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sadc(8)                                  BSD System Manager's Manual                                 sadc(8)

NAME
     sadc -- system activity data collector

SYNOPSIS
     /usr/lib/sa/sadc [-m mode] [t n] [ofile]

DESCRIPTION
     The sadc tool is used to collect cumulative system activity data.  The sample system data is collected
     at intervals t seconds apart, in a loop n times.  The binary sample data is written to ofile if speci-fied. specified.
     fied.  Otherwise, the binary data is written to stdout.  If the ofile file does not exist, it is cre-ated, created,
     ated, otherwise it is truncated.

     sadc is intended to be used as the engine behind the sar(1) command, and is not typically invoked on
     the command line.  Two shell scripts, sa1 and sa2, are provided to drive the typical sampling, saving,
     and reporting process.

OPTIONS
     The following options modify the way data is collected by sadc.

     -m mode  Modify the collection of system statistics as specified by mode.  Currently only one mode is
              supported.

              PPP      By default, the collection of ppp network interface statistics is turned off.  This
                       is because the number of ppp connections can be very high, causing the raw data file
                       to grow unexpectedly large, especially  when samples are collected at short inter-vals. intervals.
                       vals.  Use the PPP mode to turn the collection back on.

EXAMPLES
     /usr/lib/sa/sadc 15 20 /tmp/sample.out

     This call collects 20 samples at 15 second intervals.  The binary data is written to the /tmp/sam-ple.out /tmp/sample.out
     ple.out file

FILES
     /var/log/sa/sadd  Default daily activity file that holds the binary sampling data.  dd are digits that
                       represent the day of the month.
     /usr/lib/sa/sa1   Shell script used to drive the sar data collection.
     /usr/lib/sa/sa2   Shell script used to drive the sar data reporting.

SEE ALSO
     fs_usage(1), netstat(1), sar(1), sc_usage(1), top(1), vm_stat(1), iostat(8), sa1(8), sa2(8)

Mac OS X                                         Jul 25 2003                                        Mac OS X

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