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This report details the background, testing methodology, encountered issues, optimization steps, migration process, and final performance outcomes of moving Weimeng's MySQL databases to Tencent Cloud CDB, providing a comprehensive case study for database engineers and cloud architects.
The article details Tencent’s TXSQL (Tencent MySQL) architecture and optimizations—including asynchronous table deletion, DDL NO_WAIT/WAIT, MDL visibility, lock splitting, parallel replication, query push‑down, read‑view enhancements, low‑overhead auditing and KMS‑integrated encryption—highlighting its role as the core engine powering CDB for diverse industries such as gaming, finance, e‑commerce and internal services like WeChat and QQ.
Tencent Cloud’s migration team successfully moved over 130 on‑premise MySQL instances totaling 20 TB to CDB by rigorously testing the migration tool, configuring master‑slave replication, handling high‑concurrency binlog sync, and resolving timestamp, stored‑procedure, and DDL issues, ensuring seamless production deployment.