Missing Performance Plus on Eligible Managed Disks
Balazs Engedi
Service Category
Storage
Cloud Provider
Azure
Service Name
Azure Managed Disks
Inefficiency Type
Misconfiguration
Explanation

For Premium SSD and Standard SSD disks 513 GiB or larger, Azure now offers the option to enable Performance Plus — unlocking higher IOPS and MBps at no extra cost. Many environments that previously required custom performance settings continue to pay for additional throughput unnecessarily. By not enabling Performance Plus on eligible disks, organizations miss a straightforward opportunity to reduce disk spend while maintaining or improving performance. The feature is opt-in and must be explicitly enabled on each qualifying disk.

Relevant Billing Model

Azure Managed Disks are billed based on:

  • Provisioned disk size (GB/month)
  • Disk type (e.g., Premium SSD, Standard SSD, Ultra)
  • Additional performance settings, if configured manually

Performance Plus allows eligible disks to receive enhanced performance without incurring additional costs, potentially replacing paid performance upgrades.

Detection
  • Identify disks ≥ 513 GiB that have manually configured additional IOPS or throughput
  • Check for disks operating near IOPS or MBps limits that are eligible for Performance Plus
  • Review whether Performance Plus has been enabled on qualifying Premium SSD or Standard SSD disks
  • Cross-reference against workloads with high sustained disk usage to prioritize impact
Remediation
  • Enable Performance Plus on all eligible disks using Azure CLI, API, or portal
  • Decommission paid performance tiers or custom throughput settings where Performance Plus provides equivalent capability
  • Incorporate Performance Plus enablement into provisioning templates for large disks going forward