The Percona Database Performance Blog

Mongorewind: Rewind Your MongoDB Test Data Without Restoring a Backup

Mongorewind: Rewind Your MongoDB Test Data Without Restoring a Backup One day, my friend Martín told me about a problem he and his team were dealing w...

OpenID Connect Authentication for MySQL, Now Fully Open Source

Percona Server for MySQL now ships with a fully open source OpenID Connect (OIDC) authentication plugin, available starting with Percona Server for My...

Rotating Expiring X.509 Certificates in Percona Server for MongoDB with Minimal Service Interruption

Expired TLS certificates can prevent new client connections and, when X.509 is used for Percona Server for MongoDB internal authentication, also preve...

Benchmarking vector indexes

Nearly every database has vector search now, and every one of them has a blog post with a big number in it. Almost none of those numbers can be checke...

Performance Progression of Percona Server for MySQL 8.4

1. Purpose and scope This performance investigation aims to look into the read/write performance of Percona Server for MySQL 8.4 and how it changed be...

Navigating the Walled Gardens of PostgreSQL: Hidden Risks of Postgres Vendor Lock-in

These days there’s been a lot of talk about Postgres having an impact on “everything”. Whether it’s replacing legacy systems, ...

Replication Lag on AWS FSx: The Hidden EC2 Single-Flow Bandwidth Limit

A recent case in our Percona Support team started with a familiar complaint. A PostgreSQL standby lagging behind its primary. Although the problem was...

Software Bill of Materials in Percona Server for MongoDB

Introduction A software bill of materials (SBOM) offers end users enhanced supply chain visibility, thereby facilitating license compliance and timely...

Security Advisory: Privileged ClickHouse access through the Grafana data source in PMM

Date of release: 19 August 2026 Severity: High Affected product: PMM Impacted versions: 3.9.0 and below Summary Percona has recently been made aware o...

Stop guessing at gcache: inspect Galera/PXC write sets with gcache-inspector

The common practice is to size the Galera Cache based on write volume measured during peak load, but often it is more of a guesswork. The writeset cac...