The maximum heap size that can be configured in a 32 bit JVM is 2GB. The heap space can be configured using the following JVM arguments: The space used by the Java Runtime to allocate memory to Objects and JRE Classes is called Heap. Before going to the details, we will discuss the following points: The purpose of this article is to explain the use of a heap analyzer tool to identify a memory leakage in larger enterprise Java applications, which use a larger size of heaps. It may occur only in production after running for a long time. Run the ‘Show Retained Set’ query on that row.Identifying the reason for an OutOfMemory error in Java applications with a larger heap size is a nightmare for a developer, because most of the OutOfMemory situations may not be identified during the testing phase.Select the Java Basics > GC Roots query.Reopen the heap dump, which will reparse the heap dump.Select ‘Keep unreachable objects’ using Window > Preferences > Memory Analyzer.Select the heap dump using Window > Heap Dump History right-click, Delete Index Files.I’m just going to copy-paste from this Stack Overflow answer. I bumped it to 12GB, by editing the appropriate line in MemoryAnalyzer.ini to: -Xmx12Gįinal note: you may want to show Unreachable objects. I also had to increase the size of the heap. (Note that adding these to the bottom of the file didn’t work). Users/lhochstein/.sdkman/candidates/java/current/bin I added the following two lines to the top of my file: -vm Instead, you want to edit the /Applications/mat.app/Contents/Eclipse/MemoryAnalyzer.ini file. Don’t edit the ist file, because then you’ll get an invalid code signature error. You need to tell Eclipse MAT where to find this version of Java. If you try to run Eclipse Memory Analyzer (MAT) out of the box on macOS, you’ll likely get an error that you need version 11 or above of Java, even if you have version 11 installed (say, with SDKMAN!).
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