JVM memory Generate Heap Dump jmap -J-d64 -dump:format=b,file=<path to dump file> <jvm pid> Generate Heap Dump on OOM Add following params to JVM: -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=<path to dump file> Analyse Heap Dump Heap dump can be analyzed with jhat or Eclipse Memory Analyzer.