sadc(8) BSD System Manager's Manual sadc(8)
sadc -- system activity data collector
/usr/lib/sa/sadc [-m mode] [t n] [ofile]
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 specified. Other-
wise, 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 typical sampling, saving, and reporting
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.
/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
/var/log/sa/sadd Default daily activity file that holds the binary sam-
pling data. dd are digits that represent the day of
/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.
sa1(8), sa2(8), sar(1), iostat(8), vm_stat(1), netstat(1), top(1),
Mac OS X Jul 25 2003 Mac OS X