I recently had the chance to read in preview Bill Karwin‘s new book: SQL Antipatterns, Volume 1: Avoiding the Pitfalls of Database Programming. This book is a rework of Bill’s best seller from 2010. The new book can be considered as the second edition and is updated with Bill’s latest observations about common mistakes. The […]

Overview

HAProxy, ProxySQL, MySQL Router (AKA MySQL Proxy), in the last few years I had to answer multiple times on what proxy to use and in what scenario. When designing an architecture there are many components that need to be considered before deciding what is the best solution.

When deciding what to pick, there are many things to consider like where the proxy needs to be, if it “just” needs to redirect the connections or if more features need to be in, like caching, filtering, or if it needs to be integrated with some MySQL embedded automation.

Given that, there never was a single straight answer, instead an analysis needs to be done. Only after a better understanding of the environment, the needs and the evolution that the platform needs to achieve is it possible to decide what will be the better choice.

However recently we have seen an increase in usage of MySQL on Kubernetes, especially with the …

Overview

HAProxy, ProxySQL, MySQL Router (AKA MySQL Proxy), in the last few years I had to answer multiple times on what proxy to use and in what scenario. When designing an architecture there are many components that need to be considered before deciding what is the best solution.

When deciding what to pick, there are many things to consider like where the proxy needs to be, if it “just” needs to redirect the connections or if more features need to be in, like caching, filtering, or if it needs to be integrated with some MySQL embedded automation.

Given that, there never was a single straight answer, instead an analysis needs to be done. Only after a better understanding of the environment, the needs and the evolution that the platform needs to achieve is it possible to decide what will be the better choice.

However recently we have seen an increase in usage of MySQL on Kubernetes, especially with the …

2022 was an exciting year for Percona Monitoring and Management (PMM). We’ve added and improved many features, including Alerting and Backup Management. These updates are designed to keep databases running at peak performance and simplify database operations. But as companies grow and see more demand for their databases, we need to ensure that PMM also remains scalable so you don’t need to worry about its performance while tending to the rest of your environment.

PMM2 uses VictoriaMetrics (VM) as its metrics storage engine. Percona’s co-Founder Peter Zaitsev wrote a detailed post about migration from Prometheus to VictoriaMetrics, One of the most significant differences in …

Let’s look at how you can run Percona databases on Kubernetes, the easy way.

Chances are that if you are using the latest Percona Monitoring and Management (PMM) version, you have seen the availability of the new Percona Database as a Service (DBaaS). If not, go and get a glimpse of the fantastic feature with our docs on DBaaS – Percona Monitoring and Management.

Now, if you like it and wanna give it a try! (Yay!), but you don’t wanna deal with Kubernetes, (nay)o worries; we have a tool for you. Introducing the Percona DBaaS Infrastructure Creator, or Percona My Database as a Service (MyDBaaS).

My Database as a Service

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MySQL 8.0.32 came out recently and had some important bugfixes contributed by Perconians. Here is a brief overview of the work done.

Inconsistent data and GTIDs with mysqldump

Marcelo Altmann (Senior Software Engineer) fixed the bug when data and GTIDs backed up by mysqldump were inconsistent. It happened when the options –single-transaction and –set-gtid-purged=ON were both used because GTIDs on the server could have already increased between the start of the transaction by mysqldump and the fetching of GTID_EXECUTED. Marcelo developed a patch, and it was partially included in the release. Now, in MySQL 8.0.32, a FLUSH TABLES WITH READ LOCK is performed before fetching GTID_EXECUTED, to ensure its value is consistent with the snapshot taken by mysqldump. However, Percona Server for MySQL includes the entire patch, which does not require FLUSH TABLE WITH READ LOCK to work.

Marcelo also corrected the issue when the …

When we need to upgrade from MySQL 5.7 to MySQL 8, we could choose to do an in-place upgrade or set up another MySQL 8 server(s) from the existing running MySQL 5.7 replica.

This article will explain how to set up MySQL 8 as a replica from an existing MySQL 5.7 server with Percona XtraBackup.

In my lab, we have two test nodes:

PRIMARY:  mysql57 (192.168.56.111)    with   Percona Server 5.7 and  xtrabackup 2.4 installed
REPLICA:  mysql8    (192.168.56.113)   with  Percona Server 8  and   xtrabackup 8.0 installed

0. Pre-flight check with MySQL upgrade checker utility

Let’s run the MySQL upgrade checker utility to verify whether MySQL 5.7 server instances are ready for an upgrade.

MySQL  localhost  JS > util.checkForServerUpgrade('root@localhost:3306', {"password":"####", …

Today, the book I would like to recommend is Efficient MySQL Performance – Best Practices and Techniques, Daniel Nichter, O’Reilly, 2021. Best Practices and Techniques is a comprehensive guide to optimizing the performance of MySQL databases. Whether you’re a developer, database administrator, or system administrator, this book can provide valuable insights and techniques to help […]

If you are a mobile app, frontend, backend, or game developer, you use data types such as string, numeric, or DateTime. You also know that since the advent of non-relational databases (NoSQL) such as MongoDB, which, by not being tied to a traditional SQL schema, do reading and writing on databases much faster. But MySQL showed that storing the JSON (JavaScript Object Notation) data type could also improve the speed of reading and writing relational databases.

This post will explore the JSON Data type in Percona Server for MySQL.

One of the key features of Percona Server is support for JSON data type, which allows for the storage of JSON documents within MySQL. It allows for more flexible and efficient storage of semi-structured data (​​which is more …

For a long time, I never encountered any system using FEDERATED tables. But recently, there seems to be more interest for FEDERATED tables. Is this related to the increase of microservices? In a microservices architecture, services are typically designed to be small, loosely coupled, and independently deployable. Each service may have its own database, which […]