The Percona Database Performance Blog

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...

Percona University Comes to Uruguay

Percona University is coming to Montevideo. On September 23rd, 2026, we’re getting together for a full day of technical talks on open source sof...

Replicating from InnoDB into a DuckDB storage engine

Our first post showed MySQL 9.7 with one change: mark a table ENGINE=DuckDB and its analytical queries run in DuckDB instead of InnoDB. The question w...

Percona for MongoDB: RHEL 10, Its Derivatives, and Debian 13 – On Both x86_64 and ARM

We’re happy to announce that Percona Server for MongoDB (PSMDB) 8.0.28-12 extends platform support to RHEL 10 and its derivatives (Oracle Linux ...

The open way of Percona Search for MongoDB

Percona Search for MongoDB is Percona’s downstream distribution of mongot, the search engine that provides MongoDB’s full-text and vector ...

The DuckDB MySQL engine at 500 GB

We ran DuckDB MySQL storage engine at scale factor 500. It is around 500 GB of raw TPC-H, three billion lineitem rows  on an 80-core server with 187 G...

The diagnostic data MongoDB Atlas doesn’t hand you

The diagnostic data MongoDB Atlas doesn’t hand you Every MongoDB server keeps a flight recorder. It’s called FTDC, Full Time Diagnostic Da...

Stored Procedures memory consumption in Percona Server for MySQL

1. What it is about This investigation began as a performance comparison for different memory allocators. However, during benchmarking, I discovered u...

Percona Server for MongoDB 8.3 Technical Preview Is Now Available

Percona Server for MongoDB 8.3 is available today as a Technical Preview. It is not for production. It is for your lab, your staging cluster, and your...