[f-nsp] FCX High CPU Diagnostics

[Derek Maxwell]

What’s interesting is we weren’t using SNMP on this box at all. However, disabling it seemed to have an immediate impact.

We’ll see if it comes back and that was just a coincidence. That box is being replaced by a XMR either tonight or this weekend anyway. Hopefully the XMR is robust and problem free.

I appreciate everyone’s help and guidance. It’s great having some support from the community.

From: Markus Monka <mmonka at netzquadrat.de>
Date: Thursday, April 4, 2019 at 4:40 AM
To: Derek Maxwell <derek.maxwell at chosentechgroup.com>
Cc: Jörg Kost <jk at ip-clear.de>, foundry-nsp <foundry-nsp at puck.nether.net>
Subject: Re: [f-nsp] FCX High CPU Diagnostics

Hi,

we had the same problem with CER 2024. Querying BGP Stats via SNMP is quite heavy for the box.

Best Regards
 Markus

On Wed, Apr 3, 2019 at 10:55 PM Derek Maxwell <derek.maxwell at chosentechgroup.com<mailto:derek.maxwell at chosentechgroup.com>> wrote:
That may have actually done the trick. We aren't using any snmp tools on this box, but I added no snmp-server to the config and that brought cpu back down to 1%. I'll keep watching and see where it lands.

If there are any other thoughts, feel free to send them over. I appreciate any input.

-----Original Message-----
From: Jörg Kost <jk at ip-clear.de<mailto:jk at ip-clear.de>>
Sent: Wednesday, April 3, 2019 1:12 PM
To: Derek Maxwell <derek.maxwell at chosentechgroup.com<mailto:derek.maxwell at chosentechgroup.com>>
Cc: foundry-nsp <foundry-nsp at puck.nether.net<mailto:foundry-nsp at puck.nether.net>>
Subject: Re: [f-nsp] FCX High CPU Diagnostics

Can you eliminate any SNMP tool, that might spin the CPU around?

On 3 Apr 2019, at 21:49, Derek Maxwell wrote:

> Output of dm cpu:
>
> idle pid 0 id 536918812 cpu 0 usage                    0
> main pid 1 id 536918812 cpu 0 usage                    0
> flash pid 0 id 536918812 cpu 0 usage                    0
> arrays at 2238d894 and 2238dd6c
> from entry 78 to entry 35
> loop cnt: 3395 3626 -> 231
> read cnt: 57670 61592 -> 3922
> loop rate = 231/430 = 0
> rcode = 100 - (100*0/2550) = 100
> 99/100 busy, from 43 sec ago
>
> sho ip bgp sum does not show any FIB programming
>
> We have fewer than 10 routes in so we're definitely not exceeding any
> limits.
>
> We have icmp redirects disabled
>
>
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