PostgreSQL 18 beta 1 (พ.ค. 2025): AIO เร็ว 2-3x + UUIDv7 + OAuth Login
PostgreSQL 18 beta 1 เพิ่ม async I/O (io_uring) B-tree skip scan GIN parallel build UUIDv7 OAuth 2.0 pg_upgrade เร็วขึ้น EXPLAIN ANALYZE ละเอียด Data checksums default

PostgreSQL 18 vs 17 Performance

ฟีเจอร์	PG 17	PG 18 beta 1
I/O	Sync	AIO 2-3x เร็ว
B-tree	Basic	Skip scan OR/IN
GIN	Sequential	Parallel build
UUID	v1/v4	v7 timestamp
Auth	SCRAM	OAuth 2.0

ฟีเจอร์เด่น (ใช้งานจริง)

1. Async I/O (io_uring)

-- Sequential scan เร็ว 3x
SELECT * FROM logs WHERE date > '2025-01-01';
-- Vacuum เร็ว 2x (maintenance)
VACUUM ANALYZE large_table;

2. B-tree Skip Scan

-- PG17: Full scan | PG18: Skip scan
SELECT * FROM users WHERE last_name LIKE 'K%' AND first_name = 'Somchai';

3. UUIDv7 (Time-ordered)

-- เรียงตามเวลา auto (index friendly)
INSERT INTO orders (id) VALUES (uuidv7());
SELECT * FROM orders ORDER BY id DESC LIMIT 10;

4. OAuth 2.0 Login

# pg_hba.conf
host all all 0.0.0.0/0 oauth oidc_provider=google

pg_upgrade ใหม่ (เร็วกว่าเดิม)

✅ Parallel processing
✅ Swap directories (no copy)
✅ Query stats preserved
✅ Downtime ลด 80%

EXPLAIN ANALYZE ละเอียด

EXPLAIN (ANALYZE, BUFFERS, CPU, WAL) 
SELECT * FROM sales WHERE date >= '2025-01-01';

Output:

Buffers: shared hit=50000 read=1000
CPU: 0.25s | WAL: 2MB | I/O: 150ms

Setup Beta 1 (Docker)

docker run -d \
  -p 5432:5432 \
  -e POSTGRES_PASSWORD=pass \
  --name pg18 \
  postgres:18-beta1
# Checksums default ON
docker exec pg18 pg_controldata | grep checksum

Production Checklist

☑️ Test AIO (io_uring kernel 5.1+)
☑️ B-tree skip scan workloads
☑️ GIN JSONB indexes
☑️ OAuth integration
☑️ pg_upgrade dry-run
☑️ EXPLAIN ANALYZE new stats

Migration Guide

1. pg_dumpall → Logical backup
2. pg_upgrade --check
3. Parallel upgrade (8 workers)
4. Query stats preserved
5. Test UUIDv7 indexes
6. Switchover (downtime <5min)

Thai Workloads เหมาะมาก

📊 E-commerce: Order timeline (UUIDv7)
🏪 POS: High TPS (AIO)
📈 Analytics: GIN JSONB search
🏠 Home lab: OAuth Google login

Stable Release

Beta 1: พ.ค. 2025
RC1: ส.ค. 2025  
Stable: ก.ย.-ต.ค. 2025

PostgreSQL 18 beta 1: AIO 3x B-tree Skip Scan UUIDv7 OAuth pg_upgrade 80% Faster