Re:Re: Re: How to know the root reason to cause RegionServer OOM?

[David chen]

Thanks for guys reply, its indeed helped me.
Another question, I think there are two possibilities to kill RegionServer 
process:
1. When JVM inspects that the memory, RegionServer has occupied, exceed the 
max-heap-size,  then JVM calls positively the command configured by option 
"-XX:OnOutOfMemoryError=kill -9 %p" to kill RegionServer  process. 
2. RegionServer process does not reach the max-heap-size, but new application 
need to allocation memory,  if lack of memory, OS will choose to kill some 
processes, RegionServer unfortunately becomes the first choice, so it  is 
killed by OS.
Is my understanding right? If so, how to know which possibility my scene is?
Any ideas can be appreciated!