[feature request] supports memory qos strategy

[zwzhang0107]

What would you like to be added:

Why is this needed:

[zwzhang0107]

/assign jasonliu747

[zwzhang0107]

/area koordlet
/area koord-manager

[saintube]

i'd like to help with this

[jasonliu747]

i'd like to help with this

awesome, thanks for your help.
/assign @saintube