The role of heap memory: objects generated during the operation of the object program will be stored in the heap memory.
What is contained in heap memory: young generation, old generation
The new generation includes: Eden (Eden), From Survivor, To Survivor area.
Ratio: Cenozoic: Old age 1:2, the respective ratios of Eden, From Survivor, To Survivor in the Cenozoic: 8:1:1
Each time the JVM uses Eden and one of the Survivors to store objects. That is, From Survivor and To Survivor will only use one at a time, and there will always be one free.
