java memory analyzer

Memory analyzer (MAT)-Java memory dump analysis tool The eclipse memory analyzer is a fast and feature-richJava heap AnalyzerThat helps you find memory leaks and reduce

One, install Eclipse Memory AnalyzerFind the address of the update site at Memory Analyzer's website:Then: In the Eclipse interface--->help--->install New software--->add--->add reposity, and in location enter: Update Site address, you can install.Two, raw piles dump fileThis generates a heap dump file using the Jmap command.Ctrl+alt+delete open Windows Task Manager, click: Process---> Find the PID of the c

, for example: The application may be in the calculation of the size of the array, there is an algorithm error, resulting in a large array size, resulting in a large array is allocated.5. OOM for small swap=> example: Exception in Thread "main": Java.lang.OutOfMemoryError:request AnalysisThis type of error is thrown due to a failure to allocate memory from the native heap, and the heap memory may be nearly

Reprint Address: http://www.ibm.com/developerworks/cn/opensource/os-cn-ecl-ma/index.htmlEclipse Memory Analyzer (MAT) is one of 33 components of the famous Eclipse Galileo version of the cross-platform integrated development environment, which is a feature-rich JAVA heap dump file analysis tool that can help you to discover and reduce

Preface In using memory analyzer tool (MAT) to analyze memory leaks (I), I introduced the causes and consequences of memory leaks. This article describes how mat analyzes the root cause of Leakage Based on heap dump. Because the test examples may be too simple and it is easy to find out the problem, I look forward to t

Preface In using Memory Analyzer tool (MAT) to analyze Memory leaks (I), I introduced the causes and consequences of Memory leaks. This article describes how MAT analyzes the root cause of Leakage Based on heap dump. Because the test examples may be too simple and it is easy to find out the problem, I look forward to t

Ext.: http://tivan.iteye.com/blog/1487855ObjectiveIn the usual development, testing process, or even production environment, sometimes encountered Outofmemoryerror,java heap overflow, which indicates that the program has serious problems. We need to find the cause of outofmemoryerror. There are generally two situations:1, memory leaks, the object is dead, can not be automatically recycled through the garbag

Original: http://tivan.iteye.com/blog/1487855ObjectiveIn the usual development, testing process, or even production environment, sometimes encountered Outofmemoryerror,java heap overflow, which indicates that the program has serious problems. We need to find the cause of outofmemoryerror. There are generally two situations:1, memory leaks, the object is dead, can not be automatically recycled through the ga

ObjectiveIn the usual development, testing process, or even production environment, sometimes encountered Outofmemoryerror,java heap overflow, which indicates that the program has serious problems. We need to find the cause of outofmemoryerror. There are generally two situations:1, memory leaks, the object is dead, can not be automatically recycled through the garbage collector, by finding out the location

1 How to troubleshoot memory leaksDalvik Debug Monitor Server (DDMS) is a ADT part of the plug-in, where two features are available for memory checking :· Heap View the allocation of heaps· Allocation tracker tracking Memory AllocationsDDMS These two features help to find the operational behavior of a memory leak. E

, the retained size is the sum of the memory that the object can be recycled to after it has been GC. For a better understanding of retained size, consider an example.The objects in memory are treated as nodes in, and objects and objects are referenced to each other. Here's a special node GC Roots, Positive solution! This is the beginning of reference chain.Starting with obj1, the middle blue node represent

Original: http://seanhe.iteye.com/blog/898277, preparatory workAnalysis of larger dump files (according to my own experience 2G above the dump file will need to use the method described below, otherwise the mat will appear oom) need to adjust the virtual machine parameters Find a 64-bit system in Memoryanalyzer.ini setup-xmx2g If the 32-bit XP can be attempted using the following method: Installing the JDK for JRockit 6.0 Mat uses JRockit's JDK to launch

Memory analysis tool for Android (memory analyzer tool) If ddms does discover Memory leakage in our program, how can we locate the specific problematic code snippet and find the problem? If you analyze the code logic from start to end, it will drive people crazy, especially when maintaining the code written by others.

Error opening heap dump 'com. ZTE. Mobile. Sync. hprof'. Check the error log for further details.Error opening heap dump 'com. ZTE. Mobile. Sync. hprof'. Check the error log for further details.Unknown hprof version (Java profile 1.0.3) (Java. Io. ioexception)Unknown hprof version (Java profile 1.0.3) ThehprofFile you get from Android has Android specific for

Using Eclipse Memory Analyzer for heap dump file analysisEclipse Memory Analyzer (MAT) is one of 33 components of the famous Eclipse Galileo version of the cross-platform integrated development environment, which is a feature-rich JAVA heap dump file analysis tool that can h

which the object can be accessed directly or indirectly to the object. In other words, the retained size is the sum of the memory that the object can be recycled to after it has been GC. For a better understanding of retained size, consider an example.The objects in memory are treated as nodes in, and objects and objects are referenced to each other. Here's a special node GC Roots, Positive solution! This

Recently, the online production system suddenly frequent the JVM memory alarm! But the system has not been changed in the near future!In order to identify the cause of the memory alarm, the JVM Dump file was analyzed using the Eclipse memory Analyzer tool (MAT)!1. Generate Dump FileProduction of dump files with JmapJma

Eclipse Memory Analyzer (MAT) is one of 33 components of the famous Eclipse Galileo version of the cross-platform integrated development environment, which is a feature-rich JAVA heap dump file analysis tool that can help you to discover and reduce memory vulnerabilities. This article mainly describes how to install co

OverviewFor large JAVA applications, fine testing is also hard to block all vulnerabilities, even though we have done a lot of good work during the testing phase, many problems are exposed in the production environment and are difficult to reproduce in a test environment. The JVM is able to record some of the operational state of the system when the problem occurs and store it in a heap dump file, providing an important basis for us to analyze and dia

that there is no problem. One is started with the root user, and one is started with a tomcat user. A daemon process, an application process.Solution Two:Troubleshoot problems with the server and start thinking about the program head-on.Re-issue the item with the problematic version, dump down the log, and then quickly roll back the observation. The dump log for a single machine has 5 G:Through Memory analyzer