Azure HorizonDB: Microsoft Just Put Your Entire AI Stack Inside Postgres
A DBA deep dive into Azure HorizonDB: WAL-as-log architecture, AI SQL functions, BM25 full-text search, durable RAG pipelines with pg_durable,…
PostgreSQL Error Knowledge Base
PostgreSQL.
Explained
for production.
Engineers have been debugging
Common:
1+
Briefings
578+
Error codes
88+
GUC parameters
1,000+
Engineers
Built for engineers who run PostgreSQL in production
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Incident Intelligence
What's inside
500+ errors, fully decoded
Every PostgreSQL error code with symptoms, root cause, recovery steps, and prevention — traced back to the source.
88 GUC parameters explained
Every knob that matters. What it controls, safe ranges, and what breaks when you get it wrong.
171 production recipes
Copy-paste SQL, diagnostic queries, and shell commands for the problems engineers actually hit in production.
Five learning pathways
Structured curricula from connection internals to replication tuning — in the order that actually makes sense.
Built for incidents, not tutorials
Every page answers: what happened, why it happened, and exactly how to fix it.
Glossary in plain English
PostgreSQL jargon decoded without docs-speak. Know what MVCC, WAL, autovacuum, and EXPLAIN actually do.
Structured learning
Learning Pathways
01
Foundations
PostgreSQL Internals 101
MVCC, WAL, buffer cache, autovacuum. The mental model every DBA needs.
8 articles
→
02
→
Performance
Query & Index Mastery
EXPLAIN plans, index types, and patterns that compress p99 latency.
12 articles
→
03
→
Operations
Zero-Downtime Deployments
Schema migrations, ALTER TABLE patterns, and blue/green database upgrades.
7 articles
→
04
→
Advanced
Replication & HA Architecture
Streaming, logical replication, Patroni, and failover without data loss.
9 articles
→
05
→
The Engine Room
How PostgreSQL Actually Executes
Executor stages, expression evaluation, and the runtime pipeline that transforms every query plan into result rows.
12 lessons
→
→
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