Planet MySQL HA Blog
The Planet MySQL HA Blog aggregates content from sources that cover topics related to high availability (HA) for MySQL databases.
Symlinks are Unsafe since MySQL 8.0.39 (and maybe even before)
You read this right, symbolic links (symlinks) are unsafe in MySQL since at least 8.0.39. As always, it is a little more complicated than that, but if you are using symbolic links and in certain conditions, you risk a crash. I think it is important to raise awareness on this, hence this post.
My attention was brought to this via the now private Bug #120156: MySQL 8.0.39/8.0.42
Monitoring MySQL data locks, or the tip of the iceberg
Monitoring MySQL data locks, or the tip of the iceberg This story is about recent (*) performance improvements implemented in MySQL, related to monitoring of data locks. (*) Originally written in Feb 2025. Refresher What is a data lock? When a user session connects to the MySQL database, it executes SQL queries. The query runs; […]
Join the Public MySQL Community Discussion Webinar (Edition #3)
Following the strong participation in the first two editions of our Public MySQL Community Discussion webinar series, we’re excited to invite you to Edition #3. These sessions are part of our ongoing commitment to increase transparency, strengthen collaboration, and make it easier for the community to provide input that helps shape the evolution of MySQL’s. […]
Celebrating 30 Years of MySQL: Free Training & Certification Results
In 2025, MySQL celebrated its 30th anniversary—and to mark the milestone, Oracle University (together with the MySQL Community team) offered free MySQL training and free certification exams from April 20 through July 31, 2025. The goal was simple: make it easy for developers, DBAs, architects, and newcomers to build practical skills and validate them with […]
Thanks AWS Open Source
I would like to thank AWS Open Source for their support.
For some time, I am maintaining Planet for the MySQL Community, a blog / news aggregator for the MySQL Community/Ecosystem. I am also maintaining a similar aggregator for the Valkey Community.
Maintaining blog / news aggregators is not free. It incurs hosting, domain registration, and other costs (in addition to time,
How to Enable MySQL HeatWave Telemetry and Analyze Logs with OCI Log Analytics
MySQL HeatWave Service on Oracle Cloud Infrastructure (OCI) provides built-in telemetry and logging capabilities that help organizations monitor database activity, troubleshoot issues, and maintain operational health. These logs are valuable not only for operations and performance tuning, but also for governance and regulatory compliance, where audit logging can be essential for tracking database activity and […]
Percona Bug Report: March 2026
At Percona, we operate on the premise that full transparency makes a product better. We strive to build the best open-source database products, but also to help you manage any issues that arise in any of the databases that we support. And, in true open-source form, report back on any issues or bugs you might encounter along the way.
Oracle Ignites AI Innovation at TEDAI San Francisco
Oracle was proud to sponsor and participate in TEDAI San Francisco, a sold-out event that brought together over 1,200 attendees from across industries to explore, debate, and celebrate the transformative potential of artificial intelligence. Through a mix of key panels, a 48-hour hackathon, and thought leadership engagement, Oracle showcased its commitment to responsible AI innovation […]
InnoDB Buffer Pool Tuning: From Rule-of-Thumb to Real Signals
Introduction Many MySQL setups begin life with a familiar incantation:
Introducing MySQL HeatWave Telemetry data with OCI Log Analytics
Announcing MySQL HeatWave Telemetry data publishing into OCI Log Analytics — the easiest way to view , analyze the MYSQL Heatwave Logs New build-in feature to publish the MySQL Logs to OCI Log Analytics Telemetry Data: The Following data will be published based on the user selection1. Error log: Contains a record of mysqld startup and shutdown […]