问题
I have generated a heap dump from my java application which has been running for some days with the jmap tool -> this results in a large binary heap dump file.
How can I perform memory analysis of this heap dump within IntellIJ IDEA?
I know that there are tools for Eclipse and Netbeans but I would rather use IDEA if possible.
The basic results of the analysis would tell me the number of instances of each object in memory, per-class, to allow me to be able to start debugging memory leaks.
回答1:
The best thing out there is Memory Analyzer (MAT), IntelliJ does not have any bundled heap dump analyzer.
回答2:
I would like to update the answers above to 2018 and say to use both VisualVM and Eclipse MAT.
How to use:
VisualVM is used for live monitoring and dump heap. You can also analyze the heap dumps there with great power, however MAT have more capabilities (such as automatic analysis to find leaks) and therefore, I read the VisualVM dump output (.hprof file) into MAT.
Get VisualVM:
Download VisualVM here: https://visualvm.github.io/
You also need to download the plugin for Intellij:
Then you'll see in intellij another 2 new orange icons:
Once you run your app with an orange one, in VisualVM you'll see your process on the left, and data on the right. Sit some time and learn this tool, it is very powerful:
Get Eclipse's Memory Analysis Tool (MAT) as a standalone:
Download here: https://www.eclipse.org/mat/downloads.php
And this is how it looks:
Hope it helps!
回答3:
You can also use VisualVM Launcher to launch VisualVM from within IDEA. https://plugins.jetbrains.com/plugin/7115?pr=idea I personally find this more convenient.
回答4:
There also exists a 'JVM Debugger Memory View' found in the plugin repository, which could be useful.
回答5:
You can just run "Java VisualVM" which is located at jdk/bin/jvisualvm.exe
This will open a GUI, use the "File" menu -> "Load..." then choose your *.hprof file
That's it, you're done!
回答6:
VisualVM plugin for Intellij Idea
回答7:
You can install the JVisualVM plugin from here: https://plugins.jetbrains.com/plugin/3749?pr=
This will allow you to analyse the dump within the plugin.
来源：https://stackoverflow.com/questions/26460410/how-can-i-analyze-a-heap-dump-in-intellij-memory-leak