java memory profiler

2.1 Run-Time data regionsThe Java Virtual machine divides the memory it manages into several different data regions during the execution of a Java program. These zones have their own purpose, as well as the creation and destruction of time, and some regions exist as the virtual machine process starts, and some regions depend on the user thread's start and end to

Program counter: A line number indicator that can be viewed as the byte code executed by the current thread, and in the conceptual model of the virtual machine, the bytecode interpreter works by changing the value of the counter to select the next byte code instruction to execute. Because JVM multithreading is implemented through the way that threads switch and allocate processor execution time, at any one time, a processor executes only the instructions in one thread. In order for the thread to

Overview of Java Garbage collection Java GC (Garbage Collection, garbage collection, garbage collector) mechanism, is one of the main differences between Java and C++/C, as Java developers, generally do not need to write memory and garbage cleaning code,

Heap and non-heap (non-heap) memoryAccording to the official statement, "Java virtual machines have a heap, the heap is a runtime data region, and all class instances and arrays of memory are allocated from here." The heap is created when the Java virtual machine is started. "" The memory outside the heap in the JVM is

This article introduces a summary of memory areas and various memory overflow scenarios in Java virtual machines.Data regionMethod area, heap, virtual machine stack, program counter, local method stackMethod areaUsed to store class information, constants, static variables, and immediate compiler-compiled code that have been loaded by the virtual machineRun a cons

Recently, I suffered from virtual memory and received reports saying that our products will be restarted from time to time, and the report said that "the memory used exceeds 5 GB ". Restarting is the mechanism of our product. We will monitor the memory, perform GC and restart the application beyond a certain limit, but it is too exaggerated to exceed 5 GB, the

JVM memory structures such as The Java heap, which is the largest piece of memory managed by a Java virtual machine. The Java heap is a piece of memory that is shared by all threads and created when the virtual machine is

one, written in front of the words Keyword volatile can be said to be the Java Virtual Machine provides the most lightweight synchronization mechanism, but it is not easy to be completely correct and complete understanding, so many programmers are accustomed to not to use it, encountered in the need to deal with multi-threaded data competition problems when the general use of synchronized to synchronize. Understanding the semantics of volatile variabl

Stack memoryThe stack memory stores a variable of the base type (int a = 3;) and a variable of the reference type (car car). When a variable is defined in a block of code, Java allocates memory space for the variable in the stack, and when the scope of the variable is exceeded, Java automatically frees the

automatically monitor C/C ++ programs, memory Corruption, memory leakage, pointer errors, and I/O errors are detected. By using a series of unique technologies (such as SCI technology and mutation testing), we thoroughly inspect and test our code, precisely locate the correct location of errors, and provide detailed diagnostic information. Can be used as a plug-in for Microsoft Visual C ++. 16. compuware

Java thread working memory and main memory variable exchange process and volatile keyword understanding1. The Java memory model specifies that in multi-threaded situations, threads manipulate main memory variables and require copi

Deep Java core Java memory allocation principle explainingIntroduction: Stack, heap, Chang, although the same is the Java memory allocation operation area, but its scope of application and function is very different. This article will delve into the

One: ConceptThe Java programming language divides memory into two types, called stack memory, which is called heap memory.The Java heap is a run-time data area in which the objects of the class allocate space. These objects are created with the new directive, and they do not require program code to be explicitly releas