High CPU Usage in Panorama V5.0.4

[djr]

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?

[gwesson]

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

[djr]

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.

[gwesson]

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

[djr]

OK Thanks, I'll see what they say

[Anon1]

Hi,

change NFS from UDP to TCP.

[ericgearhart]

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

[Anon1]

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.

[djr]

I am already using TCP but thanks for the suggestion.