PostgreSQL High Availability/Scalability using HAProxy and PGBouncerI have multiple PostgreSQL servers for a web application. Typically one master and multiple slaves in hot standby mode (asynchronous streaming replication). I use PGBouncer for connection pooling: one instance installed on each PG server (port 6432) connecting to database on localhost. I use transaction pool mode. In order to load-balance my read-only connections on slaves, I use HAProxy (v1.5) wi
