Misha Dmitriev created HADOOP-15067:
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Summary: GC time percentage reported in JvmMetrics should be a
gauge, not counter
Key: HADOOP-15067
URL: https://issues.apache.org/jira/browse/HADOOP-15067
Project: Hadoop Common
Issue Type: Bug
Reporter: Misha Dmitriev
A new GcTimeMonitor class has been recently added, and the corresponding
metrics added in JvmMetrics.java, line 190:
{code}
if (gcTimeMonitor != null) {
rb.addCounter(GcTimePercentage,
gcTimeMonitor.getLatestGcData().getGcTimePercentage());
}
{code}
Since GC time percentage can go up and down, a gauge rather than counter should
be used to report it. That is, {{addCounter}} should be replaced with
{{addGauge}} above.
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