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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.