Java throubleshooting

Articles

1. Types of profiles : link , Youtube video

2. How to get high CPU usage in java(thread dump) : link 

3. Heap dump analysis, Youtube video : link

4. Article for OutOfMemmoryError : link

Some useful commands
- jps
- jmap -histo:[live] PID -> for historgram
- jmap dump : filename PID -> heap dump
  example: jmap -dump:live,format=b,file=/tmp/dump.hprof
- XX:HeapDumpOutOfMemoryError and XX:HeapDumpFileLocation $some_path