PgBouncer is a lightweight connection pooler that sits in front of PostgreSQL to stop a busy application from exhausting the database's connection limit. It's a narrow but high-leverage skill: DBAs who configure pooling correctly can keep a Postgres instance stable under load that would otherwise force an expensive hardware upgrade.
The skills most often needed alongside PgBouncer (connection pooling) in the same roles — build these together to widen your options.
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