The latest from the MySQL community

Is your MySQL database running at its best? While MySQL is known for its reliability and ease of use, ensuring top-notch performance is crucial. One way to do that is through performance monitoring, an essential practice for identifying bottlenecks, maintaining optimal speed, and guaranteeing a seamless user experience. Effective monitoring not only helps in detecting […]

Replication has been the core functionality, allowing high availability in MySQL for decades already. However, you may still encounter replication errors that keep you awake at night. One of the most common and challenging to deal with starts with: “Got fatal error 1236 from source when reading data from binary log“. This blog post is […]

Flow control is not a new term, and we have already heard it a lot of times in Percona XtraDB Cluster/Galera-based environments.  In very simple terms, it means the cluster node can’t keep up with the cluster write pace. The write rate is too high, or the nodes are oversaturated. Flow control helps avoid excessive […]

Yesterday I detailed an incompatible breakage with RDS MySQL Aurora 3.06.0 , and one option stated is to upgrade to the just released 3.07.0. Turns out that does not work. It is not possible to upgrade any version of AWS RDS MySQL Aurora 3.

Yesterday I detailed an incompatible breakage with RDS MySQL Aurora 3.06.0 , and one option stated is to upgrade to the just released 3.07.0. Turns out that does not work. It is not possible to upgrade any version of AWS RDS MySQL Aurora 3.

Have you ever struggled to manage a large set of users and their authentication credentials in MySQL? Wouldn’t it be great if I could tell you that now you can outsource this to your favorite external identity provider? Yes, you read that right. Lets see how to do it with MySQL… With MySQL 9.1 we […]

I vividly remember 2004 when I decided to specialize in MySQL because the year before I was homeless and living in my car. It’s been a long road and an amazing journey ever since.

A relational database is more than a data bank, it’s a profound philosophical expression. This is the second and final part of “Lessons From 20 Years Hacking MySQL”.

Yes, you read this correctly: because the MySQL client is insecure and allows running arbitrary commands, and because mysqldump blindly trusts the server it is dumping from, a hostile MySQL Server on which mysqldump is executed could trigger arbitrary command execution (also known as a remote code execution).  This post raises awareness on this vulnerability and shows how a secure MySQL

We know that SQL statement compatibility can change with major database version upgrades and that you should adequately test for them. But what about minor version upgrades?

It is dangerous to assume that your existing SQL statements work with a minor update, especially when using an augmented version of an open-source database such as a cloud provider that may not be as transparent about all changes.

While I have always found reading the release notes an important step in architectural principles over the decades, many organizations skip over this principle and get caught off guard when there are no dedicated DBAs and architects in the engineering workforce.

Real-world examples of minor version upgrade issues

Here are two real-world situations common in the AWS RDS ecosystem using MySQL.

1. You are an organization that uses RDS Aurora MySQL for its production systems, and you upgrade one minor version …