Hi, I am planning to commit AMBARI-1589 ( Incorrect (Negative) values are shown for memory metrics ) for Ambari-2.2.2 release
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 . This is a regression caused by AMBARI-15448<https://issues.apache.org/jira/browse/AMBARI-15448> which 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. -- Thanks and Regards, Aravindan Vijayan
