Upgraded recently from v1.9.1 to v1.9.6 of kubernetes. Everything is running fine but the kube-apiserver memory usage has hugely increased and is sitting just over 900mb as standard.
It's not a huge issue as there is available RAM for it to do so but wondered if there was a way to diagnose what might cause this RAM increase. The boxes havent changed i.e. there is the same amount of free RAM as there always was available, but kube-apiserver is being a lot more greedy with it
Referring to changelogs, they expand the functionality of custom api-server:
Therefore, that may cause increasing of ram usage.