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MVP
Posts: 1,111
Registered: ‎10-11-2011

Clearpass appliance - CPU spikes consistently

I have a Clearpass hardware appliance that's consistently (CPU) spiking every 5 minutes.  This is a system that is not in production and only in test, so I'm at a loss to explain the spike.  It'll go from ~3% to 20%, then drop right back down.  Is there a process that kicks off every 5 minutes that would explain this?  I have checked under System Monitor > Process Monitor, and none of the processes in the drop down are spiking.

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MVP
Posts: 4,309
Registered: ‎07-20-2011

Re: Clearpass appliance - CPU spikes consistently

What version are you running ? We had a similar issue with 6.0.x version
Thank you

Victor Fabian
Lead Mobility Engineer @ Integration Partners
AMFX | ACMX | ACDX | ACCX | CWAP | CWDP | CWNA
MVP
Posts: 1,111
Registered: ‎10-11-2011

Re: Clearpass appliance - CPU spikes consistently

6.0.2

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MVP
Posts: 1,111
Registered: ‎10-11-2011

Re: Clearpass appliance - CPU spikes consistently

[ Edited ]

Upon further examination, I see that all of my CPPM servers, including VMs, are spiking consistently.  Surely this is meant to happen...

 

I've opened a ticket with support just to be sure this isn't a bug and is expected behavior.

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MVP
Posts: 4,309
Registered: ‎07-20-2011

Re: Clearpass appliance - CPU spikes consistently

 

 

You shouldn't see that type of behavior specially if you have this appliance in test environment , not a lot of traffic  pointed to it ?

 

 

Thank you

Victor Fabian
Lead Mobility Engineer @ Integration Partners
AMFX | ACMX | ACDX | ACCX | CWAP | CWDP | CWNA
MVP
Posts: 1,111
Registered: ‎10-11-2011

Re: Clearpass appliance - CPU spikes consistently

None of the CPPM servers are performing authentication yet.  I have several DHCP helpers pointed to them for profiling purposes, but that's about the extent of the traffic.

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MVP
Posts: 4,309
Registered: ‎07-20-2011

Re: Clearpass appliance - CPU spikes consistently

 

You should probably open TAC case to get determine the root cause .

 

Have you checked if there's any outstanding patches that need to be installed under Administration » Agents and Software Updates » Software Updates

Thank you

Victor Fabian
Lead Mobility Engineer @ Integration Partners
AMFX | ACMX | ACDX | ACCX | CWAP | CWDP | CWNA
Guru Elite
Posts: 21,561
Registered: ‎03-29-2007

Re: Clearpass appliance - CPU spikes consistently


thecompnerd wrote:

I have a Clearpass hardware appliance that's consistently (CPU) spiking every 5 minutes.  This is a system that is not in production and only in test, so I'm at a loss to explain the spike.  It'll go from ~3% to 20%, then drop right back down.  Is there a process that kicks off every 5 minutes that would explain this?  I have checked under System Monitor > Process Monitor, and none of the processes in the drop down are spiking.


Compnerd,

 

If it is just 20% for a few moments, it should not be an issue.  Do you have any performance problems with the unit?

 



Colin Joseph
Aruba Customer Engineering

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MVP
Posts: 1,111
Registered: ‎10-11-2011

Re: Clearpass appliance - CPU spikes consistently

[ Edited ]

Yeah, that's what I figured.  I spoke with TAC and they confirmed that they see the same spikes in their lab equipment when devices are not authenticating against CPPM.

 

No performance problems necessarily, but while I had ACE on site they noticed that average radius response times from our controllers to our clearpass servers is around 105ms, which is quite a bit longer than the 5ms average of our Win NPS servers.  He thought this was something that I should keep an eye on to make sure there aren't any authentication timeouts.  I thought maybe occasional spikes CPU usage would explain it, but the usage on my servers appears to be normal.

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Super Contributor II
Posts: 397
Registered: ‎09-05-2012

Re: Clearpass appliance - CPU spikes consistently

Out of curiousity what does your RAM usage look like?

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