You probably missed the news, but… PT-1751: Adds –where param to pt-online-schema-change This brings the possibility to perform what I would call an “inverted purge” because you are not actually purging rows from your multi-terabyte table, but rather, you copy the small percentage of rows you want to keep to a new table and then […]

We’re excited to announce that both Percona Server for MySQL and Percona XtraBackup now support the ARM64 architecture on Red Hat Enterprise Linux (RHEL) 8/9 and Oracle Linux (OL) 8/9. The packages with the aarch64.rpm extension can be found on Percona Software Downloads. The aarch64.rpm file extension indicates that the RPM package is specifically built for the ARM64 architecture and intended […]

Warning! Recently, Jean-François Gagné opened a bug on bug.mysql.com #115517; unfortunately, the bug is now private. However, the bug looks quite serious. We at Percona have performed several tests and opened the issue PS-9306 to investigate the problem. In short, what happens is that if you create a large number of tables, like 10000, the […]

For a long time, I’ve been thinking about the possibility of importing a single file with multiple connections. Why? Simply because we have scenarios where we end up importing a big file with a single loader thread. Well, I have good news: since the release of 0.16.3-1, we are able to do it. There are […]

MySQL 9.0 was released on July 1, 2024. This is an ‘Innovation’ release, which means it provides access to the latest features and improvements in MySQL technologies. Innovation releases are the opposite of the Long Term Support (LTS) releases, where stability is the top priority, and only needed security and other fixes are available. This […]

Some of our Percona Support customers report performance degradation after a major MySQL upgrade, and there can be many different reasons for this. These days, the most common major upgrade is from MySQL 5.7 (which recently reached EOL) to 8.0, and I am going to emphasize one important case that affects many database instances. Range […]

Is your MySQL database running at its best? While MySQL is known for its reliability and ease of use, ensuring top-notch performance is crucial. One way to do that is through performance monitoring, an essential practice for identifying bottlenecks, maintaining optimal speed, and guaranteeing a seamless user experience. Effective monitoring not only helps in detecting […]

Replication has been the core functionality, allowing high availability in MySQL for decades already. However, you may still encounter replication errors that keep you awake at night. One of the most common and challenging to deal with starts with: “Got fatal error 1236 from source when reading data from binary log“. This blog post is […]

Flow control is not a new term, and we have already heard it a lot of times in Percona XtraDB Cluster/Galera-based environments.  In very simple terms, it means the cluster node can’t keep up with the cluster write pace. The write rate is too high, or the nodes are oversaturated. Flow control helps avoid excessive […]

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 […]