What does "idle" mean? Both a Linux or Windows OS not running any active software will still do computation and even network traffic (disk cache wrangling, indexing, checking for updates, NTP clock syncing etc), and requires electricity to do so.
It's very low cost, especially if its on a VM from a host that otherwise runs other VMs, but it's not 0. And if it happens to be the last VM preventing a hardware server from completely powering off, then it's actually quite far from 0.
What does "idle" mean? Both a Linux or Windows OS not running any active software will still do computation and even network traffic (disk cache wrangling, indexing, checking for updates, NTP clock syncing etc), and requires electricity to do so.
It's very low cost, especially if its on a VM from a host that otherwise runs other VMs, but it's not 0. And if it happens to be the last VM preventing a hardware server from completely powering off, then it's actually quite far from 0.