Ticket #877 (new defect)

Opened 5 months ago

if_ plugin reports anormal values (Petabits !)

Reported by: dooblem Assigned to: nobody
Priority: normal Milestone: Munin 2.0
Component: plugins Version: 1.4.3
Severity: normal Keywords:
Cc:

Description

Hello all,

On some servers, we have problems with the if_ plugin reporting huge anormal values (see the attached graph).

I've seen : http://munin.projects.linpro.no/wiki/HowToWritePlugins#DERIVEvs.COUNTER

It seems that the problem is the COUNTER rrd type used by the plugin. Patching the plugin replacing the COUNTER type by the DERIVE type solved the problem.

On the attached graph, the peaks occur the same time we reboot our server, on a weekly basis. When we reboot the server, /proc/net/dev counters are reset. I think this is the cause of the problem.

Why not patch the if_ plugin to use the DERIVE type ?

Thanks in advance, and for all your work on this great project ! Marc

Attachments

if_bond0-month.png (15.9 kB) - added by dooblem on 03/04/10 15:47:45.

Change History

03/04/10 15:47:45 changed by dooblem

  • attachment if_bond0-month.png added.