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jmap

List of commands for jmap:

  • jmap:tldr:76ca3 jmap: Print histogram of heap usage by type.
    $ jmap -histo ${java_pid}
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    explain this command
  • jmap:tldr:8f459 jmap: Print heap summary information.
    $ jmap -heap ${filename-jar} ${java_pid}
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    explain this command
  • jmap:tldr:ae628 jmap: Print shared object mappings for a Java process (output like pmap).
    $ jmap ${java_pid}
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    explain this command
  • jmap:tldr:ef5b3 jmap: Dump contents of the heap into a binary file for analysis with jhat.
    $ jmap -dump:format=b,file=${filename} ${java_pid}
    try on your machine
    explain this command
  • jmap:tldr:ffa13 jmap: Dump live objects of the heap into a binary file for analysis with jhat.
    $ jmap -dump:live,format=b,file=${filename} ${java_pid}
    try on your machine
    explain this command
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