Aravindan Vijayan created AMBARI-15892:
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Summary: Incorrect (Negative) values are shown for memory metrics
Key: AMBARI-15892
URL: https://issues.apache.org/jira/browse/AMBARI-15892
Project: Ambari
Issue Type: Bug
Reporter: Aravindan Vijayan
Assignee: Aravindan Vijayan
Priority: Blocker
Issue
In the "NameNode HostLoad" graph, the negative values are seen for the computed
metric "Memory Utilization" which goes by the formula :
( mem_total - (mem_free + mem_cache) ) *100 / mem_total
Bug
AMBARI-15448 changed the way memory metrics are being reported to AMS. This
lead to a double subtraction of mem_cached, thereby leading to a negative value
intermittently.
Fix
Change the widget to :
( mem_total - mem_free ) *100 / mem_total
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