[HADOOP-1562] Report Java VM metrics

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.14.0
• Component/s: metrics
• Assignee: David Bowen
• Reporter: David Bowen
• Created: 03/Jul/07 22:43
• Updated: 20/Aug/07 18:12
• Resolved: 16/Jul/07 18:45

Description

It would be useful to have each Java process in Hadoop (JobTracker, TaskTracker, NameNode and DataNode) report some Java VM metrics. E.g. heap/non-heap memory used/committed, number of garbage collections and percentage of time spent in GC, number of threads that are runnable/blocked/waiting/etc.