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sar(1M)			System Administration Commands		       sar(1M)

NAME
       sar, sa1, sa2, sadc - system activity report package

SYNOPSIS
       /usr/lib/sa/sadc [ t n] [ofile]

       /usr/lib/sa/sa1 [ t n]

       /usr/lib/sa/sa2	[-aAbcdgkmpqruvwy]  [-e time]  [-f filename]  [-i sec]
       [-s time]

DESCRIPTION
       System activity data can be accessed at the special request of  a  user
       (see  sar(1)) and automatically, on a routine basis, as described here.
       The operating system contains several counters that are incremented  as
       various	system	actions occur. These include counters for CPU utiliza‐
       tion, buffer usage, disk and tape I/O activity,	TTY  device  activity,
       switching and system-call activity, file-access, queue activity, inter-
       process communications, and paging. For more general system statistics,
       use iostat(1M), sar(1), or vmstat(1M).

       sadc  and  two shell procedures, sa1 and sa2, are used to sample, save,
       and process this data.

       sadc, the data collector, samples system data n times, with an interval
       of  t  seconds between samples, and writes in binary format to ofile or
       to standard output. The sampling interval t should be  greater  than  5
       seconds;	 otherwise, the activity of sadc itself may affect the sample.
       If t and n are omitted, a special record is written. This facility  can
       be used at system boot time, when booting to a
	multi-user  state, to mark the time at which the counters restart from
       zero.  For  example,  when  accounting  is   enabled,   the   svc:/sys‐
       tem/sar:default	service writes the restart mark to the daily data file
       using the command entry:

       su sys -c "/usr/lib/sa/sadc /var/adm/sa/sa'date +%d'"

       The shell script sa1, a variant of sadc, is used to collect  and	 store
       data  in the binary file /var/adm/sa/sadd, where dd is the current day.
       The arguments t and n cause records to be written n times at an	inter‐
       val  of	t  seconds,  or	 once  if  omitted.  The  following entries in
       /var/spool/cron/crontabs/sys will produce records every 20 minutes dur‐
       ing working hours and hourly otherwise:

       0 * * * 0-6 /usr/lib/sa/sa1
       20,40 8−17 * * 1−5 /usr/lib/sa/sa1

       See crontab(1) for details.

       The  shell  script  sa2, a variant of sar, writes a daily report in the
       file /var/adm/sa/sardd. See the OPTIONS section in sar(1) for an expla‐
       nation	 of    the   various   options.	  The	following   entry   in
       /var/spool/cron/crontabs/sys will report	 important  activities	hourly
       during the working day:

       5 18 * * 1−5 /usr/lib/sa/sa2 -s 8:00 -e 18:01 -i 1200 -A

FILES
       /tmp/sa.adrfl		       address file

       /var/adm/sa/sadd		       Daily data file

       /var/adm/sa/sardd	       Daily report file

       /var/spool/cron/crontabs/sys

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       ┌─────────────────────────────┬─────────────────────────────┐
       │      ATTRIBUTE TYPE	     │	    ATTRIBUTE VALUE	   │
       ├─────────────────────────────┼─────────────────────────────┤
       │Availability		     │SUNWaccu			   │
       └─────────────────────────────┴─────────────────────────────┘

SEE ALSO
       crontab(1),  sag(1), sar(1), svcs(1), timex(1), iostat(1M), svcadm(1M),
       vmstat(1M), attributes(5), smf(5)

       System Administration Guide: Advanced Administration

NOTES
       The sar service is managed by the service management facility,  smf(5),
       under the service identifier:

       svc:/system/sar

       Administrative actions on this service, such as enabling, disabling, or
       requesting restart, can be performed using  svcadm(1M).	The  service's
       status can be queried using the svcs(1) command.

SunOS 5.10			  20 Aug 2004			       sar(1M)
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