Gaps in AWS CloudWatch Metrics graphs [closed]

Question

I have a graph with a plotted line showing the count sum each hour, however this plotted line has some gaps. See this screengrab, near 07/29:

Does anyone know why? If it means zero, then why doesn't the line continue to the X-axis?

Jean

There must be no email sent in that time thats why? – Northey

Answer 1

All CloudWatch knows is that it didn't receive any data for that metric during that time period. It doesn't know if it was due to a failure in the data reporting or something else. So it shows that as a gap.

You would have to have something actually sending a value of "0" during reporting periods where there is no activity for that metric, in order fill in the gaps. That's usually more trouble than it's worth.

Insistency

In other cases, a line is drawn from the last point that was received to the new point. When does cloudwatch "decide" that a point of data is missing rather than simply stretching a line from the last point received? – Communize

Cloudwatch should support an option to say, "interpolate null as zero" when rendering graphs. – Purnell

@Purnell CloudWatch now supports this when you use Metric Math, it's super easy to enable. See the edit on the answer. – Horseshoes