AWS Aurora MySQL Serverless CPU utilization is growing for unknown reason We have been using Aurora serverless databases in staging and production environments for a few months now, and find the CPU remains in the range 15-20% almost all the time. However in the past week the CPU utilisation has been growing, even during periods of zero load and is now at 38%. I'm worried this trend will continue further and begin to become an issue.

I saw the same trend in our Staging environment, but it only lasted 3 days and then returned to the usual level.

What could be driving this and how should I be debugging and resolving the root cause(s)?



SHOW FULL PROCESSLIST


Returns only 6 rows.



----- Update 4th Sept 2019 -----

In the end, I just continued to monitor it, and once it reached 50% it dropped back down. I guess it is a quirk of Aurora serverless? Would be great to hear from anyone else facing this issue as I hate not understanding things.
What solved it for me was setting the min and max instance count higher than before (forcing aurora to scale up, for example from min 2 ACU to min 4 ACU), and after scaling restoring the scaling settings.

I used 'Force scaling the capacity to the specified values when the timeout is reached' and 'Apply immediately'.

It also solved another issue we had, the 'Serverless database capacity' indicated 4 ACU while it was actually 2 ACU (as seen in the picture)