'Debugging RAM: Detect/Fix Memory Leaks in Managed Languages - Heap Deep Dive, Part 2' by debugagent java javascript
Yourkit Profiler, Eclipse MAT, NetBeans Profiler, Parasoft Insure++, etc. - Those are all great tools that can help a lot in digging deeper but they warrant a product review not a technical articleValgrind - This is an interesting native tool to debug memory leaks in LinuxSome static analysis tools such as SonarCloud, or FindBugs can detect leaks. This won't detect all leaks, but they can point at some problematic cases.
I explicitly run System.gc. This isn't an option in all languages and normally isn't recommended. But it “works”I run the test 100 times to make sure a small leak isn't adding up We can detect leaks using VisualVM while we reproduce the issue. Press the garbage collector button and keep your eye on memory usage. This should bring you to a point where the graph slowly grows based on a specific action you take. Once you have that you can narrow it down to a method and a test case.What if RAM is just getting chewed up while you're literally doing nothing?
You can also make use of verbose GC to see details about the collected object. I often feel that this is a bit like drinking from a firehose. It's very hard to debug even a simple application with that output. But it can be useful if you're looking for something very specific.Leaks in managed platforms are effectively references to an element that is no longer necessary. There are many samples of this, but they all boil down to discarding said reference.
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