Hi We run our Pig jobs in Hadoop 0.23 which has the new YARN architecture.
I had few questions on memory used by the jobs : We have following settings for memory. mapred.child.java.opts mapreduce.map.memory.mb mapreduce.reduce.memory.mb yarn.app.mapreduce.am.resource.mb yarn.app.mapreduce.am.command-opts 1. I want to understand these settings to make better use of Hadoop cluster. 2. How is Memory Allocated to Container ? Does any of the above settings result in change in container ? 3. Any other memory settings we need to be aware of ? 4. I heard there was a virtual memory and physical memory involved. Is there any propery documentation/guide that can make the memory management easy. Thanks Narayanan
