[j-nsp] EX4200 Junos 12.3R3.4 Processor Utilization

[David Miller]

On 9/21/2013 7:38 AM, Serge Vautour wrote:
> We hit an SNMP memory leak bug on 12.3R3 which drove up the CPU & Mem.
> Might be something similar. 12.3R4 is out. Maybe give it a try?
> 

Thanks for the thought, but 12.3R4.6 displays the same behavior for me -
spiking the procs and log spam on a simple show command.

-DMM


> 
> ------------------------------------------------------------------------
> *From:* David Miller <dmiller at tiggee.com>
> *To:* juniper-nsp at puck.nether.net
> *Sent:* Friday, September 20, 2013 5:59:35 PM
> *Subject:* [j-nsp] EX4200 Junos 12.3R3.4 Processor Utilization
> 
> 
> Anyone running the JTAC recommended version of Junos (12.3R3.4) on any
> EX4200s and collecting configs with RANCID?  If so, then I would be
> curious to see what your proc utilization looks like.
> 
> What I see on my 12.3R3.4 switch is a large CPU spike whenever RANCID
> collects data.
> 
> The command that seems to be the issue is:
> show version detail | no-more
> 
> On my switch the following 3 log messages appear in /var/log/messages
> every time 'show version detail' is run:
> 
> Jun 14 03:19:39  mgd[2139]: UI_OPEN_TIMEOUT: Timeout connecting to peer
> 'remote-operations'
> Jun 14 03:19:39  mgd[2139]: UI_OPEN_TIMEOUT: Timeout connecting to peer
> 'dhcp'
> Jun 14 03:19:40  mgd[2139]: UI_OPEN_TIMEOUT: Timeout connecting to peer
> 'autoinstallation'
> 
> Top shows:
> CPU states: 39.2% user,  0.0% nice, 55.3% system,  0.1% interrupt,  5.5%
> idle
> during a run of this show command.
> 
> My SNMP monitoring over time shows spikes of:
> jnxOperatingCPU.FPC0  max: 81.80
> jnxOperatingCPU.RE0  max: 35.92
> 
> Anyone else seeing this as well?
> 
> I can reproduce this behavior exactly on a brand new switch, upgraded to
> 12.3R3.4, with vanilla default Juniper config on it (so I don't think
> that it is my config).
> 
> Am I missing some simple config option?
> set chassis routing-engine dont-blow-out-cpus-on-simple-show-cmds
> 
> - DMM
> 
> 
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-- 
-______________________
David Miller
dmiller at tiggee.com

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