KPI degraded due to UMP overload alarm

Dear Experts.

I’m getting UMP overload alarm and during same time all the kpi’s are degraded.
What are the reasons of UMP overload alarm?
Vendor is Samsung.

Check the CPU load.

Cpu load is high.
During busy hours going upto 95%.

Does site has 3G and 4G?

Site is 4G only.