This article explains how to use PostgreSQL pipeline mode to improve application performance by reducing network latency when querying Amazon RDS for PostgreSQL and Aurora PostgreSQL.

• Pipeline mode batches multiple queries into single network round trip instead of separate trips
• Reduces network latency from 10 seconds to 0.2 seconds in example with 50 queries
• Requires switching connection to pipeline mode using Psycopg3's Connection.pipeline() method
• Multiple operations queued on client side until sync() establishes synchronization point
• Results received in batches when server flushes output buffer
• All statements wrapped in implicit transaction; errors invalidate subsequent statements
• Not suitable for queries requiring results from previous operations
• Requires adequate memory resources on both client and server
• Only supports asynchronous operations using extended query protocol

PostgreSQL pipeline mode offers significant performance improvements for batch query workloads, but requires careful evaluation and adequate resources before production deployment.