The Percona Database Performance Blog

Security advisory: CVE-2026-9740 and CVE-2026-11933 in Percona Server for MongoDB

TL;DR: This advisory covers the two most important high-severity memory-safety vulnerabilities affecting MongoDB Community and our downstream Percona ...

Extending pt-archiver with a Partition-Aware Plug-in for Fast Retention Policy Enforcement

Managing data retention policies is one of the most common operational tasks in MySQL. Applications continuously generate transactional, audit, loggin...

Group Replication VS Percona XtraDB Cluster: The True Cost of Consistency

Overview When building high-availability MySQL environments, the choice between MySQL Group Replication (GR) and Percona XtraDB Cluster (PXC) often co...

The Failover Brownout: Rethinking High Availability in MySQL Group Replication

It is time to talk again about Flow control and group replication. This time with a special eye on the use of Group Replication in the Kubernetes cont...

Percona Operator for MySQL (PXC) 1.20.0: Automatic Storage Resizing, TLS Certificate Rotation, and ARM64 Support

Percona Operator for MySQL PXC 1.20.0 is out today, and it addresses three long-requested operational headaches: storage that grows on its own before ...

Migrating from MongoDB 6.0 to 8.0: How Percona ClusterSync Handles Cross-Version Replication

Percona ClusterSync for MongoDB (PCSM) replicates data between MongoDB clusters to keep migrations with near-zero downtime. Prior to version 0.9.0 it ...

Percona Operator for PostgreSQL 3.0.0: Hard Fork, OLM Scoping, Major Upgrades

The Percona Operator for PostgreSQL 3.0.0 is here. This is the release that completes the hard fork of the operator from the Crunchy Data PostgreSQL O...

Migrate from Crunchy Data PostgreSQL Operator to Percona PostgreSQL Operator: Backup-Restore and PV Reuse

A Percona PostgreSQL operator pgBackRest restore is the simplest way to move off the Crunchy Data PostgreSQL Operator: take a full Crunchy backup, poi...

How Procurement Leaders Realize ROI from Open Source Databases

Database purchases are often considered just another IT expense. The primary concerns are limited to license fees and sign support contracts. But this...

Running TidesDB as a MySQL 9.7 storage engine

tidesdb-mysql is an experimental build that was developed to verify how TidesDB, the LSM-tree key/value engine, can work with MySQL 9.7 as a storage e...