Tool or tricks to analyze offline Java heap dumps (.hprof)

Question

Are there any tools that allow offline analysis (including summary/sorting/sifting) of an .hprof file? Or can you run VisualVM, hat etc in batch mode?

I'm interested in something that can take an input .hprof file, crunch it and generate reports.

I assume you would need to pass in a bunch of options to configure the report, so if you know any helpful tips, please weigh in.

Preferably scriptable so I could run a bunch at once.

By "offline" do you mean "headless"? I think of "offline" as meaning "outside the context of the running JVM instance". — Mark Peters, Dec 03 '10 at 18:34

score 20 · Accepted Answer · edited Jul 26 '15 at 17:45

20

Eclipse Memory Analyzer does everything you need.

edited Jul 26 '15 at 17:45

durron597

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answered Dec 03 '10 at 16:44

user85155

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can you add command line switches to say "crunch this .hprof offline"? – user331465 Dec 03 '10 at 16:48
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Look for ParseHeapDump.sh (.bat on Windows) in this FAQ: http://wiki.eclipse.org/MemoryAnalyzer/FAQ – Michael Brewer-Davis Dec 03 '10 at 17:28

score 14 · Answer 2 · edited Jul 26 '15 at 18:21

14

You can use jhat to parse/navigate the memory dump of an .hprof file.

$ jhat heapdump.hprof
Reading from heapdump.hprof...

Started HTTP server on port 7000
Server is ready.

The tool comes with the JDK.

edited Jul 26 '15 at 18:21

malana

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answered Sep 16 '13 at 14:13

user2426263

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score 2 · Answer 3 · answered Dec 03 '10 at 16:23

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Can you use jmap -histo ? What sort of report are you looking to extract?

answered Dec 03 '10 at 16:23

Peter Lawrey

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jmap -histo does not work against a .hprof file ; it expects a pid – user331465 Dec 03 '10 at 16:38
Basically anything that would help identify memory leaks. Offhand I'd say 'biggest objects' --both shallow and deep. – user331465 Dec 03 '10 at 16:49

score 2 · Answer 4 · answered Dec 03 '10 at 17:01

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hard to beat yourkit java profiler. It costs money, but it is worth every penny.

answered Dec 03 '10 at 17:01

james

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but can you run heap dump analysis "in batch", i.e. via a script to generate the reports rather than waiting...waiting..waiting...while it loads and churns...? – user331465 Dec 03 '10 at 17:19

score 1 · Answer 5 · answered Dec 01 '20 at 20:30

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Also, if you use IntelliJ IDEA, you can open *.hprof memory snapshots, too: Run | Open Profiler Snapshot | Open

Official documentation: https://www.jetbrains.com/help/idea/analyze-hprof-memory-snapshots.html

answered Dec 01 '20 at 20:30

Attila Csipak

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score 0 · Answer 6 · answered Oct 31 '12 at 00:32

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JDK6 comes with jhat which parses and creates an html report.

http://docs.oracle.com/javase/6/docs/technotes/tools/share/jhat.html

answered Oct 31 '12 at 00:32

robbin

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score 0 · Answer 7 · answered May 20 '11 at 13:02

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Es MAT (http://www.eclipse.org/mat/) is the way to go. Check http://kohlerm.blogspot.com/search/label/memory, especially http://kohlerm.blogspot.com/2009/07/eclipse-memory-analyzer-10-useful.html

answered May 20 '11 at 13:02

kohlerm

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Tool or tricks to analyze offline Java heap dumps (.hprof)

7 Answers7