Premium SSD v2 storage option in Azure Database for PostgreSQL flexible server

2025-09-12

APPLIES TO: Azure Database for PostgreSQL flexible server

Premium SSD v2 (preview)

Premium SSD v2 offers higher performance than Premium SSD, while also being less costly, as a general rule. You can individually tweak the performance (capacity, throughput, and input/output operations per second, referred to as IOPS) of Premium SSD v2 at any time. The ability to do these adjustments allow workloads to be cost-efficient, while meeting shifting performance needs. For example, a transaction-intensive database might need to cope with a large amount of IOPS for a couple of exceptionally high-demand days. Or a gaming application might demand higher throughput during peak hours only. Hence, for most general-purpose workloads, Premium SSD v2 can provide the best price for performance. You can now deploy Azure Database for PostgreSQL flexible server instances with Premium SSD v2 disk in all supported regions.

Note

Premium SSD v2 is currently in preview for Azure Database for PostgreSQL flexible server.

Differences between Premium SSD and Premium SSD v2

Unlike Premium SSD, Premium SSD v2 doesn't have dedicated sizes. You can set a Premium SSD v2 disk to any size you prefer, and make granular adjustments as per your workload requirements. Those granular increments can go in steps of 1 GiB. Premium SSD v2 doesn't support host caching, but still provide lower latency than Premium SSD. Premium SSD v2 capacities range from 1 GiB to 64 TiBs.

The following table provides a comparison of different aspect of the types of disk supported by Azure Database for PostgreSQL flexible server, to help you decide which one suits your needs better.

Premium SSD v2 - IOPS

Azure Database for PostgreSQL flexible server offers a baseline IOPS of 3000 for disks up to 399 GiB, and 12000 IOPS for disks over 400 GiB at no extra cost. To achieve 80,000 IOPS on a disk, it must be at least 160 GiB. Increasing IOPS beyond the free tier results in extra charges.

Premium SSD v2 - Throughput

Azure Database for PostgreSQL flexible server offers a baseline throughput of 125 MB/s for disks up to 399 GiB, and 500 MB/s for disks over 400 GiB at no extra cost. Increasing throughput beyond the free tier results in extra charges.