This blog was originally published in June 2020 and was updated in March 2025. One of the most common support tickets we get at Percona is the infamous “database is running slower” ticket.  While this can be caused by a multitude of factors, it is more often than not caused by a bad or slow […]

As promised, my slides from FOSDEM25 and Pre-FOSDEM MySQL Belgian Days :

• MySQL Scalability & Systems Evaluation Overview 2025 [PDF]
• Profiling MySQL Memory & CPU Usage Directly From MySQL [PDF}

And since I was asked several times about MySQL test case demonstrating glibc-malloc memory fragmentation / leaks -- here are all the details :

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Learn about MySQL reserved words, their impact on database design, and how to avoid common errors. Find practical tips, examples, and resources for managing reserved words effectively.

The post MySQL Reserved Words: What You Need to Know  appeared first on Devart Blog.

MySQL Shell is a powerful tool for managing MySQL databases, and one of its most exciting features is the ability to extend its functionality using plugins. If you're a Python developer, you can create custom plugins to automate tasks, add new commands, or
integrate MySQL Shell with other tools. However debugging the python code could be cumbersome for mysql-shell given the python code requires some specific objects available only when running inside the shell. 

In this blog post, we'll walk you through the steps to set up your development environment for creating MySQL Shell plugins in Python while able to modify and debug the mysql-shell itself.

Prerequisites

Before we dive into the setup, ensure you have the following installed on your system:

• MySQL Shell: Download and install MySQL Shell from the official MySQL website.
• Python 3.8 or later: MySQL Shell plugins …

The internet has changed to a place where most protocols like HTTP etc now use secure connections with TLS by default.

While both HTTP and the MySQL Protocol use TLS for secure connections there are still many differences which make it difficult for MySQL to benefit from the same advancements as HTTP has seen in the last so many years.

What is TLS?

TLS stands for Transport Layer Security and is the successor of SSL (Socket Layer Security). SSL and TLS are often used interchangably, while this isn’t correct strictly speaking. What TLS provides is a standardized way to encrypt in transit traffic and authenticate the other end of the connection. TLS when used together with HTTP is known as HTTPS, for secure HTTP.

How TLS works in HTTPS

The client (webbrowser) connects to a server on port 443. Then negitiation is done to agree on what encryption method is to be used. The server presents the client with a …

Typically, we receive customer tickets regarding crashes or bugs, where we request a core dump to analyze and identify the root cause or understand the unexpected behavior. To read the core dumps, we also request the linked libraries used by the server’s MySQL. However, there’s a more efficient way to achieve our goal: by using […]

I have been working on MyDumper for over three years now, and I usually don’t use the tax-consistency-only feature during backups because it wasn’t an option I quite understood. So, when reviewing another issue, I stepped into a curious scenario, and I finally got it and decided to share with you what I learned and when it should […]

The MySQL Rockstars 2024 award ceremony was a highlight of the MySQL Belgian Days 2025, held on January 30th and 31st at the ICAB Incubator in Brussels. This event brought together MySQL enthusiasts from around the globe to celebrate MySQL’s 30th anniversary and honor individuals who have made significant contributions to the MySQL community. The […]

The preFOSDEM MySQL Belgian Days 2025, held on January 30th and 31st at the ICAB Incubator in Brussels, was a remarkable gathering of MySQL enthusiasts, developers, and experts. This year’s event was particularly special as it marked the commencement of celebrations for MySQL’s 30th anniversary. The event was very popular, and with more than 150 […]

This is a follow-up for MySQL GTID tags and binlog events, but you don’t need to read that first.

One of the recent innovations in MySQL was the addition of Tagged GTID’s. These tagged GTID’s take the format of <uuid>:<tag>:<transaction_id>.

And this change means that the GTID_LOG_EVENT’s in the binary logs needed to be changed. The MySQL team at Oracle decided to not change the existing format, but introduce a new event: GTID_TAGGED_LOG_EVENT.

Initially I assumed that decoding the new event would me mostly identical to the original event, but with just a single field added. But this isn’t the case as Oracle MySQL deciced to use a new serialization format (Yes, more innovation) and use it for this new event. The new serialization format is documented …