When COMMIT is the slowest query, it means your storage is slow. Let’s look at an example.

When COMMIT is the slowest query, it means your storage is slow. Let’s look at an example.

When COMMIT is the slowest query, it means your storage is slow. Let’s look at an example.

We usually receive and see some questions regarding the charset levels in MySQL, especially after the deprecation of utf8mb3 and the new default uf8mb4. If you understand how the charset works on MySQL but have some questions regarding this change, please check out Migrating to utf8mb4: Things to Consider by Sveta Smirnova. Some of the […]

Yes, this is a catchy title, but it is true, and it got you reading this post :-).  Another title could have been “Please load this mysql-dump: what could go wrong ?”.  As you guessed, loading a dump is not a risk-free operation.  In this post, I explain how the insecure MySQL client makes this operation risky and how to protect against it.

And if you think this post is not

It’s a common scenario to have a Percona Monitoring and Management (PMM) server running on Kubernetes and also desire to monitor databases that are running outside the Kubernetes cluster. The Ingress NGINX Controller is one of the most popular choices for managing the inbound traffic to K8s. It acts as a reverse proxy and load […]

We met with Vinicius Grippa, a Senior Support Engineer at Percona. He is also active in the open source community and was recognized as a MySQL Rock Star in 2023. In the previous interview with Vinicius, we discussed the upcoming End of Life (EOL) for MySQL 5.7. Now that MySQL 5.7 has reached EOL, MySQL […]

My name is Arvind Murty, and from May to July of 2023, I worked on Vitess via an internship with PlanetScale. I was first introduced to Vitess when I was in high school as a potential open-source project for me to work on. I had been interested in working on one because they’re a relatively easy way to get some real-world experience in large-scale software development. Vitess seemed like an good place to start, so I started contributing, mostly on internal cleanup.

Not very long ago (well, maybe a little longer, this post is in draft for more than a year), in the spawn of less than 5 days, I suggested many colleagues to reproduce a problem they had with MySQL in a "more simple environment".  Such more simple environment can be created with dbdeployer.  dbdeployer is a tool to create "MySQL Sandboxes" on a Mac (laptop or desktop) or on Linux (vm,

This blog was originally published in January 2023 and was updated in April 2024. MySQL index is a data structure used to optimize the performance of database queries at the expense of additional writes and storage space to keep the index data structure up to date. It is used to quickly locate data without having […]