How can I view memory usage, thread dump for java programs, from command line?

Question

Is there any known command line tool to ask the JVM to see memory usage and thread dumps of a java program. something like a headless jvisualvm?

score 11 · Accepted Answer · answered Dec 09 '11 at 18:35

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You can use jstat to get gc information, jstack to get stack traces and jmap to get memory statistics and memory dumps for off-line inspection.

answered Dec 09 '11 at 18:35

Roger Lindsjö

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@KaizenSoze Did you mean jhat? I mentioned jmap, but maybe you think I should add info about it? – Roger Lindsjö Feb 10 '12 at 08:14

Jonathon Faust · Answer 2 · 2011-12-09T18:35:06.517

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Ctrl+Break will produce a thread dump and various statistics.

This is documented, along with kill -QUIT, here.

edited Dec 09 '11 at 18:35

answered Dec 09 '11 at 18:27

Jonathon Faust

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score 1 · Answer 3 · answered Dec 09 '11 at 18:47

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Look into the official debugger, jdb. You have to run your java program with a certain flag, but then you should be able to look at a bunch of stuff from the commandline.

answered Dec 09 '11 at 18:47

Thomas

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How can I view memory usage, thread dump for java programs, from command line?

3 Answers3