The issue of not being able to see the smallest granularity (seconds) in CloudWatch Database Insights metrics.
This is Yuta Kikai (@fat47) from the Service Reliability Group (SRG) of the Media Division.
#SRGThe Service Reliability Group primarily provides comprehensive support for the infrastructure surrounding our media services, focusing on improving existing services, launching new ones, and contributing to open-source software (OSS).
This article is aboutThe time in seconds for metrics that were visible in RDS Performance Insights are not visible in CloudWatch Database Insights.This article summarizes the phenomenon described above.
I hope this is of some help.
What is CloudWatch Database Insights?The smallest granularity (seconds) cannot be seen in the Database Insights metrics.The data itself is collected on a second-by-second basis.In conclusion
What is CloudWatch Database Insights?
CloudWatch's database integrated monitoring feature is the migration destination for RDS Performance Insights and offers almost the same functionality as Performance Insights.
At the time I published the following blog post last June,November 30, 2025Performance Insights was scheduled to be discontinued and completely migrated to Database Insights, but this was postponed for some time.
When you open the Performance Insights screen, the following announcement is displayed:
June 30, 2026It appears that the complete transition has been postponed until further notice.
Database Insights metrics with the smallest granularityThe number of seconds cannot be confirmed.
FirstPerformance InsightsPlease see the screen.
18:59:14The same metricsDatabase InsightsI'll check it then.
18:5918:59The data itself is collected on a second-by-second basis.
The Performance Insights database load documentation clearly states that DB load is collected every second, as follows:
DBLoadI couldn't find any mention in the Database Insights documentation that it collects data every second, but when I contacted support, they said...Database Insights also retrieves database load values every second.That was the response I received.
In conclusion
There are about four months left until Performance Insights is discontinued, so it would be great if we could also check the time in seconds in Database Insights before then!
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