Update, July 1, 2026: Percona Server for MySQL 8.4.10-10 is now available. It carries the content originally planned for 8.4.9 plus the upstream security fixes. See the 8.4.10-10 release notes. 9.7.1 is still on the way; we’ll link its release notes here when it ships.

Upstream MySQL published an out-of-schedule release this week with two high-severity CVE fixes. We’ve pulled those fixes into our next builds and are skipping the two versions we had already queued: Percona Server for MySQL 8.4.9 and 9.7.0.

These fixes arrived through Oracle’s new monthly Critical Security Patch Updates (CSPUs), which Oracle announced begin May 28, 2026. CSPUs ship targeted …

Having a separate DR cluster for production databases is a modern day requirement or necessity for tech and other related businesses that rely heavily on their database systems. Setting up such a [DC -> DR] topology for Percona XtraDB Cluster (PXC), which is a virtually- synchronous cluster, can be a bit challenging in a complex Kubernetes environment.

Here, Percona Operator for MySQL comes in handy, with a minimal number of steps to configure such a topology, which ensures a remote side backup or a disaster recovery solution.

So without taking much time, let’s see how the overall setup and configurations look from a practical standpoint.

PXC Cross-Site/Disaster Recovery

DC Configuration

1) Here we have a three-node PXC cluster running on the DC side.

shell> kubectl get pods -n pxc
NAME                                               READY   STATUS …

Remember when Percona significantly improved query processing time by fixing the optimizer bug? I have described all the details in More Performant Query Processing in Percona Server for MySQL blog post. This time, we dug deeper into all the ideas from Enhanced for MySQL and based on our analysis, we proposed several new improvements. All the changes are available in Percona Server 8.0.43 and 8.4.6, and newer versions

Before discussing specific improvements, let me describe how we measured the kind of performance gain we achieved. The top-level approach is common for benchmarks: you need a baseline version and then compare your modified version to that baseline. At Percona, we have a dedicated environment for performance testing. …

For decades, we’ve accepted a painful compromise: if you wanted logic inside the database, you had to write SQL/PSM (Persistent Stored Modules). It’s clunky, hard to debug, and declarative by nature, making it terrible for algorithmic tasks. That ends with Percona Server 8.4.7-7. We are introducing JS Stored Programs as a Tech Preview. Unlike Oracle’s […]

Data masking lets you hide sensitive fields (emails, credit-card numbers, job titles, etc.) while keeping data realistic for reporting, support, or testing. It is particularly useful when you collaborate with external entities and need to share your data for development reasons. You also need to protect your data and keep your customers’ privacy safe. Last […]

Right now, you’re probably hoping someone else will deal with this MySQL 8.0 end-of-life situation. Maybe your team can squeeze another few months out of it. Maybe Oracle will extend support. Maybe it won’t be as bad as everyone says. We get it.  You’ve got enough things going on without adding “major database upgrade” to […]

TL;DR Percona Server for MySQL now offers experimental support for stored programs in the JS language. This free and open source alternative to Oracle’s Enterprise/Cloud-only feature enables users to write stored programs in a more modern, convenient, and often more familiar language. It is still in active development, and we would very much like your […]

In this blog post, we will describe typical usage scenarios for dictionary operations in the Data Masking Component, which is available in Percona Server for MySQL as an open source alternative to Oracle’s enterprise version. In particular, we will consider the following functions. gen_dictionary() – a function that returns a random term from a dictionary. gen_blocklist() – […]

In Percona Server for MySQL 8.0.41 / 8.4.4, we significantly re-designed the Data Masking Component. In particular, we made the following changes: Changed the user on behalf of whom we execute internal queries for dictionary operations. Introduced an in-memory dictionary term cache that allows significant speed-up of dictionary operations. Introduced masking_dictionaries_flush() User Defined Function. Introduced […]

In Percona Server for MySQL 8.0.41 / 8.4.4, we introduced several improvements in Encryption User-Defined Functions. Added support for RSAES-OAEP (OAEP) padding for RSA encrypt / decrypt operations. Added support for RSASSA-PSS (PSS) padding for RSA sign / verify operations. Added new encryption_udf.legacy_padding_scheme component system variable. Normalized character set support for all Encryption UDFs. PKCS1 […]