Hi. I'm trying to tweak heap sizes for the Hadoop daemons, i.e. namenode/datanode and jobtracker/tasktracker. I've tried setting HADOOP_NAMENODE_HEAPSIZE, HADOOP_DATANODE_HEAPSIZE, and so on in hadoop-env.sh, but the heap size remains at the default of 1,000MB.
In the cluster setup documentation, I see references to setting HADOOP_NAMENODE_OPTS, HADOOP_DATANODE_OPTS, and so on in hadoop-env.sh. Is this the proper way to set heap sizes, and if so, what is the proper syntax within the OPTS values? Thanks! Kai Ju Liu
