How do I run stand-alone Eclipse MAT?

Question

I generated hprof using jmap. ``` sudo ~/jdk/bin/jmap -F -dump:file=app.hprof 5003 ``` Now, I am getting OOM / 'Java Heap Space' error while parsing *.hprof in eclipse. I think I need to run it as stand-alone. How do I run it? any references?

Accepted Answer

I assume, you've downloaded Eclipse MAT in the form of Standalone Eclipse RCP Application. If not - do so now, and extract the archive to a folder that suits you.

You're getting the OOME, because MAT has too few memory available (the heap-dump you're parsing is too big).

To make the heap bigger, edit your `MemoryAnalyzer.ini` file (it should be in your MAT directory), and add the following lines to it:

```
-vmargs
-Xmx2048M
```

The `2048M` means 2 gigabytes of heap space will be available to the JVM. Perhaps 1 gigabyte will be enough for you.

Note! If you are using MAT as an Eclipse plugin, you can probably do the same trick by editing `eclipse.ini` in your Eclipse directory.

How do I run stand-alone Eclipse MAT?

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