So I'm fairly new to AWS and I'm hoping you guys can reassure me as I couldn't find anything in the AWS documentation either way. I actually have two questions, the first:
I have an RDS MySql instance in AWS that wasn't set up by myself (a previous employee did this). This instance is more powerful than we need so I want to reduce it's instance class in order to reduce costs. The current instance is a multi-AZ configuration.
Can I simply change it and apply the changes at the next maintenance schedule without losing data?
How can I identify how much of the RDS storage is currently in use? As I'd like to decrease this if possible as we aren't even using 50% of it.