Oracle Interview Question
Site Reliability EngineersTeam: GGN
Country: India
Interview Type: In-Person
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Heap dumps are useful to address issues like performance tuning,out of memory exception.Usually in Dev and QA environment,it's difficult to reproduce few issues like OME.So we can generate memory dumps in production in environment by setting argumnts like 'XX: -heapdumponoutofmemryexception' and by using 'visual vm' tools,we can analyze dumps. Dumps give info like how many live instance are there per class and there memory occupation. This info helps u to pin point the root cause.however it's best practice setting references explicitly to null to avoid OME.
- raghava.javvaji September 21, 2012