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Namenode heapsize

Namenode heapsize

New Contributor

Hi,

 

In my clsuter, namenode heap memory that is being used is around 8 GB (committed is 12.5 GB and total is 12.9 GB). However, there are around 8.5 million blocks in the cluster. So, since each block occupies 182 bytes of memory, I thought the total heap memory would be somewhere around 1.5 GB (8.5 million * 182 byes). Am I misssing something here?

 

Thanks