Self-Hosted PostgreSQL 17 NVMe VPS vs AWS RDS Multi-AZ: 12-Month IOPS & TCO Audit
AWS RDS charges steep premiums across four stacked dimensions: vCPU/RAM markup, Multi-AZ 2x duplication, provisioned EBS IOPS above the 3,000 baseline, and RDS Proxy per-vCPU fees. Modern NVMe VPS/VDS nodes with WAL-G + Patroni deliver higher raw 4K IOPS at ~12% of the monthly bill.
PGSizer Architecture & Public Cost Matrix for VPS-VS-RDS (2026-11-12)
Cost figures reflect published vendor rate cards retrieved 2026-11-12; promotional and renewal billing may change.
| Audit Dimension | UltaHost (VDS-RAID10-PG) | Compared Option |
|---|---|---|
| 32GB RAM + 8 vCPU + 400GB Storage | $68/mo Dedicated VDS (or $19.99 KVM 8) | ~$685 – $890/mo (RDS db.r6i.xlarge Multi-AZ) |
| Sustained 4K Random Disk IOPS | 45,000 – 110,000+ Included Local NVMe IOPS | 3,000 Baseline gp3 (Pay extra per IOPS above 3K) |
| WAL fsync Commit Latency | 0.18 – 0.45 ms (Direct PCIe Bus) | 0.95 – 2.40 ms (Network-Attached EBS Hop) |
| Connection Pooling Included | $0 PgBouncer (Unlimited Sockets) | $88+/mo Extra for AWS RDS Proxy |
| Extensions (pg_duckdb, ParadeDB, UUIDv7) | 100% Root Freedom — Any PG17 Extension | Restricted Strictly to AWS Allowlist |
PGSizer Engineering Decision Framework for VPS-VS-RDS
- Choose Hostinger KVM 4/8 ($10.49–$19.99/mo) or UltaHost 64GB VDS ($68/mo) when your engineering team is comfortable running automated Ansible/Docker + WAL-G S3 PITR and wants to save $6,000–$16,000/year.
- Keep AWS RDS only when corporate compliance mandates zero-SSH vendor-managed control planes or contractual AWS Enterprise Discount Program (EDP) spend.
- Use native PostgreSQL Logical Replication on a $300 free-credit Vultr staging node to rehearse your RDS repatriation cutover with zero production risk.
Infrastructure Options for VPS-VS-RDS Evaluated by PGSizer
UltaHost Dedicated VDS & Bare-Metal (32GB–192GB DDR5 ECC)
Zero I/O Steal Dedicated VDS & Enterprise NVMe RAID-10 for 250GB–2TB+ Postgres Clusters
Hostinger KVM NVMe VPS (AMD EPYC + PostgreSQL 17 / Docker)
Up to 67% OFF + Extra 20% Partner Discount (8GB–32GB DDR5 ECC + PCIe Gen4 NVMe)
Vultr PostgreSQL 17 & HA Replica Lab ($300 Free Credit)
$300 Free 30-Day Cloud Credit to Run pgbench, Logical Replication & PITR Drills
PGSizer Technical Q&A for VPS-VS-RDS
Why does a $20 NVMe VPS often beat a $400 RDS instance on pgbench?
AWS EBS volumes are network-attached block devices capped at 3,000 baseline IOPS unless you pay steep provisioned-IOPS fees. Local PCIe Gen4 NVMe drives sit directly on the host PCIe lanes with sub-0.3ms fsync latency.