jmap

all

Java memory map tool.

Examples (5)

Print shared object mappings for a Java process (output like pmap)

jmap java_pid

Print heap summary information

jmap -heap filename.jar java_pid

Print histogram of heap usage by type

jmap -histo java_pid

Dump contents of the heap into a binary file for analysis with jhat

jmap -dump:format=b,file=path/to/file java_pid

Dump live objects of the heap into a binary file for analysis with jhat

jmap -dump:live,format=b,file=path/to/file java_pid