What

Output the java.lang.OutOfMemory from server log or stdout/err log.

Why

Run out of Memory at:

• Java heap area
• Permanent area
• Native memory area

Memory leakage

• Increasing usage of memory and running out of memory finally
• If leakage is seen in Java heap, suspect: Non closure of JDBC object, Cached object or Long life object

JVM's bug (e.g. GC's compaction is a mess)

How

• Analyze the GC log
• Analyze the Java process memory
• Analyze details of the Java process memory

Labs