Explore the fundamental differences in transaction processing between Amazon Aurora DSQL and Amazon Aurora PostgreSQL in this 58-minute conference talk from AWS re:Invent 2025. Dive deep into the code-level mechanics of how each database system handles concurrent transactions that access or modify data simultaneously. Discover the distinct approaches these two database technologies employ for transaction management and understand the architectural implications of these differences. Gain comprehensive insights into database scalability principles and develop the analytical skills to apply these concepts to your own system architectures and application code, guided by AWS VP and Distinguished Engineer Marc Brooker's expert analysis of transaction processing fundamentals.