How to get heap dump in case of outofmemory

Question

tomcat is outofmemory and unresponsive on the server. Is there any way to know what is occupying memory? Please recommend tools and methods.

Answer 1

JDK_HOME/bin/
Execute jmap -dump:format=b,file=/home/longhao/heamdump.out <pid>
You can also pass -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=${DOMAIN_HOME}/logs/ mps"
dump and download it to the local system
Use Memory Analyzer to analyze