Add JVM memory usage to JvmMetrics
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Key: HADOOP-6279
URL: https://issues.apache.org/jira/browse/HADOOP-6279
Project: Hadoop Common
Issue Type: Improvement
Affects Versions: 0.20.2, 0.21.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Priority: Minor
The JvmMetrics currently publish memory usage from the MemoryMXBean. This is
useful, but doesn't include the total heap size (eg as displayed in the JT Web
UI).
It would be nice to expose Runtime.getRuntime().maxMemory() as part of
JvmMetrics.
It seems that Runtime.getRuntime().totalMemory() (used by the JT for "memory
used") is the same as the 'memHeapCommittedM' which already exists.
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