[HADOOP-3167] NameNode to report frequency, length, and type of garbage collection

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Duplicate
• Assignee: Unassigned
• Reporter: Marco Nicosia
• Created: 03/Apr/08 22:22
• Updated: 17/Apr/08 05:26
• Resolved: 03/Apr/08 22:29

Description

Right now, we don't know for how long, nor how frequently, the Hadoop NameNode engages in garbage collection. We can re-constitute this data from logs, but it'd be much better if Hadoop could report this as a metric along with all other metrics reported, so we can graph these alongside.