General Information

System utilization reporting.

The following virtual machines will be used:

• server1.example.com (192.168.1.150) → Configure and test system reporting

Finding help in this section.

• standard man pages

  man dstat
  man sar
  man sadf

Dstat is good for real time monitoring and reporting.

Install

yum install dstat

Running dstat with default options

dstat

• Defaults: -cdngy
  • c → cpu
  • d → disk
  • n → network
  • g → page stats
  • y → system stats (interrupts, context switches)

Write stats to a file/report

dstat -tcdm --output system-stats.csv

• t → time
• c → cpu
• d → disk
• m → memory

Sysstat runs periodically and provides historical statistics.

See here for more sar commands.

Install

yum install sysstat

Sysstat config file

• /etc/sysconfig/sysstat
  • Configure history, compression, and compression program

Cron jobs

• /etc/cron.d/sysstat
  • sa1 → System activity every 10 mins by default
  • sa2 → Daily summary

System activity log files

• /var/log/sa/
  • sa## → Number is the day of the month

View info now from a system activity file

sar -urd -f /var/log/sa/sa01

Semi Colon Separated: Print data from a system activity file, redirect to a file to view later

sadf -d /var/log/sa/sa01 -- -urd -n DEV > system-stats.txt

• -d → Print contents of the data file in an easy to ingest by database format (semi colon separated)
• – → sar options will follow
• -u → sar option: CPU usage
• -r → sar option: Memory usage
• d → sar option: Disk usage (d)
• -n DEV → sar option: Network stats from devices