What pgbouncer does is indeed core functionality. Compare Postgres to MySQL and sql server, where analogous standalone connection pools are rarely used. The fun

What pgbouncer does is indeed core functionality. Compare Postgres to MySQL and sql server, where analogous standalone connection pools are rarely used. The fundamental reason pgbouncer needs to exist is Postgres’ utterly retrograde design. Other examples: xid wraparound, conflict with recovery, lack of undo space.