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19 lines
399 B
Markdown
19 lines
399 B
Markdown
# jmap
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> Java Memory Map Tool.
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- Print shared object mappings for a Java process (output like pmap):
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`jmap {{java_pid}}`
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- Print heap summary information:
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`jmap -heap {{filename.jar}} {{java_pid}}`
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- Print histogram of heap usage by type:
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`jmap -histo {{java_pid}}`
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- Dump contents of the heap into a binary file for analysis with jhat:
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`jmap -dump:format=b,file={{filename}} {{java_pid}}`
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