topic Re: High CPU Usage in Panorama V5.0.4 in General Topics

High CPU Usage in Panorama V5.0.4

djr — Fri, 17 May 2013 10:23:50 GMT

Hi I am seeing the process pan_summary_gen clocking up 80-100% CPU at regular intervals for a few minutes at a time. Is this a known or should I report it?

Re: High CPU Usage in Panorama V5.0.4

gwesson — Fri, 17 May 2013 17:07:11 GMT

The pan_summary_gen process will spike the CPU at regular intervals while it creates the summary reports for the ACC. This is expected, and will not cause any interruption in function. The spikes should be fairly brief. You can run a top-like command to monitor it for a while if you like:

> show system resources follow

Hitting 'q' will get you out of that command.

Hope this helps,

Greg Wesson

Re: High CPU Usage in Panorama V5.0.4

djr — Mon, 20 May 2013 07:40:51 GMT

Thanks, I have been monitoring it with "top" and with the Vsphere client but what I have seen is since adding an NFS partition the spikes have shot up from 10 to 15% of the CPU to 65% or more.

Re: High CPU Usage in Panorama V5.0.4

gwesson — Mon, 20 May 2013 17:03:27 GMT

That is something I wouldn't expect. If you only added the NFS partition and no other changes, unless that NFS is highly latent where we are spending cycles waiting on read/write operations, I would expect the CPU to be the same as before. You may want to get a support case opened to double check.

Greg Wesson

Re: High CPU Usage in Panorama V5.0.4

djr — Tue, 21 May 2013 13:04:16 GMT

OK Thanks, I'll see what they say

Re: High CPU Usage in Panorama V5.0.4

Anon1 — Tue, 21 May 2013 16:55:01 GMT

Hi,

change NFS from UDP to TCP.

Re: High CPU Usage in Panorama V5.0.4

ericgearhart — Tue, 21 May 2013 18:38:07 GMT

Did you have this issue and flipping NFS over from UDP to TCP solved it?

Re: High CPU Usage in Panorama V5.0.4

Anon1 — Tue, 21 May 2013 19:37:00 GMT

With NFS via UDP we had poor performance (high %wa in "show system resources"). With NFS via TCP this is gone and NFS storage performance is better.

Re: High CPU Usage in Panorama V5.0.4

djr — Wed, 22 May 2013 07:24:42 GMT

I am already using TCP but thanks for the suggestion.