In addition to PostgreSQL server connection status, PgBouncer's administration console can provide details regarding clients within its queue. Maintaining a healthy and active PgBouncer queue is the key to high throughput over limited resources. In this case, we artificially limited the amount of server connections available to clients, which means that there is potential for stubborn or broken clients to prevent connection turnover.

This, of course, will effectively remove the connections from the pool, creating a bottleneck that could lead to choking transaction throughput. Let's explore the PgBouncer console a bit more to learn what it knows about the database clients attempting to communicate with PostgreSQL.