free java memory profiler

when the depth of the request stack is greater than the maximum allowable depth of the Java Virtual machine, and if the Java Virtual machine does not request enough space when the stack is extended, outofmemoryerror:unable to create New native Thread.Strackoverflowerror: The amount of memory in a single thread exceeds the size of the stack-XSSScene appearsA loca

　　There are 4 ways to describe memory allocation and recycling, namely how memory is allocated , what memory needs to be recycled , under What circumstances , and how to monitor and optimize the GC mechanism .Java GC (garbage collction) garbage collection mechanism is one of the main differences between

]; System.arraycopy (elements, 0, NewArray, 0, size); public static void Main (string[] args) {Mystack stack = new Mystack (100); for (int i = 0; i This program is available to support commonly used stack and stack operations. However, there is one problem that has not been handled well, that is, when the stack is out of operation, there is no reference to the stack element in the array, which causes the program to keep a reference to the object (this object is referenced by an arr

One of the best known advantages of Java technology is that, unlike other languages such as C programmers, Java programmers do not have to be responsible for daunting memory allocations and releases. The Java runtime can manage these tasks for you. Each instantiated object automatically allocates

I read a really, really interesting article on memory management for the Erlang VM. It is written as a thesis by Jesper Wilhelmsson I thought it might is nice to discuss the differences between Erlang ' s memory setup and Oracle ' Java VM. As a real short introduction for those who have never heard of Erlang; It is a functional language this uses asynchronous m

Java Memory allocation:1. RegistersWe have no control over the program.2. StackStores the basic types of variable data, local variables, and references to objects, but the objects themselves are not stored in the stack, but are stored in the heap (new objects) or in a constant pool (string constant objects are stored in a constant pool. ）3. HeapHolds an array of objects created with new.To use the garbage c

The collection algorithm is the method of memory recycle, and the garbage collector is the concrete implementation of memory recycle. Automatic memory management solves: allocating memory to objects and reclaiming memory allocated to objects Why should we learn to l

1. Preface memory allocation and recovery policy Structure analysis of JVM heap (new generation, old age, permanent generation) Object Precedence in Eden Assignment Large objects go straight into the old age Long-lived objects will enter the old age. Dynamic Object Age Determination Space Allocation guarantee 2. Garbage collector and memory alloca

First, IntroductionIn the Java technology system mentioned in the final analysis of memory automation management is the allocation and recovery of memory two problems, before and we have talked about the knowledge of Java recycling, today to talk about the Java object in

question: Java.lang.OutOfMemoryError:Java Heap space-> heap memory overflowJava.lang.OutOfMemoryError:PermGen Space-> Non-heap memory (persistent save area) overflow Description: Heap (HEAP) and non-heap (non-heap) memory According to the official statement: "Java virtual machines have a heap, the heap is the Run-time

. Outofmerroyerror error; Object Memory allocation method Pointer collisions (bump the pointer)---parnew, Serial Free list---CMS (mark-sweep) Decision conditions Whether the garbage collector is ==>java-heap with compressed finishing M