Introduction to JRockit Dump operations

JRockit's dump command is simple, if not familiar.

First Use the command:

Jrcmd <pid> Help

Get the relevant options. Then using the option Hprofdump, use this parameter to note that you should use this form of command:

Jrcmd <pid> Hprofdump filename=/home/hadoop/test.hprof

As shown in figure:

Need to take filename This parameter, or do not know the build file storage path (in addition to the absolute path), I used the default and relative path, do not know where the generated files are stored (not yet identified)

The file suffix uses hprof to facilitate memory analysis.

Purpose: This document is mainly used for analysis of memory.