![]() To configure your application to produce a heap dump whenever an OutOfMemory Error is thrown, add the following vm argument: -XX:+HeapDumpOnOutOfMemoryErrorĪlternatively, you can use jstack to acquire a Heap dump from a currently running java process. However, if you use the MAT alongside other debugging tools and techniques, you can often conquer memory leaks pretty quickly. The MAT cannot tell you why an object was created, nor can it show you objects that have already been garbage collected. In all cases it’s important to keep in mind that this is a snapshot of memory at a point in time. Manually acquire a heap dump and load it into the MAT.Connect the MAT to an existing java process, or.Configure an application to dump the contents of its memory when an out of memory error occurs,.There are several ways you can get started with MAT. The application then sleeps without removing or clearing these lists. ![]() ![]() In this example, we are using a very simple program that allocates 100,000 Listeners, and stores them in 4 different lists. You can also include it in your own custom Eclipse install using Yoxos. The Memory Analyzer can be installed using the Install New Software dialog or through the Eclipse MarketPlace Client. If you’re a Java developer, the Eclipse Memory Analyzer Tool should certainly be in your debugging toolbox. In this tutorial I’ll outline 10 tips to help you use the MAT more effectively. The tool is useful for both tracking memory leaks and for periodically reviewing the state of your system. Lucky for us, the Eclipse Memory Analyzer ( MAT) can help provide details of an application’s memory use. Even if your application is properly disposing of all unused objects, it may still be requiring 10 or 100 times more memory than necessary. A subtle logic error can result in listeners never being disposed, ultimately leading to the dreaded OutOfMemory error. Analyzing and understanding the memory use of an application is challenging.
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