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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