Hi Hadoopers, My dedicated Namenode box has 48G of memory, 40G is allocated for NN. HEAP
This is from 50070/dfshealth.jsp *28540193 files and directories, 32324098 blocks = 60864291 total. Heap Size is 23.34 GB / 38.54 GB (60%) * *The Heap is fluctuating between less than 20G up to almost 100%* * * * * However, from top command Residence size is constantly at 39G not matter how low of the memory usage in defshealth.jsp page PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 4628 apps 19 0 40.4g 39g 22m S 132.9 83.9 44821:08 /usr/java/jdk/jre/bin/java -Dproc_namenode -Xmx40000m Is this the time to upgrade the ram to the namenode box? I remember the easy rule of thumb is 150 bye of every 1M for blocks+file+dir, so *60864291 * 150byte is around 9G. I just don't understand why 40G seems to be used up.?* *Please educate..* * * *Hope this make sense* *P*
