[rgbrenner]

I tried recreating your experiment.. created an aurora Serverless v2 db with 0.5 - 2 ACUs in us-east-1.. since you said it was for Wordpress, I disabled the multi-AZ replication, since AFAIK, WP can't use separate reader/writer connections (mentioning this because you didn't say anything about it in your article)... then I let it sit overnight so it had time to create everything.

It's sitting at 23% of 0.5 ACU.

So its either the replication setting (haven't tested with it on yet), or.. AWS is a shared service... wonder if it's similar to EC2, in that sometimes you get an instance on a machine that's more overloaded and the instance doesn't perform as well.. and you have to destroy it and try again. Might want to try it again.

Edit: I don't think its the replication setting... tried that with a new db and its at 25% on each replica after an hour.