java memory profiler eclipse

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

value and-xx:maxpermsize must be greater than 25.6M ===================================Ultimately, it depends on the exact configuration of your machine.Please refer to the following article in the configuration barThere is a Eclipse.ini file under the Eclipse folderxms128m-xmx512m-xx:permsize=64m-xx:maxpermsize=128m Here are a few questions: 1. What are the meanings of each parameter? 2. Why do some machines I set-xmx and-xx:maxpermsize to 512M afte

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.

1. Install Eclipse Memory Analyze Tool (Eclipse MAT)Eclipse Help---Install New software ...--and finish restarts on the linePs:mat new version of the link in this http://www.eclipse.org/mat/downloads.php (location is filled with the update Site)2. Use the mat to run the Java

startupNote: This parameter must be placed on the last side of all parameter variablessuch as-vmargs-xms40m-xmx256m-xx:permsize=64m-xx:maxpermsize=128mHeap 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

problem in a large software system. I have also written down the failure practices, because they are of reference value:Symptom: The program runs normally after it is started. However, after a module is started, 1 MB of memory is consumed every minute, which continues to grow to Java. lang. outofmemoryerror, And the CPU usage also gradually increases to 100%.Judgment: due to problems in both the CPU and

of actual physical memory here is a point, If your memory is 1024MB, but the actual system used is not likely to be 1024MB, because a part of the hardware is occupied. 3. Why is the above parameter written to the Eclipse.ini file eclipse does not perform the corresponding settings?Why is the same argument valid on a shortcut or command line and is not valid in

, 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

After we install eclipse, we have a file named Eclipse.ini in our installation directory.The contents of the open file are as follows: -startupplugins /org.eclipse.equinox.launcher_1.3.100.v20150511-1540. jar--launcher . libraryplugins /org.eclipse.equinox.launcher.win32.win32.x86_64_1.1.300. V20150602-1417-productorg . Eclipse.epp.package.jee. product--launcher . defaultactionopenfile--launcher . xxmaxpermsize256m-showsplashorg .

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

In ubuntu, the eclipse configuration file is: VI ~ /Eclipse/eclipse. ini -Vmargs-xms128m-xmx512m-XX: permsize = 64 m-XX: maxpermsize = 128 m There are several questions:1. What are the meanings of each parameter?2. Why does one machine set-xmx and-XX: maxpermsize to MB before eclipse can be started, and some machines c

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

-Vmargs-xms128m-xmx512m-XX: permsize = 64 m-XX: maxpermsize = 128 mThere are several questions:1. What are the meanings of each parameter?2. Why can eclipse be started after I set-xmx and-XX: maxpermsize to 512m on some machines, but some machines cannot be started?3. Why didn't eclipse execute the corresponding settings when writing the above parameters to the eclipse