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OpenDarwin 7.2.1 - man page for sadc (opendarwin section 8)

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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 writ-
     ten to ofile if specified.  Otherwise, the binary data is written to stdout.  If the ofile
     file does not exist, it is created, 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 typi-
     cal 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 intervals.  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/sample.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
     sa1(8), sa2(8), sar(1), iostat(8), vm_stat(1), netstat(1), top(1), sc_usage(1), fs_usage(1)

Mac OS X				   Jul 25 2003					 Mac OS X
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