Eliminating the Cloud IOPS & Data Egress Tax: OCI vs. AWS gp3/io2 & Azure Ultra

1. Why Database Storage Costs More Than Compute on AWS and Azure

When migrating high-throughput Oracle, SQL Server, or PostgreSQL databases to AWS or Azure, architects quickly discover that baseline disks (`gp3` 3,000 IOPS or Azure Standard SSD) choke under production OLTP checkpoint and redo-log bursts.

Upgrading a 2 TB volume to 64,000 IOPS and 1,000 MB/s on AWS `io2` or Azure Ultra Disk adds $1,500 to $3,800 per month per volume in provisioned IOPS fees alone, even during off-peak hours when the database is idle.

2. Dynamic Volume Performance Units (VPUs) on OCI

OCI Block Volumes use a single unified NVMe storage fabric across the entire region. At the default Balanced tier (10 VPUs), a 1 TB volume delivers 25,000 IOPS and 480 MB/s for just ~$42.50/month total ($0.0255/GB + $0.017/VPU-GB).

Better still, OCI allows online dynamic VPU auto-tuning via API or schedule: you can run at Lower Cost (0 VPUs, $0.0255/GB) overnight, scale to Higher Performance (20 VPUs, 50,000 IOPS) during business hours, and burst to Ultra High Performance (up to 300,000 IOPS) during month-end batch closes with zero downtime.

3. The 10 TB/Month Free Outbound Egress Advantage

AWS, Azure, and GCP charge $0.085 to $0.12 per GB after the first 100 GB of outbound internet traffic. Moving 10 TB/month of API responses, PDF reports, or media payloads out of AWS costs ~$900/month ($10,800/year). On OCI, the first 10 TB every month is $0.00, and traffic above 10 TB is billed at $0.0085/GB (10x cheaper than AWS).