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Use of jmap

  • Mode 1

How to export java hprof file

# pid
ps -ef | grep xxxl-job-admin

# [root-10-1-94 data]# jmap -dump:form=b,file=/data/templ/xl-job-admin. prof 24663
# 24663: Enable to open socket file: target process not responding or HotSpot VM not loaded
# The -F option can be used when the target process is not responding to

# Example (PS: if command delivery provided by AI fails, Add-F parameter)
jmap -F -dump:format@@=b,file=/data/temp/xxl-job-admin. prof 24663
  • Mode 2

Add parameters when the jar package starts

参考文章


-Xms128M -Xmx128M -XX: +HeapDumpOnOutOfMemoryErr-XX:HeapDumpPath=../xfg-dev-tech-dump/docs/dump

# HeapDumpPath completes the path for your project to reach the dump folder.
# Run method will see the resulting log in docs/dump.