not indicative of  any
              kind of issue simply because of the color. It only indicates different ranges of values.

       S_COLORS_SGR
              Specify  the  colors and other attributes used to display statistics on the terminal.  Its value is a colon-separated
              list of capabilities that defaults to C=33;22:H=31;1:I=32;22:M=35;1:N=34;1:R=31;22:Z=34;22.   Supported  capabilities
              are:

              C=     SGR (Select Graphic Rendition) substring for comments inserted in the binary daily data files.

              H=     SGR substring for percentage values greater than or equal to 75%.

              I=     SGR substring for item names or values (eg. network interfaces, CPU number...)

              M=     SGR substring for percentage values in the range from 50% to 75%.

              N=     SGR substring for non-zero statistics values.

              R=     SGR substring for restart messages.

              Z=     SGR substring for zero values.

       S_TIME_DEF_TIME
              If this variable exists and its value is UTC then sar will save its data in UTC time (data will still be displayed in
              local time).  sar will also use UTC time instead of local time to determine the current daily data  file  located  in
              the /var/log/sysstat directory. This variable may be useful for servers with users located across several timezones.

       S_TIME_FORMAT
              If  this  variable  exists and its value is ISO then the current locale will be ignored when printing the date in the
              report header.  The sar command will use the ISO 8601 format (YYYY-MM-DD) instead.  The timestamp will also  be  com‐
              pliant with ISO 8601 format.

EXAMPLES
       sar -u 2 5
              Report CPU utilization for each 2 seconds. 5 lines are displayed.

       sar -I 14 -o int14.file 2 10
              Report statistics on IRQ 14 for each 2 seconds. 10 lines are displayed.  Data are stored in a file called int14.file.

       sar -r -n DEV -f /var/log/sysstat/sa16
              Display memory and network statistics saved in daily data file 'sa16'.

       sar -A
              Display all the statistics saved in current daily data file.

BUGS
       /proc filesystem must be mounted for the sar command to work.

       All  the  statistics are not necessarily available, depending on the kernel version used.  sar assumes that you are using at
       least a 2.6 kernel.

FILES
       /var/log/sysstat/saDD
       /var/log/sysstat/saYYYYMMDD
              The standard system activity daily data files and their default location.  YYYY stands for the current year,  MM  for
              the current month and DD for the current day.

       /proc and /sys contain various files with system statistics.

AUTHOR
       Sebastien Godard (sysstat <at> orange.fr)

SEE ALSO
       sadc(8), sa1(8), sa2(8), sadf(1), sysstat(5), pidstat(1), mpstat(1), iostat(1), vmstat(8)

       https://github.com/sysstat/sysstat

       http://pagesperso-orange.fr/sebastien.godard/

Linux                                                       OCTOBER 2018                                                     SAR(1)

 

 

Súgó kimenet

sar --help
Használat: sar [ kapcsolók ] [ <időköz> [ <darabszám> ] ]
Main options and reports (report name between square brackets):
        -B      Paging statistics [A_PAGE]
        -b      I/O and transfer rate statistics [A_IO]
        -d      Block devices statistics [A_DISK]
        -F [ MOUNT ]
                Filesystems statistics [A_FS]
        -H      Hugepages utilization statistics [A_HUGE]
        -I { <int_list> | SUM | ALL }
                Interrupts statistics [A_IRQ]
        -m { <keyword> [,...] | ALL }
                Power management statistics [A_PWR_...]
                Keywords are:
                CPU     CPU instantaneous clock frequency
                FAN     Fans speed
                FREQ    CPU average clock frequency
                IN      Voltage inputs
                TEMP    Devices temperature
                USB     USB devices plugged into the system
        -n { <keyword> [,...] | ALL }
                Network statistics [A_NET_...]
                Keywords are:
                DEV     Network interfaces
                EDEV    Network interfaces (errors)
                NFS     NFS client
                NFSD    NFS server
                SOCK    Sockets (v4)
                IP      IP traffic      (v4)
                EIP     IP traffic      (v4) (errors)
                ICMP    ICMP traffic    (v4)
                EICMP   ICMP traffic    (v4) (errors)
                TCP     TCP traffic     (v4)
                ETCP    TCP traffic     (v4) (errors)
                UDP     UDP traffic     (v4)
                SOCK6   Sockets (v6)
                IP6     IP traffic      (v6)
                EIP6    IP traffic      (v6) (errors)
                ICMP6   ICMP traffic    (v6)
                EICMP6  ICMP traffic    (v6) (errors)
                UDP6    UDP traffic     (v6)
                FC      Fibre channel HBAs
                SOFT    Software-based network processing
        -q      Queue length and load average statistics [A_QUEUE]
        -r [ ALL ]
                Memory utilization statistics [A_MEMORY]
        -S      Swap space utilization statistics [A_MEMORY]
        -u [ ALL ]
                CPU utilization statistics [A_CPU]
        -v      Kernel tables statistics [A_KTABLES]
        -W      Swapping statistics [A_SWAP]
        -w      Task creation and system switching statistics [A_PCSW]
        -y      TTY devices statistics [A_SERIAL]

 

Kapcsolódó tartalom

  •  

 

Címkék