Migrating a MySQL database to PostgreSQL is a complex process that involves schema conversion, data transfer, query optimization, and performance tuning. In this case study, we document a real-world migration of e-commerce platform’s database from MySQL 8.0 to PostgreSQL 15. The study includes performance benchmarks before and after migration.
Project Overview
| Industry | E-commerce |
| Database Size | ~120 GB |
| Number of Tables | 200+ |
| Queries per Second (QPS) | ~350 |
| Replication Setup | MySQL Master-Slave is switched to PostgreSQL Streaming Replication |
| Primary Use Case | OLTP (Online Transaction Processing) |
| Goal | Improve read-heavy performance, complex query execution and JSON processing |
Pre-Migration Performance Benchmarks
Before migration, we collected key performance metrics on MySQL 8.0 using sysbench and EXPLAIN ANALYZE.