Hi, You need to set mapreduce.map.java.opts and mapreduce.reduce.java.opts instead of mapred.child.java.opts to tune JVMs when you use MRv2. Please note that you also need to tune mapreduce.map.memory.mb/mapreduce.reduce.memory.mb to notify ResourceManager of the amounts of resource usage.
This doc is also useful for you. http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/ClusterSetup.html Thanks, - Tsuyoshi On Thu, May 22, 2014 at 10:58 PM, ch huang <justlo...@gmail.com> wrote: > hi,mailist: > i want to know if this option still cause limitation in YARN? -- - Tsuyoshi
