adjust virtual memory

MMU Virtual Memory Management (vmmemory Management) mechanism is widely used in modern operating systems. This requires the support of MMU (Memory Management Unit) in the processor. This section briefly introduces the role of MMU. First, we introduce two concepts: Virtual Address and physical address. If the processor

The Java Virtual machine divides the memory it manages into several different data regions during the execution of a Java program. These areas have respective uses, as well as creation and destruction times, and some regions exist as virtual machine processes start, and some are built and destroyed depending on the start and end of the user thread. According to t

The analysis of Linux memory management mechanism, can not leave the above several concepts, before introducing the above concepts, first from the "deep understanding of the Linux kernel," the book to extract a few paragraphs on the above noun explanation:An explanation of the deep understanding of the Linux kernelLogical addresses (Logical address)Contains the address (a bit esoteric) used in machine language directives to specify an operand or an in

This article was reproduced from: http://blog.csdn.net/yusiguyuan/article/details/9664887The analysis of Linux memory management mechanism, can not leave the above several concepts, before introducing the above concepts, first from the "deep understanding of the Linux kernel," the book to extract a few paragraphs on the above noun explanation:An explanation of the deep understanding of the Linux kernelLogical addresses (Logical address)Contains the ad

First, the JVM memory modelAccording to the JVM specification, the JVM memory is divided into five parts: virtual machine stack, heap, method area, program counter, local method stack.1. Virtual Machine stack:Each thread has a private stack that is created as the thread is created. In the stack is a kind of "stack fram

If you had asked me what virtual memory was severalYears ago, I 'd have given you some hand-wave explanation about makingIt appear as if your computerHas much more RAM than it actually does. Which is only sort of correctAnd fairly imprecise. Sometimes people will get stuck on the ideaWriting dataTo the file system, which is not quite correct either. First,A thought experiment about a system with no

Review the knowledge of C + + today, when see the virtual base class this time, there is no too much to investigate, is to know that the virtual base class is to eliminate the class inheritance between the two semantic problem, but is very curious, how it is eliminated, how the memory layout is distributed? So I studied it in depth, and the concrete principle is

Analysis of the Linux memory management mechanism, not from the above concepts, before introducing the above several concepts, first from the "in-depth understanding of the Linux kernel," the book excerpt from a few paragraphs on the above nouns explanation: first , "deep understanding of the Linux kernel" explanation Logical addresses (Logical address) An address (somewhat esoteric) that is contained in a machine language instruction to specify an op

What is virtual memory and how does it work? The role of memory in the computer is critical, all running programs in the computer need to go through the memory to execute, if the execution of the program is very large or many, will lead to memory exhaustion. To solve this p

I. Briefly introduce the early memory implementation: (skipped) 1. In early computers, running a program was characterized: (1) All these programs will be loaded into the memory, (2) The program runs directly in the memory, that is, the memory address accessed in the program is the actual physical

Party A: When I run a 3D game in the Windows XP operating system, I suddenly see a hint that "virtual memory is not enough" in the system Tray area. How can i solve this problem that I have seen before?Party B: Virtual memory is a part of the hard disk space to act as memory

that exceeds the maximum allowable capacity of the virtual machine, the Stackoverflowerror exception is thrown (? How to view the maximum capacity of a virtual machine stack) 2) If the Java Virtual machine stack can be dynamically extended, but the attempt cannot request enough memory to create the corresponding

Java memory zone and Virtual Machine class loading mechanism I. Data Area During Java Runtime 1. Program counters The memory of "thread private" is a small memory space. It can be seen as the row number indicator of the bytecode executed by the current thread. The only region in the Java

Recently we have often talked about the topic is the DDR memory of the big price reduction, DDR266 from the position of more than 400 yuan plunged to about 200 yuan, many people have used 512MB or even 1GB of memory, so there is a view of some players in the popular, that is to disable virtual memory, Prohibit Windows

Recently we have often talked about the topic is the DDR memory of the big price reduction, DDR266 from the position of more than 400 yuan plunged to about 200 yuan, many people have used 512MB or even 1GB of memory, so there is a view of some players in the popular, that is to disable virtual memory, Prohibit Windows

It is well known that Java programs run on the Java Virtual Machine (JVM), so how is the memory allocated when the JVM is running? Each part of the program is stored in the memory of which part, and how to access, below, let me explain the Java Virtual Machine memory area.Wh

First, Introduction The various memory management policies of the operating system are for the same purpose: Multiple processes are stored in memory at the same time to allow for multi-channel program design. However, these policies require that the entire process be placed in memory before the process executes. Dynamic onboarding, while mitigating this limitatio

reason for "Low virtual memory": 1, infection virus Some viruses take up a lot of memory space when they occur, causing the system to have a memory problem. Quickly to antivirus, upgrade the virus library, and then the anti-virus measures to do a good job! 2. Improper setting of

As mentioned above, the loading mechanism of the class, which refers to the initialization of the class using a part of memory management knowledge, here let us see how the Java Virtual Machine management memory.Let's take a look at the picture first.In some articles, the thread containment zone is also known as the thread exclusive area, which is actually a meaning. Let us introduce the following five part

What is virtual deposit? Why do you need it? we know that program code and data must reside in memory to be able to run, however, the system memory is very limited, often can not accommodate a full program of all the code and data, not to mention in the multitasking system, you may need to open the subroutine, paint programs, browsers and many other tasks, wa