There are graphics, locate to /var/cache/munin/www/localdomain/localhost.localdomain/, that give a historical overview of a Wazo system's activity based on snapshots recorded every 5 minutes. Graphics are available for the following resources :

• cpu-*.png
• entropy-*.png
• interrupts-*.png
• irqstats-*.png
• load-*.png
• memory-*.png
• open_files-*.png
• open_inodes-*.png
• swap-*.png

Each graphic is available with different time range: day, week, month, year

Troubleshooting

Missing graphs

Symptoms:

• daily graphs are missing
• weekly/monthly/yearly graphs stop updating
• a mail is sent from cron every 5 minutes about a "bad magic number"

Cause:

• the machine was forcefully stopped, while munin (responsible for the graphs) was running, resulting in a file corruption

Resolution:

• Run the following command:

  rm /var/lib/munin/htmlconf.storable /var/lib/munin/limits.storable

• The graphs will be restored on the next run of munin, in the next 5 minutes.