memory overcommitment 内存过量使用 ; 内存没有过量配置
Memory overcommitment can increase the demand for all other system resources.
内存超量使用可能增加所有其他系统资源的需求。
As demonstrated, an overcommitment policy can help in some situations and cause harm in others.
如以上演示，超量使用策略在某些情况下有用，某些情况下却可能造成不利影响。
Linux provides additional mechanisms to address memory overcommitment specific to virtualization.
Linux提供了额外的机制用来解决由虚拟化引起的内存超量使用。
应用推荐