MySQL to PostgreSQL Database Migration: A Practical Case Study
Migrating a database from MySQL to PostgreSQL is a challenging endeavor that demands meticulous planning and execution. This process involves intricate schema conversions, seamless data transfers, query optimizations, and fine-tuning for enhanced performance. In this case study, we delve into a real-world scenario involving the migration of an e-commerce platform’s database from MySQL 8.0 to PostgreSQL 15. Throughout this migration journey, we highlight the critical steps taken and the performance improvements achieved post-migration.
Project Overview
Industry
The database migration pertains to the e-commerce sector, where data integrity and performance are paramount for seamless transactions.
Database Size
The database being migrated is substantial, with a size of approximately 120 GB, indicating the complexity and scale of the operation.
Number of Tables
With over 200 tables in the database, the migration process requires meticulous table mapping and data transformation to ensure accuracy and efficiency.
Queries per Second (QPS)
Handling around 350 queries per second underscores the need for a robust database system capable of supporting high transaction volumes.
Replication Setup
The migration involves transitioning from a MySQL Master-Slave replication setup to PostgreSQL Streaming Replication, ensuring data consistency and availability.
Primary Use Case
The database primarily serves Online Transaction Processing (OLTP) requirements, highlighting the critical role of the database in real-time transaction management.
Goal
The overarching goal of this migration is to enhance read-heavy performance, optimize complex query execution, and streamline JSON processing for improved operational efficiency.
Pre-Migration Performance Benchmarks
Before initiating the migration process, comprehensive performance benchmarks were conducted on the existing MySQL 8.0 database. Key performance metrics were gathered using tools such as `sysbench` and `EXPLAIN ANALYZE` to assess the database’s efficiency and identify areas for improvement.
By establishing a solid performance baseline, the migration team could track and measure the enhancements achieved post-migration accurately. These benchmarks serve as a crucial reference point for evaluating the effectiveness of the migration process and the subsequent impact on database performance.
In the next segments of this case study, we will delve deeper into the migration strategy, schema conversion challenges, data transfer methodologies, query optimization techniques, and the final performance benchmarks post-migration. Stay tuned for insightful analysis and practical insights into the MySQL to PostgreSQL database migration journey.
Stay tuned for the upcoming sections as we dissect the migration strategy, schema conversion challenges, data transfer methodologies, query optimizations, and post-migration performance evaluations. Our in-depth analysis will shed light on the intricacies of MySQL to PostgreSQL database migration.