A company has a transaction-processing application that is backed by an Amazon RDS MySQL database. When the load on the application increases, a large number of database connections are opened and closed frequently, which causes latency for the database transactions. A solutions architect determines that the root cause of the latency is poor connection handling by the application. The solutions architect cannot modify the application code. The solutions architect needs to manage database connections to improve the database performance during periods of high load. Which solution will meet these requirements?