Most applications primarily read from the database, with only a small percentage of the interactions involving writes. The number of active connections on the primary database we calculated for the connection pools likely includes read traffic. Offloading as many queries to read replicas as possible and conserving access to the primary writable instance increases the amount of overall database activity performed by the application servers without increasing the load on the primary database. If you aren't already accessing read replicas at least for longer running queries such as reports, you should consider immediately moving reporting or analytics to read replicas.
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