[HADOOP-2762] Better documentation of controls for memory limits on hadoop daemons and Map-Reduce tasks

• Type: Improvement
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.16.0
• Fix Version/s: 0.18.0
• Component/s: documentation, scripts
• Hadoop Flags: Reviewed
• Assignee: Amareshwari Sriramadasu
• Reporter: Arun Murthy
• Created: 01/Feb/08 06:26
• Updated: 08/Jul/09 16:52
• Resolved: 17/Jun/08 11:10

Description

We have had a spate of questions about memory usage of hadoop daemons and Map-Reduce jobs and how to configure them.

We should better document mapred.child.java.opts in the Map-Reduce tutorial and cluser_setup.html and link to http://hadoop.apache.org/core/docs/r0.15.3/cluster_setup.html#Configuring+the+Environment+of+the+Hadoop+Daemons.