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The Percona Database Performance Blog

Technical guides, deep dives, and perspectives across MySQL, PostgreSQL, MongoDB, Valkey, Redis, and more.

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September 21, 2026

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Catalin Besleaga

DISTANCE() and VECTOR_DISTANCE(): Vector Similarity in Percona Server for MySQL 9.7

TL;DR Percona Server for MySQL 9.7.2-2 now supports DISTANCE() for vector similarity scoring directly in SQL (COSINE, EUCLIDEAN, MANHATTAN, DOT metric...

Evaluating LLM models for DBA tasks

Group Replication Beyond a Single Cluster: DC-DR with Percona (PS MySQL) Operator

Percona Operator for PostgreSQL 3.1.0: Transparent Data Encryption, Logical Replicas, and Persistent Logging

Meet pgstef: Why Stefan Fercot Joined Percona, and Why You Should Find Him at Percona Live Amsterdam

Far
Enough.

Said no pioneer ever.

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The Percona Database Performance Blog

Evaluating LLM models for DBA tasks

Group Replication Beyond a Single Cluster: DC-DR with Percona (PS MySQL) Operator

Too many GCache Page Files in MySQL Data Directory

pgBackRest Compression: How Much CPU Is a Smaller Backup Worth?

Performance improvements in Percona Server 8.4.11-11

Percona and HexaCluster: Faster, Safer Oracle Migration

Enabling TLS in PXC without Downtime

Percona Operator for PostgreSQL 3.1.0: Transparent Data Encryption, Logical Replicas, and Persistent Logging

Meet pgstef: Why Stefan Fercot Joined Percona, and Why You Should Find Him at Percona Live Amsterdam

Far Enough.

Far
Enough.