monitor jvm memory

Load: http://www.cnblogs.com/sheeva/p/6231225.html The first thing to learn about the JVM is the memory area of the JVM. The Java Virtual machine is run from the operating system memory as part of the JVM memory, and the

Transfer from: http://blog.csdn.net/mazhimazh/article/details/16879055, Dochebeau Master Sharewe know that the basic composition of the computer is: the operator, controller, memory, input and output devices, the JVM also has this set of elements, the operator is of course, the hardware CPU is also processed, just in order to adapt to "once compiled, run anywhere" situation, need to do a translation action,

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 c

The thread works, the JVM has a main memory, and each thread has its own working memory,When a thread operates on a variable, it creates a copy in its own working memory.After the operation is finished, write to main memory. When multiple threads operate the same variable at the same time, unpredictable results can occ

1. JVM Memory Model Program counter, local method stack, method area, Java stack, Java heap, and other implied registers. 1.1 Program Counter: A program counter is a small memory space that can be viewed as the line number indicator of the bytecode executed by the current thread. Basic functions such as branching, looping, jumping, exception handling, and thre

How JVM memory is setThe default Java Virtual Machine is small in size. When processing big data, Java reports an error: Java. Lang. outofmemoryerror.The JVM memory setting method. For a separate. class, you can use the following method to set the JVM

Deep understandingJavaVirtual machines:JVMAdvanced Features and best practicesRead notes (Memory principle, exception handling):1. JVM Runtime, Memory partitioning: 2. Program Counter: The JVM considers this count as the number of rows that the current thread executes for a byte code, and selects the action statement t

Reprinted from HTTPS://GITHUB.COM/PZXWHC/MINEKNOWCONTAINER/ISSUES/25Including:1. Stack Overflow (stackoverflowerror)2. Heap overflow (Outofmemoryerror:java heap space)3. Permanent generation overflow (outofmemoryerror:permgen space)4. Outofmemoryerror:unable to create native threadThe Java Virtual Machine specification specifies that the JVM's memory is divided into chunks, such as heaps, stacks, program counters, method areas, and so on, while the im

Eclipse set JVM memory inThe following error was reported when testing the conversion of a document to a picture in eclipse today: Java.lang.OutOfMemoryError:Java Heap Space As you can see from the exception above, the amount of memory that the JVM needs to use exceeds the maximum

Transferred from: http://cjjwzs.iteye.com/blog/1059381This article will be from the principle of memory paging, how to adjust the paging size two sections, to explain to you how largepage to the performance of the JVM, and at the end of the text pointed out the side effects of the large page. OK, let's get started!How memory paging size improves performanceFirst,

From the logical structure of the Java platform, we can see the JVM from the following illustration: From the above, you can see clearly the various logical modules contained in the Java platform and the difference between the JDK and the JRE. For the physical structure of the JVM itself, we can look at the following image: For the study of the JVM, it seems to