what would be the right metric to use in a dashboard to get the Total user Transactions for a web app.
It would depend on a couple of things. Are you dealing with HTTP or HTTPS? And are you just looking for the total number of web requests? I.E. port 80/443 requests?
I am dealing with HTTP only. I am already using HTTP server requests. I see two graphs on this dashboard(full view): https://www.extrahop.com/extrahop-in-action/solutions/web-monitoring/
web requests ( I belive these are HTTP server requests)
total user transactions ( I am not sure what metric is this one)