CPU is high when upgrade mongodb from 4.2.x to 5.0.x in kubernetes

Ops and Admin Installation & Upgrades
1

Hi,

We have upgraded mongodb from 4.2.x to 5.0.x in kubernetes. We are using statefulset. However, we see that CPU is high even no one is using application.

CPU of 4.2.15: 25m (m for millicores)
CPU of 5.0.8: 500m - 900m

So it is already more than 20 - 30 times CPU for only 1 replica.

Any clue in determining the cause of this issue would be very much appreciated.

Thank you!