The Percona Database Performance Blog

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...

Migrate from Crunchy Data PostgreSQL Operator to Percona PostgreSQL Operator: Standby Cluster Method

A Crunchy to Percona PostgreSQL migration is more straightforward than most cross-operator moves on Kubernetes, because the Percona PostgreSQL Operato...

Why Modern Finance Runs on Open Source

For decades, financial institutions have relied on proprietary databases to power everything from customer transactions to real-time risk engines. But...

MySQL 9.7.0 PGO Benchmark Analysis

Overview Servers Tested: MySQL 9.7.0 (PGO-enabled build released by Oracle) MySQL 9.7.0 Non-PGO (built without Profile-Guided Optimization — see BUILD...

CVE-2026-8053: “We don’t use time-series” is not a mitigation

TL;DR: A bug in MongoDB’s time-series collection code allows a user with the standard readWrite role to corrupt memory within the mongod process...

Manually Migrate Hash Slots in a Valkey/Redis Cluster

This article explains how to manually migrate hash slots in Valkey/Redis clusters to expand your deployment with minimal disruption to availability. N...