Counting the total number of database connections

Our application currently only allows for a limited number of concurrent database connections. As our application user base grows, we need to monitor these connections proactively to ensure that we do not hit our concurrency limit and we know when we need to scale out the database infrastructure further. 

In the last recipe of this chapter, we will monitor database transactions over the past week to identify if there are certain times or days when we might be close to our concurrency limit.