Case Study: How Uber Migrated from PostgreSQL 16 to CockroachDB 24.2 for Global Transaction Consistency

In Q3 2024, Uber’s global payments team hit a hard ceiling: PostgreSQL 16’s single-leader replication couldn’t support 12,000 cross-region transactions per second (TPS) with p99 latency under 200ms, costing $2.1M annually in SLA penalties and retry o...