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Questions tagged [jhat]

jHat refers to Java Heap Analysis Tool.

Definition:

jhat refers to Java Heap Analysis Tool.

It is a tool that can be run in the command line, with which the user can analyze a heap by browsing a binary heap dump file.

Example Usage:

jhat [ options ] <heap-dump-file>

Important Links:

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How do I install jhat?

I have downloaded Java JDK 17 and I need to analyse a dump I did with the jmap command. I have searched about how to do it and jhat is apparently an already installed command that lets you analyse the dumps from jmap but when I run the jhat command…
Mr.D
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How do I trace jmap/jhat output back to lines in my code that are causing PermGen OutOfMemory errors?

I’m using JBoss 7.1.3, JDK 1.6, and Mac 10.9.1. After a number of deploys/undeploys of my WAR file using the Maven Jboss AS plugin, my server dies with the below error … 15:05:10,120 ERROR [org.xnio.listener] (Remoting…
Dave
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OQL for finding new objects only in heap dumps?

Does anyone know the OQL syntax for finding new objects only in a heap output? I can't find good documentation on OQL options, sun even has an example of new-only output without sample syntax of the query that generated it.What I've done is Created…
Steve B.
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