The latest from the MySQL community

Java Database Connectivity (JDBC) gives a Java program a standard API for opening a MySQL connection, sending SQL, and reading rows. The work starts with a compatible MySQL driver, a complete JDBC URL, and an account that can reach only the database your program needs. I compiled the example below with Maven resolving MySQL Connector/J […]

Posted on MySQL Ninjas | August 2026

Every DBA has been there. An alert fires. You SSH into the box, run free -h, and see MySQL consuming far more RAM than you configured. You double-check innodb_buffer_pool_size. It's set correctly. So where is the memory going?

This is the story of debugging exactly that — on a Google Cloud c4d-standard-4 instance with 14.7 GB RAM, MySQL configured with a 7168 MB buffer pool, and mysqld RSS sitting at 10.4 GB. That's a 3.2 GB gap nobody could explain.

The Setup

We run a large …

Homebrew gives you the shortest path to a local MySQL server on macOS, but an install command alone does not prove that the server is running or that the client can connect. I checked the Homebrew mysql formula and built this sequence around the package, service, security, and connection checks it documents. Use this route […]

Deno can use the mysql2 driver through its npm compatibility layer, so a Deno app can open a MySQL connection without reviving an older URL import. The working path is small: give the app a limited database account, read its connection values from environment variables, execute a parameterized query, then close the pool. I ran […]

What LTS, Innovation, and “latest supported” mean across MySQL Server, Shell, Router, Connectors, and Operator MySQL has two different release models, and understanding which products follow which model makes choosing versions much simpler. MySQL Server and MySQL NDB Cluster offer Long-Term Support (LTS) and Innovation releases. MySQL Shell, MySQL Router, MySQL Connectors, and MySQL Operator for Kubernetes follow a Single Releasemodel: use […]

Build a Deno API server with MySQL by keeping HTTP handling separate from database work. The handler below rejects an empty name, creates a user, and lists users, while MySQL2 owns parameterized SQL. Install Deno and prepare MySQL Install Deno with the current Deno installation instructions. Deno can import npm packages, including MySQL2, through its […]

The MySQL team would like to thank everyone in the community who contributed bug reports, patches, pull requests, and continued feedback that became part of the MySQL 26.7 release. As always, community contributions help make MySQL better for everyone. In this release, we received contributions across the MySQL Server Optimizer, Parser, Prepared Statements, Performance Schema, […]

Users can now provision a DB system with an IPv6 address when the selected subnet supports IPv6. Applications can then reach the DB system through its IPv6 primary endpoint. IPv6 connectivity, familiar MySQL Modern cloud applications increasingly use IPv6 to expand address capacity, simplify large network estates, and support long-term infrastructure modernization. Yet a single […]

1. Purpose and scope

This performance investigation aims to look into the read/write performance of Percona Server for MySQL 8.4 and how it changed between versions released in 2026:

• 8.4.8-8 released on 12 March 2026
• 8.4.10-10 released on 30 June 2026
• 8.4.11-11 released on 20 August 2026

We want to see if there are improvements in scalability and performance in OLTP read/write operations, where the improvements are most noticeable and how they were achieved. For some readers this material might help with making the decision whether upgrading to a newer version is worth the effort.

An important note is that the new features or security patches will not be taken into consideration.

Measuring Latency (Percentiles) and Resource Utilization (CPU, RAM, I/O) is not in the scope of this post.

2. Configuration and Methodology

The …

Oracle plans to move MySQL security updates toward a monthly cadence, supplementing the current quarterly Critical Patch Update (CPU) schedule. These monthly Critical Security Patch Update (CSPU) releases will be issued only when needed to address critical security or stability issues; they are not a fixed monthly release commitment. These CSPU releases will focus on […]