sar


SYNOPSIS

       sar [ -A ] [ -B ] [ -b ] [ -C ] [ -d ] [ -H ] [ -h ] [ -p ] [ -q ] [ -R
       ] [ -r ] [ -S ] [ -t ] [ -u [ ALL ] ] [ -V ] [ -v ] [ -W ] [ -w ] [  -y
       ]  [ -I { int [,...] | SUM | ALL | XALL } ] [ -P { cpu [,...] | 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  speci-
       fied  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 parameter, then reports are  generated  continuously.   The  col-
       lected  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, the
       /var/log/sa/sadd file, where the dd  parameter  indicates  the  current
       day.   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  previ-
       ously 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 dis-
       play data of that days ago. For example, -1 will point at the  standard
       system activity file of yesterday.

       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 activity 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.

       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 uti-
       lization is near 100 percent (user + nice + system), the workload  sam-
       pled 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


OPTIONS

       -A     This  is  equivalent to specifying -bBdHqrRSuvwWy -I SUM -I XALL
              -m ALL -n 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 gen-
                     erate I/O, because some page faults can be resolved with-
                     out 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 mem-
                     ory 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:
                     ical devices.

              bread/s
                     Total  amount of data read from the devices in blocks per
                     second.  Blocks are equivalent to sectors  and  therefore
                     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     Report activity for each block device.  When data are displayed,
              the device specification dev m-n is generally used  (  DEV  col-
              umn).   m is the major number of the device and n its minor num-
              ber.  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).  Note  that  disk  activity  depends  on  sadc
              options  "-S DISK" and "-S XDISK" to be collected. The following
              values are displayed:

              tps
                     Indicate the number of transfers  per  second  that  were
                     issued  to  the device.  Multiple logical requests can be
                     combined into a single  I/O  request  to  the  device.  A
                     transfer is of indeterminate size.

              rd_sec/s
                     Number  of  sectors  read  from the device. The size of a
                     sector is 512 bytes.

              wr_sec/s
                     Number of sectors written to the device. The  size  of  a
                     sector is 512 bytes.

              avgrq-sz
                     The  average  size (in sectors) of the requests that were
                     issued to the device.

              avgqu-sz
                     The average queue length of the requests that were issued
                     to the device.

              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 servic-
                     ing them.

              svctm
              can be used when data  are  read  from  or  written  to  a  file
              (options -f or -o ).

       -f [ filename ]
              Extract records from filename (created by the -o filename flag).
              The default value of the filename parameter is the current daily
              data file, the /var/log/sa/sadd file. The -f option is exclusive
              of the -o option.

       -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 allo-
                     cated.

       -h     Display a short help message then exit.

       -I { int [,...] | SUM | ALL | XALL }
              Report statistics for a given interrupt.  int is  the  interrupt
              number.  Specifying  multiple  -I  int parameters on the command
              line will look at multiple independent interrupts.  The SUM key-
              word  indicates that the total number of interrupts received per
              second is to be displayed. The ALL keyword indicates  that  sta-
              tistics from the first 16 interrupts are to be reported, whereas
              the XALL 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 num-
              ber specified by the interval parameter.

       -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  prerequi-
              site is that directory with required persistent 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
                     Fan speed expressed in revolutions per minute.

              drpm
                     This field is calculated as the difference  between  cur-
                     rent 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 kernel
                     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.

                     Product name.

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

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

              With the DEV keyword, statistics from the  network  devices  are
              reported.  The following 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.

              With  the EDEV keyword, statistics on failures (errors) from the
              network devices are reported.  The  following  values  are  dis-
              played:

              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.

                     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 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  time-
                     out).

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

              irec/s
                     The  total number of input datagrams received from inter-
                     faces 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 result 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  deliv-
                     ered  per  second  to  IP user-protocols (including ICMP)
                     [ipInDelivers].

              orq/s
                     The total number of IP datagrams which local IP user-pro-
                     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 gener-
                     ated 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  option  "-S
              SNMP" to be collected.  The following values are displayed (for-
              mal 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, ver-
                     sion 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  suc-
                     cessfully  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 pro-
                     cessing, but which were discarded (e.g., for lack of buf-
                     fer  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 transmission  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  crite-
                     rion.
                     essarily 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  Frag-
                     ment flag was set [ipFragFails].

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

              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 sec-
                     ond [icmpInEchoReps].

              oech/s
                     The number of ICMP Echo (request) messages sent per  sec-
                     ond [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].
                     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 option
              "-S SNMP" to be collected.  The following values  are  displayed
              (formal SNMP names between square brackets):

              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

              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, includ-
                     ing  those  received  in  error  [tcpInSegs].  This count
                     includes segments received on currently established  con-
                     nections.

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

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

              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 direct tran-
                     sition 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 [tcpEstabRe-
                     sets].

              retrans/s
                     The total number of segments retransmitted per  second  -
                     that  is, the number of TCP segments transmitted contain-
                     ing one or more  previously  transmitted  octets  [tcpRe-
                     transSegs].

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

              orsts/s
                     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  SOCK6  keyword,  statistics  on  sockets  in  use  are
              reported  (IPv6).   Note  that  IPv6  statistics  depend on sadc
              option "-S IPV6" to be collected.  The following values are dis-
              played:

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

              irec6/s
                     The total number of input datagrams received from  inter-
                     faces  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) [ipv6IfS-
                     tatsInDelivers].

              orq6/s
                     The total number of IPv6 datagrams which local IPv6 user-
                     protocols (including ICMP) supplied per second to IPv6 in
                     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  [ipv6IfS-
                     tatsOutFragOKs].

