Most of this usage is likely polling FDB tables, especially if you have a lot of VLANs. You can disable this.
 
Other than that, switches have slow CPUs and we poll a /lot/ of information. Not much you can do about it!
 
(also, it doens't affect anything, because SNMP is low-priority. CPUs exist to be used, what good does having it sitting idle all the time do?)
 
adam.
 
 
------ Original Message ------
From: "Dash Brousseau" <Dash.Brousseau@FundSERV.com>
To: "'observium@observium.org'" <observium@observium.org>
Sent: 16/10/2014 19:43:26
Subject: [Observium] High CPU SNMP ENGINE
 

I added Obersvium for one of our workstation cisco switch which has most ports filled up

 

WS-C3560X-48

12.2(53)SE2

 

Now the switch gets huge CPU spikes at random times

And it points to SNMP ENGINE

PID Runtime(ms)   Invoked        uSecs         5Sec   1Min   5Min        TTY     Process

263   959593774  37162365      25821 81.62% 19.01%  7.03%   0 SNMP ENGINE  

263   960182122  37166258      25834 75.33% 12.91%  5.58%   0 SNMP ENGINE

 

 

Is there a way to lower the cpu spikes?

Updated Observium? Update Switch OS? ? Limit polling information?

 

12.2.53

Observium CE    0.14.4.5229

Apache 2.2.22 (Ubuntu)

PHP        5.4.9-4ubuntu2.4

MySQL  5.5.34-0ubuntu0.13.04.1

SNMP   NET-SNMP version: 5.4.3

RRDtool                1.4.7

 

 

 

Dash Brousseau

 


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