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jhat — Java heap analysis tool. More information: <https://docs.oracle.com/javase/8/docs/technotes/tools/un

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Problem

How to use the jhat command: Java heap analysis tool. More information: <https://docs.oracle.com/javase/8/docs/technotes/tools/unix/jhat.html>.

Solution

jhat — Java heap analysis tool. More information: <https://docs.oracle.com/javase/8/docs/technotes/tools/unix/jhat.html>.

Analyze a heap dump (from jmap), view via HTTP on port 7000:
jhat {{dump_file.bin}}


Analyze a heap dump, specifying an alternate port for the HTTP server:
jhat {{[-p|-port]}} {{port}} {{dump_file.bin}}


Analyze a dump letting jhat use up to 8 GB RAM (2-4x dump size recommended):
jhat -J-mx8G {{dump_file.bin}}

Code Snippets

Analyze a heap dump (from `jmap`), view via HTTP on port 7000

jhat {{dump_file.bin}}

Analyze a heap dump, specifying an alternate port for the HTTP server

jhat {{[-p|-port]}} {{port}} {{dump_file.bin}}

Analyze a dump letting `jhat` use up to 8 GB RAM (2-4x dump size recommended)

jhat -J-mx8G {{dump_file.bin}}

Context

tldr-pages: common/jhat

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