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• jmap -dump:format=b,file=e.bin pid

• jmap -histo pid

• jmap -histo:live pid
  • 会先触发 Full GC

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• Tool
  • jvisualvm
  • Eclipse Memory Analysis Tool (MAT)

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-XX:+HeapDumpBeforeFullGC -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/tmp/heapdump.hprof

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