Best of MySQL — September 2025

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   Video

   Kiki's Bytes·37w

   How Uber Saved $6,000,000 in Database Costs

   Uber reduced database costs by $6 million annually by migrating their financial transaction system from DynamoDB to DocStore, their custom MySQL-based distributed database. The migration involved building LedgerStore 2.0 with immutable records, data integrity guarantees, and solving hot partition problems through deterministic sharding. The process included careful data backfilling, shadow writes for real-time sync, and dual read validation to ensure zero downtime during the transition.

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   Article

   Dev Tools·36w

   Free Valentina Studio 16 now available

   Valentina Studio 16 has been released as a free database management tool supporting major databases including PostgreSQL, MongoDB, MySQL/MariaDB, MS SQL Server, SQLite, DuckDB, and ValentinaDB. The PRO version includes advanced diagramming, reporting, and forms creation capabilities similar to MS Access or FileMaker. A 5-connection version of Valentina Server 16 is also available for free.

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   Article

   PlanetScale·35w

   Postgres High Availability with CDC — PlanetScale

   Postgres high availability faces operational challenges when using Change Data Capture (CDC) due to logical replication slots being primary-local objects that can prevent failover. When CDC clients lag or poll infrequently, standby replicas may become ineligible for promotion, forcing administrators to choose between waiting for CDC advancement or breaking the CDC stream. MySQL's GTID-based approach avoids this coupling by embedding replication progress in the binary log itself, allowing seamless failover regardless of CDC client behavior.

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