jhat Command Examples

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}} {{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}}