To generate periodic records, you need to run the sadc command regularly. The simplest way to do so is uncomment the following lines in the /var/spool/cron/crontab/sys file:
# 0 * * * 0-6 /usr/lib/sa/sa1 # 20,40 8-17 * * 1-5 /usr/lib/sa/sa1 # 5 18 * * 1-5 /usr/lib/sa/sa2 -s 8:00 -e 18:01 -i 1200 -A |
The sys crontab entries do the following:
The first two crontab entries cause a record to be written to the /var/adm/sa/sadd file every 20 minutes from 8 a.m. to 5 p.m., Monday through Friday, and every hour on the hour otherwise.
The third entry writes a record to the /var/adm/sa/sardd file hourly, Monday through Friday, and includes all sar options.
You can change these defaults to meet your needs.