Compute used by POD is called POD Overhead
Consider POD contain two containers
First - 1vCPU / 1Gib
Second - 2vCPU / 2Gib

total usage from containers
3vCPU/3Gib

Consider compute used by POD itself is 100MB

total GB used will be 3.1GB

This is consider by scheduler also

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We can control how much we can use for POD overhead