CPU usage in 'sessions widget' vs 'CPU' widget?

Forum|Forum|3 years ago
August 8, 2022
3 replies
7107 views

The firewall in question is a 40F running v6.4.9. So the sessions widget is saying:

'Current sessions: 402 CPU: 83.6% SPU: 0.0% nTurbo: 16.6%'

The CPU number seems awful high since there isn't much going on at the moment. What has me confused:

The 'CPU' widget shows CPU utilization fluctuating around 1%. I'd appreciate any tips as to the discrepancy.

FortiGate

Best answer by Anthony_E

Hello druber,

Thank you for using the Community Forum.

I will seek to get you an answer or help. We will reply to this thread with an update as soon as possible.

Regards,

Anthony_EAnswer

Staff

Hello druber,

Thank you for using the Community Forum.

I will seek to get you an answer or help. We will reply to this thread with an update as soon as possible.

Regards,

Best Regards

druberAuthor

New Member

Ah, 1000 thanks. That makes perfect sense!

Anthony_E

Staff

Hello druber,

I have found this documentation:

https://docs.fortinet.com/document/fortigate/6.2.3/cookbook/232929/troubleshooting-high-cpu-usage

Could you please tell me if it helps?

Regards,

Best Regards

FriedBacon

Visitor III

Everything you're seeing there is normal. Dont be confused on the CPU Utilization (in your case 1%) and the Session Utilization CPU. The Session CPU your seeing is there (the 83.6%) means basically that 83.6% of your total no. of sessions that is processed by FortiGate is being handeld by your FortiGate's discreet CPU. In terms of CPU utilization; just look at 1%

If i were to put it in a sentence; currently your CPU usage is 1%, and 83.6% of your sessions is being handled by that 1% (among other services/daemons)

Here's a KB for it as well: https://community.fortinet.com/t5/FortiGate/Technical-Tip-Understanding-the-meaning-of-Session-CPU/ta-p/211075

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