Java Memory Area && OOM VM运行时数据区域: 1.程序计数器(Program Counter Register) 每一个Java线程都有一个程序计数器来用于保存程序执行到当前方法的哪一个指令,对于非Native方法,这个区域记录的是正在执行的VM原语的地址,如果正在执行的是Natvie方法,这个区域则为空(undefined)。此内存区域是唯一一个在VM Spec...
Internedjava.lang.Stringobjects are also stored in the permanent generation. Thejava.lang.Stringclass maintains a pool of strings. When the intern method is invoked, the method checks the pool to see if an equivalent string is present. If so, it’s returned by the intern method; if not, ...
voidenter(java.lang.Runnable logic) Associate this memory area with the current schedulable object for the duration of the execution of therun()method of the givenRunnable. voidexecuteInArea(java.lang.Runnable logic) Execute the run method from thelogicparameter using this memory area as the curr...
As you can see, this area is not big enough to store objects so what is happening is primitive types and object pointers can be stored directly instead of storing a whole object. 正如你所看到的,这个区域不够大,无法存储对象,因此可以直接存储原始类型和对象指针,而不是存储整个对象。 1_MyD7U4_...
说到这里,对常量池中的字符串值的存储位置应该有一个比较明了的理解了。在程序执行的时候,常量池会储存在Method Area,而不是堆中。常量池中保存着很多String对象; 并且可以被共享使用,因此它提高了效率 二、从根本上认识java.lang.string类与string池
Method Area is part of space in the Perm Gen and used to store class structure (runtime constants and static variables) and code for methods and constructors. Java Memory Model – Memory Pool Memory Pools are created by JVM memory managers to create a pool of immutable objects, if implement...
In stack, instantiated fieds are added to memory one on another just like its name stacking. 在堆栈中,实例化的文件一个接一个地添加到内存中,就像堆栈的名字一样。 As you can see, this area is not big enough to store objects so what is happening is primitive types and object pointers can ...
In this tutorial, we saw how the JVM lays out objects and arrays in the heap. For a more detailed exploration, it’s highly recommended to check out theoops section of the JVMsource code. Also,Aleksey Shipilëvhas a much morein-depth articlein this area. ...
Section Size [MB] Area Total [mb] 168.7 All Others [mb] 3.1 Other dev + Unknown Code [mb] 28 mmaps Stack [mb] 0.1 Stack Graphics [mb] 88.7 Gfxdev + EGL mtrack + GL mtrack Native [mb] 40.8 Native Heap Java [mb] 8 Dalvik Heap Plugins Usually, most of the memory goes into the...
Memory used by chunks in the arena chunk pool Shared space for classes Memory mapped to class data sharing archive Thread Memory used by threads, including thread data structure, resource area and handle area and so on. Thread stack Thread stack. It is marked as committed memory, but it migh...