MySQL databases serve as the foundation of countless applications, powering everything from simple blogs to massive enterprise platforms. But as these applications evolve and user bases expand, MySQL performance issues tend to pop up and ensuring smooth database performance becomes crucial. Fast queries mean happy users, while sluggish performance can lead to frustration and lost […]

In this blog, we will look at the differences between LTS (Long Term Stable) versions of Percona Server for MySQL. Released in April 2019, MySQL 8.0 represented a major change from the previous version, 5.7, introducing significant changes to the data dictionary and enabling many features and enhancements. It also provided no direct downgrade path, […]

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 […]

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 […]

As we know, Orchestrator is a MySQL high availability and replication management tool that aids in managing farms of MySQL servers. In this blog post, we discuss how to make the Orchestrator (which manages MySQL) itself fault-tolerant and highly available. When considering HA for the Orchestrator one of the popular choices will be using the Raft consensus. […]

You know about MySQL; we know about MySQL. After all, it’s been the most popular database system for years now. And now that we have that out of the way, on to the more important stuff! Because MySQL is so popular, you might be considering migrating your database to MySQL Community Edition or MySQL Enterprise. […]

This post was originally published in June 2020 and was updated in February 2025. While there is no magic bullet for MySQL performance tuning, there are a few areas that can be focused on upfront that can dramatically improve the performance of your MySQL installation. While much information has been published on this topic over […]

Large tables can pose challenges for many operations when working with a database. Occasionally, we may need to modify the table definition. Since RDS replication does not use asynchronous for its replication, the typical switchover procedure is not feasible. However, the Blue/Green feature of RDS utilizes asynchronous replication, which allows us to update the table […]

What index will be used when you count all rows in a table? Well, the MySQL documentation provides a straightforward answer to this, quoting: InnoDB processes SELECT COUNT(*) statements by traversing the smallest available secondary index unless an index or optimizer hint directs the optimizer to use a different index. If a secondary index is […]