You can choose from multiple threading models and different methods of synchronization within the model, but this varies from JVM to JVM. What is the purpose and role of Heap memory in Java is everyone's question from performance testing. This is the measure of how much memory space is actually being used. Setting New heap size ratios -XX:SurvivorRatio The New generation area is divided into three sub-areas: Eden, and two survivor spaces that are equal in size. In these graphs, you can see that this application is spending a higher percentage of time running young collections top and that garbage collection processes are freeing a constant amount of memory over time bottom.
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