The latest from the MySQL community

Percona Toolkit’s pt-online-schema-change (pt-osc) has long been the preferred solution for performing online schema changes with minimal downtime. Its chunk-based copy algorithm is designed to adapt dynamically to the workload, making it suitable for very large tables in production environments.

However, under specific conditions, one of its optimization mechanisms can become counterproductive.

During a customer engagement involving Percona XtraDB Cluster (PXC), we investigated a case where running pt-online-schema-change with a selective –where clause caused severe Galera Flow Control and general overhead, effectively stalling the cluster for an extended period. The issue was not caused by the schema change itself, but by the interaction between:

• adaptive chunk auto-resizing
• highly selective copying of the newest rows
• clustered replication in Galera
• InnoDB …

MySQL 26.7 Innovation Support Lands

September 22, 2026 · ⁠GitHub Release

MySQL just changed the rules.

With MySQL 26.7, Oracle has moved to a new calendar-based versioning model for Innovation releases. For MyVector, that means one thing:

We need to keep up.

MyVector v1.26.9 adds MySQL 26.7 Innovation support, but the more interesting story is what happened beneath the surface.

This release puts the Component architecture introduced in v1.26.5 through a much more serious test.

From architecture to reliability

When we introduced the MySQL Component architecture in v1.26.5, the goal was straightforward: build MyVector in the direction MySQL itself is taking.

Now we are testing what happens when things don’t go perfectly.

…

This post collects the main things Marco Tusa covered in his keynote at Percona Live 2026 in Amsterdam: where Percona stands on MySQL, which features landed in the server, and what holds the MySQL community together.

Watch it here: “I Was Going to Show You a Roadmap”, about 18 minutes.

Start with the community, because the rest of it follows from there. In 2011, after the Sun and Oracle acquisitions, O’Reilly stopped the MySQL Conference, and Percona kept a conference going when nobody knew what came next. The community scattered again more recently, and Peter Zaitsev and others regrouped it in the OurSQL Foundation. MySQL, MariaDB, and Percona ship competing solutions. The people running and building them are one community, with one shared interest: this environment stays usable and open. …

The MySQL 26.10.0 Early Access Release is now available, giving developers and database teams an early opportunity to preview, evaluate, and provide feedback on the next evolution of MySQL. Early Access releases are where curiosity becomes contribution. Whether you’re testing an application stack, validating upgrade plans, or simply eager to see what’s coming, this is […]

AI database governance can get overlooked when teams rush to connect AI tools to production data. IBM’s 2025 research found that 97% of organizations that reported a breach involving an AI model or application lacked proper AI access controls. The risk is easy to see. Give an AI agent too much access and it can […]

The post Database governance in the AI era: Framework, risks and best practices appeared first on Devart Blog.

Create a MySQL database from Node.js with one query. The trick is connecting without naming a database first, running CREATE DATABASE IF NOT EXISTS, then verifying the schema exists. Here is how to do it with mysql2 and handle the failures you will hit in production. The SQL you need IF NOT EXISTS is the […]

The Model Context Protocol (MCP) has become a standard way for AI agents to discover the tools an application, database, or service offers. Claude Code, Codex, Cursor, Antigravity, et al. can connect to an MCP server, ask it what tools are available, and call these tools instead of figuring out what they can or can't do on the fly or piecing together API calls. Setting up an MCP server for a database usually means running a separate process that holds a database credential and turns tool calls into queries. Then you have another process to deploy, another place a credential lives, and a set of guardrails that sit outside the database.

The vsql-mcp extension from VillageSQL takes a different approach. It puts the MCP server inside the database. Install it, set a handful of global variables, and your MySQL server itself serves MCP over Streamable HTTP from a background …

The MySQL Community conversation continues this fall with two opportunities to connect, share feedback, and help shape the future of MySQL.  Following the recent Contributor Summits and Public Discussions, we are continuing to expand practical ways for users, developers, DBAs, partners, and contributors to participate in technical discussions, share ideas, and collaborate more openly across the MySQL […]

In our recent Where can you find MySQL from August through October 2026?, we shared a broad view of MySQL conferences, community activities, and user group meetups. Since then, community gatherings in Denver, Taipei, and Nashville have brought MySQL users, developers, and contributors together for technical discussion and local connection. We are continuing that momentum […]

EmergencyReparentShard operations are being hardened in upcoming release v25. In this blog, we cover how ERS works and the upcoming changes that make recovery safer, faster and less brittle What is EmergencyReparentShard? # EmergencyReparentShard (ERS) is the Vitess failover process used when a shard's current primary is dead or unreachable. While PlannedReparentShard gets a clean handoff from a healthy primary, ERS has to pick a replacement using only surviving tablets. It compares their transaction histories, promotes an eligible replacement, updates the topology and points the other tablets at the new primary.