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ClickHouse is a large-scale user of Postgres logical replication for Change Data Capture, replicating over 200 TB of data per month from Postgres across 300+ customers. Some individual customer deployments exceed 60 TB, moving tens of terabytes monthly.

In this talk, we’ll share our journey of scaling Postgres logical decoding to this level—covering the Postgres-specific optimizations, challenges, and lessons learned along the way, and how we refined hundreds of corner cases to make it truly production-ready at scale.

We’ll take you behind the scenes of how we operate Postgres logical replication at scale: deploying fleets of clusters through Kubernetes, rolling out non-disruptive upgrades across hundreds of tenants, and developing end-to-end observability and alerting for logical replication, giving both our teams and customers deep visibility into system health and reliability.

Attendees will gain practical insights into what it takes to manage enterprise-grade logical replication at massive scale.