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In addition to the Counter & Timer metrics collected from EclipseLink, a computed metric of Timer/Counter (divided by) is also sent. This metrics provides the average time taken for an operation across time. 

For example, if

 Counter Metric : Counter.ReadAllQuery.HostRoleCommandEntity = 10000
 Timer Metric : Timer.ReadAllQuery.HostRoleCommandEntity = 50
 Computed Metric (Avg time for the operation) : ReadAllQuery.HostRoleCommandEntity = 200 (10000 div by 50)
 

As seen above, the computed metric name will be the same as the Timer & Counter metric except without the 'Timer.' / 'Counter.' prefix.