# Chris van Eijk: PostgreSQL row-level security for SaaS: what we measured

> **Key Architectural Takeaway:** Row-level security for a multi-tenant SaaS on PostgreSQL 17, result by result: what leaks, what it costs, how to set the tenant, and where each test is..

**Published:** 2026-10-12T23:15:10+00:00  
**Source:** Planet PostgreSQL  
**Category:** databases-storage  
**Canonical URL:** https://fosswire.org/news/chris-van-eijk-postgresql-row-level-security-for-saas-what-w.html  

## Executive Summary
Row-level security for a multi-tenant SaaS on PostgreSQL 17, result by result: what leaks, what it costs, how to set the tenant, and where each test is.

## Architectural & Systems Analysis
From an OLTP/OLAP systems architecture, storage tiering, and data durability perspective:

- **Zero-Vendor Lock-in Formats:** Leveraging open specifications (e.g. Parquet, Iceberg) ensures multi-engine interoperability without ingestion lock-in.
- **Vector & In-Memory Throughput:** Modern memory layouts and SIMD-accelerated execution pipelines minimize latency in real-time retrieval.
- **Distributed Resiliency:** Decoupled storage and compute layers enable elastic horizontal scaling with strict ACID guarantees.

## Impact on the Open Ecosystem
Empowers data engineers with open, self-hosted alternatives to monopolistic cloud database providers.