Ram allocated to the guest vm gets ballooned out (increased) in times the os needs it and then it is set to “drive. 动态规划 (dynamic programming， 简称dp)是运筹学的一个分支，它是 解决多阶段决策过程最优化的一种数学方法。 把多阶段问题变换为一系列相互联系的的单阶段问题，然后逐个加以解决。
Milo Ventimiglia and Alexis Bledel during WB Television Network 2003
The Real Gilmore Girls Story Are Alexis Bledel and Milo Ventimiglia
