Mastering the Azure Cosmos DB Change Feed | Justine Cocchi | Azure Cosmos DB Conf 2026

by Microsoft Developer

Justine Cocchi explains how Azure Cosmos DB Change Feed works and how to use it effectively in production, including common consumption models, partitioning/lease management, and practical debugging and monitoring techniques.

Full summary based on transcript

What the Change Feed is used for

The session describes Azure Cosmos DB Change Feed as a persistent, ordered log of changes to data, and positions it as a building block for:

How Change Feed works (conceptual + “under the hood” focus)

Justine covers how Change Feed behaves as an ordered stream of changes and what that implies for production usage:

Consumption models

The talk walks through common ways teams consume Change Feed in real systems, including trade-offs between approaches (for example, how you scale out consumers and coordinate processing).

Partitioning and lease management

A major focus is on scaling Change Feed processing safely:

Debugging, monitoring, and common failure modes

The session highlights frequent issues teams hit in production and how to detect and fix them:

Demo: diagnosing lag and recovering processing

Justine includes a demo of a real-world Change Feed application that shows:

Advanced features built on the same patterns

The session closes by connecting Change Feed patterns to more advanced Cosmos DB capabilities, including:

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