So, as you’ve noticed, I’ve been playing around with MySQL Router v8.4.3 and read-write splitting, and now I’ve come across some issues that my environment has generated and I’ve opened some bugs against the fiend:

Bug 116950 – Router Read-Write splitting config causes PHP RSET_HEADER error

Bug 116951 – mysqlrouter Error parsing stats_updates_frequency errors

Bug 116952 – Router w/ RW split causes ERROR: 4501 if sql script contains comments lines (“– “)

(Yup, I prepared each bug description, repeatable tasks and suggested fix …

Interpreting the results and exit codes of your upgrade tests is essential for assessing the process’s outcome. In this blog, we’ll explore the significance of pt-upgrade return codes and how…

The post Understanding Return Codes of pt-upgrade: A quick guide first appeared on Change Is Inevitable.

This long article aims to provide you with the instructions and tools to migrate your production database from your current environment to a solution based on Percona Everest (MySQL). Nice. You decided to test Percona Everest and found that it is the tool you were looking for to manage your private DBaaS. The easiest part […]

I got quite a response to my article on whether Oracle is Killing MySQL, including a couple of great write-ups on The Register (1, 2)  on the topic.  There are a few questions in this discussion that I think are worth addressing.  AWS and other cloud vendors compete, without giving anything back, what else would […]

Some 15 years ago, when Oracle acquired Sun, and hence MySQL, there was a lot of talk on the internet over when Oracle was going to “Kill MySQL”.  Multiple theories were circled around, ranging from killing MySQL altogether, so there is less competition to proprietary Oracle, or just killing it as an open source project, […]

FOSDEM is for sure one of the most respected free and open source software-focused conferences in Europe, which is loved by many, myself included. It is from the point of love I am raising concerns about transparency, which seems to be lacking in regard to some processes at FOSDEM.For many years, as long as I […]

When working with group replication, MySQL router would be the obvious choice for the connection layer. It is tightly coupled with the rest of the technologies since it is part of the InnoDB cluster stack.The problem is that except for simple workloads, MySQL router’s performance is still not on par with other proxies like Haproxy […]

This blog was originally published in January 2021 and updated in November of 2023.As businesses and applications increasingly rely on MySQL databases to manage their critical data, ensuring data reliability and availability becomes paramount. In this age of digital information, robust backup and recovery strategies are the pillars on which the stability of applications stands. […]

Percona University Online has released a new free course, “MySQL 5.7 End of Life Options – Free Course at Percona University Online,” by Dave Stokes, Technical Evangelist at Percona. 

Dave is the author of MySQL & JSON – A Practical Programming Guide. He started to work with MySQL from the 3.29 version and was a part of the MySQL Community Team for over a decade.

MySQL 5.7 reaches its End of Life in October 2023. The Era of MySQL 5.x will be over, and only MySQL 8.0 will be officially supported. Learn how to keep your database secure and performant after that date and what real options you have if you decide to upgrade or stay on the current version. 

This course consists of eight short videos. Pass a brief quiz on Google Classroom afterward to receive a Certificate of Completion from Percona. The …

In this article, I want to discuss a couple of pretty new features in MySQL 8.0 — and an older one. Maybe these are minor features you are not aware of, and maybe not so relevant, to be honest. But it is worth providing a quick overview, showing how they work, and how they could be useful in some cases.

All refer to the invisibility of something:

• Invisible columns
• Generated invisible primary keys
• Invisible indexes

Let’s take a look.

Invisible columns

The invisible columns feature has been deployed since version 8.0.23. What is an invisible column? It’s basically a regular column of a table with its own name and data type. It is treated and updated as any other regular column, with the only difference being that it is invisible to the application. In other words, it can be accessed only in the case it is explicitly addressed in your SELECT; otherwise, it is …