I have just added a new section to the Datomic documentation on monitoring and performance. If you are tuning Datomic, it is a must-read.
I want to call attention in this blog post to one aspect of Datomic monitoring that might not be immediately apparent. Which is that you can use Amazon CloudWatch to monitor any instance of Datomic Pro, regardless of which storage you are using, and regardless of whether you are running any of your processes in the AWS cloud.
Part of the value of a good cloud architecture is being able to mix-and-match the pieces.