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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-6279) Add JVM memory usage to JvmMetrics
Date Tue, 22 Sep 2009 23:03:16 GMT
Add JVM memory usage to JvmMetrics

                 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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