*Problem:* The "ls" is taking noticeable time to respond. *system:*I have about 1.6 million files and namenode is prety much full with heap(2400MB).
I have configured dfs.handler.count to 100, and all IPC server threads are locked onto a Queue (I think callQueue)
In the namenode logs, I occasionally see Out of memory Exception. Any suggestions, to improve the response time of system ?I can increase the dfs.handler.count to 256, but I guess I will see more OOM exceptions.
