Add SQL queries rate to Controller Dashboard
Although the rapid action about shifting primary queries to the replicas is going to the end, I found it useful to have a panel to watch for the SQL queries rate to replica/primary databases. It's convenient to have the data before and after an optimization. The prometheus metrics are long-term, hence we can look in in a very far away in the past.
For example, this is a panel showing the reduction of queries to the primary:
I don't add this panel to the stage group dashboards because they are already very dense already.