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Performance · Medium severity

Azure VM High Disk Throughput, Upgrade Disk Tier

The disk is at its throughput cap, so I/O is throttled and the application spends its time waiting on storage rather than doing work.

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Azureprovider
Mediumseverity
Advisorywhere it shows up
Manualfix, steps written out

Azure

Found, explained, handed over.

What we would change and why, with no savings claim and no policy behind it.

01

Detect

ZopNight checks this automatically across Azure, with read-only access to the account.

02

Explain

Every finding says exactly what to change: Upgrade the VM's disk tier.

03

Fix

The finding opens with the fix already written out, step by step, so it is one ticket, not an investigation.

Applies to
Virtual Machines on Azure
The fix, by hand
  1. Open VM → Disks; cross-reference each disk SKU with its IOPS + throughput metrics in Monitor (namespace = Disks).
  2. Identify disks on Standard HDD / Standard SSD that show sustained queue depth or throttle events.
  3. For data disks, you can change SKU online from Standard → Premium SSD or Premium SSD v2 via Disk → Size + performance.
  4. For the OS disk, stop the VM, change the SKU, then start.
  5. Validate I/O latency drops in Monitor → Metrics after the change.
  6. Premium SSD v2 is usually the better target than Premium SSD for new workloads: independent IOPS / throughput dials, no SKU jumps.

These are the steps the finding carries in the product.

Category
Performance. A measured bottleneck worth clearing: throttled operations, undersized tiers, a workload near its limit.
Where it appears
The Advisory tab of Recommendations, with every affected resource listed.
Rule ID
RC-264
Full reference

Azure VM High Disk Queue -- Upgrade Disk Tier

Related checks

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