It might be necessary to save sar reports longer than 7 days. This post explains the steps to achieve this goal.
The “sa2” is the script that is responsible for writing a summarized daily activity report. The /usr/lib/sa/sa2 has the following entries:
#!/sbin/sh
# Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T
# All Rights Reserved
# THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T
# The copyright notice above does not evidence any
# actual or intended publication of such source code.
#ident "@(#)sa2.sh 1.4 98/03/26 SMI" /* SVr4.0 1.4 */
# sa2.sh 1.4 of 5/8/89
DATE=`/usr/bin/date +%d`
RPT=/var/adm/sa/sar$DATE
DFILE=/var/adm/sa/sa$DATE
ENDIR=/usr/bin
cd $ENDIR
$ENDIR/sar $* -f $DFILE > $RPT
/usr/bin/find /var/adm/sa \( -name 'sar*' -o -name 'sa*' \) -mtime +7 -exec /usr/bin/rm {} \;
The “-mtime +7” entry shows that it can only keep 7 days of sar report. Changing the value to something else will keep the record longer than 7 days.
Once done modifying the file, refresh your sar SMF service via:
# svcadm refresh svc:/system/sar:default