Eclipse Mat Heap Dump Analysis

With memory analyzer one can easily find the biggest objects as mat provides reasonable accumulated size retained size explore the object graph both inbound and outbound references. Mat is much easier to use and read than stand along jhat unix command and while monitor memory usage using visualvm is helpful mat gives you specific hints about which classes may be the suspects. Use the memory analyzer to analyze productive heap dumps with hundreds of millions of objects quickly calculate the retained sizes of objects see who is preventing the garbage collector from collecting objects run a report to automatically extract leak.

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Eclipse mat heap dump analysis. A heap dump is a snapshot of the heap memory of a java process at a given time. Select the option leak suspects report and click finish. The dump analysis will be presented to you as shown in the next page. This helps the developer to find memory leaks and high memory consumption issues.

In this post i recommend eclipse memory analyzer mat for developers to analyze heap dumps so you can chase down leak suspects. The eclipse memory analyzer is a fast and feature rich java heap analyzer that helps you find memory leaks and reduce memory consumption. Let s see how to load the jvm dump file in eclipse s memory analyzer plugin. The heap dump file is usually stored with hprof extension.

Open the heap dump in eclipse memory analyzer using the option file open heap dump. Eclipse memory analyzer tool mat is by far the best tool to analyze java heap dumps. The best method to analyze a phd heap dump is to use the eclipse memory analyzer tool mat or the ibm memory analyzer tool. These tools process the dump file and provide a visual representation of the objects in the java heap.

The eclipse memory analyzer tool mat is a fast and feature rich heap dump analyzer that helps you find memory leaks and analyze high memory consumption issues. The user can create it or skip it. Heap dump analysis using eclipse memory analyzer tool mat a heap dump is a snapshot of all the java objects that exist in the heap space. The eclipse memory analyser tooling mat is a set of plug ins for the eclipse ide which provides tools to analyze heap dumps from java application and to identify memory problems in the application.

Go to the file open file option in eclipse s menu bar browse to the dump file that was generated in the previous page and open it. First it will prompt you to create a leak suspect report.