              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  option  "-S
              IPV6" to be collected.  The following values are displayed (for-
              mal SNMP names between square brackets):

              ihdrer6/s
                     The number of input datagrams discarded per second due to
                     errors  in  their  IPv6 headers, including version number
                     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 destina-
                     tion 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  unallo-
                     cated  prefixes). For entities which are not IPv6 routers
                     and therefore do  not  forward  datagrams,  this  counter
                     includes  datagrams  discarded  because  the  destination
                     address  was  not  a  local  address  [ipv6IfStatsInAddr-
                     Errors].

              iukwnp6/s
                     The  number  of locally-addressed datagrams received suc-
                     cessfully 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
                     terion.

              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  out-
                     put 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 ICMP6 keyword, statistics about ICMPv6 network traffic
              are reported.  Note that ICMPv6 statistics depend on sadc option
              "-S  IPV6"  to be collected.  The following values are displayed
              (formal SNMP names between square brackets):

              imsg6/s
                     The total number of ICMP messages received by the  inter-
                     face  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].

              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  [ipv6IfIcmpInGroup-
                     MembReductions].

              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 [ipv6IfIcmpOutRouterSolicits].

              irtad6/s
                     The number of ICMP Router Advertisement messages received
                     by the interface per second [ipv6IfIcmpInRouterAdvertise-
                     ments].

              inbsol6/s
                     The number of ICMP Neighbor Solicit messages received  by
                     the interface per second [ipv6IfIcmpInNeighborSolicits].

              onbsol6/s
                     The number of ICMP Neighbor Solicitation messages sent by
                     the interface per second [ipv6IfIcmpOutNeighborSolicits].

              inbad6/s
                     The  number  of  ICMP  Neighbor  Advertisement   messages
                     received by the interface per second [ipv6IfIcmpInNeighb-
                     orAdvertisements].

              onbad6/s
                     The number of ICMP Neighbor Advertisement  messages  sent
                     by  the interface per second [ipv6IfIcmpOutNeighborAdver-
                     tisements].

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

              ierr6/s
                     The  number  of ICMP messages per second which the inter-
                     face received  but  determined  as  having  ICMP-specific
                     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  UDP6  keyword, statistics about UDPv6 network traffic
              are reported.  Note that UDPv6 statistics depend on sadc  option
              "-S  IPV6"  to be collected.  The following values are displayed
              (formal SNMP names between square brackets):

              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].

              Report  per-processor  statistics for the specified processor or
              processors.  Specifying the ALL keyword reports  statistics  for
              each  individual  processor,  and  globally  for all processors.
              Note that processor 0 is the first processor.

       -p     Pretty-print device names. Use this option in  conjunction  with
              option  -d.  By default names are printed as dev m-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/sysconfig/sys-
              stat.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  aver-
                     age  is  calculated  as the average number of runnable or
                     running tasks (R state), and the number of tasks in unin-
                     terruptible sleep (D state) over the specified interval.

              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     Report memory statistics. The following values are displayed:

              frmpg/s
                     Number of memory pages freed by the system per second.  A
                     negative  value represents a number of pages allocated by
                     the system.  Note that a page has a size of 4 kB or 8  kB
                     according to the machine architecture.

              bufpg/s
                     Number  of additional memory pages used as buffers by the
                     system per second.  A negative value  means  fewer  pages
                     used as buffers by the system.

              campg/s
                     Number  of  additional  memory pages cached by the system
                     Percentage of used memory.

              kbbuffers
                     Amount  of  memory used as buffers by the kernel in kilo-
                     bytes.

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

              kbcommit
                     Amount  of  memory  in kilobytes needed for current work-
                     load. 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 rela-
                     tion to the total amount of memory (RAM+swap).  This num-
                     ber  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.

       -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  mem-
                     ory  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

              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 follow-
              ing fields:

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

              %usr
                     Percentage of CPU utilization that occurred while execut-
                     ing 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 execut-
                     ing at the user level with nice priority.

              %system
                     Percentage of CPU utilization that occurred while execut-
                     ing 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 execut-
                     ing  at  the  system level (kernel). Note that this field
                     does NOT include time spent servicing hardware  or  soft-
                     ware 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  vir-
                     tual  CPU  or  CPUs  while  the  hypervisor was servicing
                     another 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.

              cessor.

       -V     Print version number then exit.

       -v     Report  status of inode, file and other kernel tables.  The fol-
              lowing 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 sec-
                     ond.

              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 device 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.


       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.

       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/sa
              directory.  This  variable  may be useful for servers with users
              located across several timezones.


EXAMPLES

       sar -u 2 5
              Report CPU utilization for each 2  seconds.  5  lines  are  dis-
              played.

       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/sa/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 ker-
       nel version used.  sar assumes that you are using at least a  2.6  ker-
       nel.


FILES

       /var/log/sa/sadd
              Indicate the daily data file, where the dd parameter is a number
              representing the day of the month.

       /proc contains various files with system statistics.


AUTHOR

       Sebastien Godard (sysstat <at> orange.fr)


SEE ALSO

       sadc(8), sa1(8), sa2(8),  sadf(1),  pidstat(1),  mpstat(1),  iostat(1),
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