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Forum Discussion

SanYang's avatar
SanYang
Icon for Cirrostratus rankCirrostratus
Sep 14, 2023

High CPU utilization for only cpu 0

Hello, I have 26 CPUs in multi thread format but only CPU 0 utilization goes 100 and other CPUs utilization remains under 30%. # tmsh show /sys tmm-info -------------------------- Sys::TMM: 0.0 ...
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SanYang's avatar
SanYang
Icon for Cirrostratus rankCirrostratus
Sep 17, 2023

Hi Mohamed_Ahmed_Kansoh ,

Thanks for your reply.

I checked the charts.
CPU0 has been running at 100% for a while now...

 

 

Mohamed_Ahmed_Kansoh's avatar
Mohamed_Ahmed_Kansoh
Icon for MVP rankMVP
Sep 18, 2023

Hello SanYang, 

yes this does make sense with the TMM0 CPU value in CLI. 

But as I see in the historical graphs last monday and tuesday it was normal. 

I see now you need to open a case with F5 support , to validate the health of TMM0. 
maybe this is the reason : https://my.f5.com/manage/s/article/K02895424

but you need to verify this , because if one of your TMMs crashes ( data plane ones I mean ) this will effect badly in your overall performance. 

So I recommend opening a case. 

then when you get the RCA for this high utilization you can share it with us.