jvm memory leak

Chapter 2 JVM memory allocation and Chapter 2 jvm allocation Note: This blog is mainly based on the following three books: Distributed Java applications: basics and practices Deep understanding of Java Virtual Machine (version 2) 16 lessons that break the basic skills of programmers Note: For details about the JVM

In managed memory management, the "leak" meaning differs from the forgotten explicit release (delete/delete[] in traditional Native applications), and it is necessary, of course, for unmanaged resources such as handles, or in the Finalize (the destructor is equivalent to Finalize) method, which is explicitly disposed in the the "Leak" object instance in managed

does not prevent the old string from being recycled, but rather blocks the old string from the contents of the character array. Be careful when reading. JDK-4513622: (str) Keeping a substring of a field prevents GC for object mentioned in this article has a little problem with the use of non-new form, which ignores the existence of a string constant pool, specifically view the following Attention. AttentionIn the code that reproduces the problem abovestring getString () { // ret

Java memory composition:Heap and non-heap memory According to the official statement: "A Java virtual machine has a heap. The heap is the runtime data area, and the memory of all class instances and arrays is allocated from this place. The heap is created when the Java Virtual Machine is started ." "Memory outside of

This article transferred from: http://www.ibm.com/developerworks/cn/linux/l-mleak/This paper discusses the memory leak detection method and its implementation of C + + program under Linux. These include the basic principles of new and delete in C + +, the implementation principles and methods of the memory detection subsystem, and advanced topics in

parameter is localvariable,localvariable inside is a Long array.The Code (3) Places 50 tasks into the thread pool.The code (4) sets the localvariable variable for the current thread, which is to put the new localvariable variable into the threadlocals variable of the current thread.Because there is no shutdown or Shutdownnow method to call the thread pool, the user thread inside the thread pool does not exit, and the JVM process does not exit.After r

This article we share the jquery memory leak solution, for your reference, the specific contents are as follows Idea: The way to remove jquery element objects for the jquery extension greatly reduces the pressure on memory leaks ;(function ($) { if (!$.lui.widget) $.lui.widget = {};

This article introduced a simple use of Linux system Tools Valgrind to detect memory leaks by applying Valgrind to discover the memory problems of Linux programs, This paper implements a tool for detecting memory leaks, including the principle description and implementation details. the　　 both articles are from the IBM community (suggested to read the original te

VC + + IDE default state is not enabled memory leak detection mechanism, that is, even if a piece of code has a memory leak, debugging session Output window of the Debug page does not output information about memory leaks. You must set up two basic agencies to enable the

Learn JVM easily (II)-memory model, visibility, Command Re-sorting, jvm Model In the previous article, we introduced the basic running process and memory structure of JVM, and had a preliminary understanding of JVM, in this articl

* origstream = new STD: ifstream ();4. At this time, I can determine that origstream has allocated memory, but it has not been properly released. After processing it again, there will be no memory leakage. 5. In the end, remember to delete the _ crtsetbreakalloc (98500); statement. Otherwise, it will not be annoying to have a breakpoint every time .. Bytes ----------------------------------------------

Speaking of Java memory leaks, in fact, the definition is not so clear. First, if the JVM has no bugs, there is no "heap space that cannot be recycled" in theory, which means that memory leaks in C/s are not in Java. Second, if the Java program has been holding a reference to an object, but from the procedural logic, the object will never be used again, then we c

No delete,free after 1.new,malloc. 2. Create kernel objects (such as Createfile,createmutex,createthread) without releasing the kernel object handle. 3. Create a memory-mapped file, createfilemapping,mapviewoffile after CloseHandle (), UnmapViewOfFile 4. After the creation of GDI objects, such as loadicon,loadimage,createimagelist and so on, no destroy dropped 5. After the DC is created, such as GetDC (), the DC handle is not freed 6. Keep the

is a memory leak? Often hear people talk about memory leaks, but to ask what is the memory leak, few say clearly. A memory leak is a waste object (objects that are no longer in use) th

Address: http://www.iteye.com/topic/802573 There is a wall between Java and C ++ that is surrounded by the dynamic memory allocation and garbage collection technology. The people who look at it want to go in, but the people inside the wall want to come up with it. Overview: For developers engaged in C and C ++ program development, in the memory management field, they are the emperors with the highest power

Objective Memory leak simply means that you have applied for a piece of memory space and have not been released after use. Its general performance is the longer the program runs, the more memory consumed, the end of the total memory, the entire system crashes. A piece of

Deep understanding of Java Virtual Machine: JVM advanced features and best practices (in-depth analysis of JVM Based on issues such as memory management and high concurrency) Provides a comprehensive and in-depth analysis of JVM based on core content such as memory managemen

can determine that origstream has allocated memory, but it has not been properly released. After processing it again, there will be no memory leakage. 5. In the end, remember to delete the _ crtsetbreakalloc (98500); statement. Otherwise, it will not be annoying to have a breakpoint every time .. Bytes ---------------------------------------------------------------------------------------------------------

From: http://blog.csdn.net/zhangbinjn/archive/2009/08/13/4444641.aspx Today, I want to write some work-related articles and introduce the tools (leakdiag and ldgrapher ). In the past two weeks, I can say that I have not slept well. The game running after the company's Public Beta has completed a task and the memory has reached more than 1 GB. How can I play this game and how can I play it, the recharge momentum of several hundred million in a month m

A deep understanding of one jvm [memory region] and a deep understanding of the jvm Region Before the beginning of this article, we need to declare that this series of articles discuss the hot spot VM. Most of the ideas in this article are based on Zhou Zhiming, who deeply understands the Java VM: JVM advanced features