What is the process of ⼀ objects from loading into JVM to being cleared by GC?

• Object application space
• Judge Eden Whether the area has allocable object space , If Eden Area assignable , Allocate space directly
• If space is insufficient, proceed YGC, in the light of YGC Objects that survive ,YGC The operation details are as follows ：
  • Judge Survivor Whether the area can allocate space , Distributable , From from To to District （S0/S1 Switch back and forth ）, threshold + 1
  • Survivor Zone is not assignable , Then directly promoted to the elderly generation
  • Judge Survivor Whether the threshold of the zone object is greater than 15, If it is larger than, it will be promoted to the elderly , Otherwise, from from To to District , threshold + 1
• YGC Then judge Eden Whether the area has allocable object space , If yes, allocate space directly , Otherwise, judge whether the elderly area can allocate space
• Elderly areas can be allocated , Then the application object space , If not, proceed FGC
• Then judge whether the elderly area can be allocated , Distributable , Then the application object space , If it cannot be allocated, an error will be reported OOM(Out Of Memory)