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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What you really trying to accomplish here? SNMP is low-priority process it doesn't affect any routing protocol they are have medium priority.
436 Lwe 439C96E8 4733540 1939785 2440 9420/12000 0 SNMP ENGINE
If cpu idle it will allocate all available resource to snmp. Unless you are having problem with routing protocol which cause timeouts, there nothing you should do.
Otherwise upgrade to latest IOS, you seems running ancient version already. But be warned 15.1 upgrade will require firmware update on 3560X platforms it takes about 25mins.
On 16.10.2014 22:43, Dash Brousseau wrote:
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
This message contains information which may be confidential and privileged. Unless you are the intended addressee (or authorized to receive for the intended addressee), you may not use, copy or disclose to anyone the message or any information contained in the message. If you have received the message in error, please advise the sender by e-mail then delete the message immediately.
Francais: http://www.fundserv.com/fr/company/disclaimerhttp://www.fundserv.com/francais/legal/disclaimer_email_ib.shtml
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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
This message contains information which may be confidential and privileged. Unless you are the intended addressee (or authorized to receive for the intended addressee), you may not use, copy or disclose to anyone the message or any information contained in the message. If you have received the message in error, please advise the sender by e-mail then delete the message immediately.
participants (3)
-
Adam Armstrong -
Dash Brousseau -
Nikolay Shopik