disk configuration alert

Mostafa 20

Hello

for some VMs I see this alert :

The configuration of this virtual machine and its attached disk(s) does not allow for the disk(s) to utilize their full throughput performance. The current virtual machine size supports 145 MBps. The total for disk(s) attached to virtual machine 'vmcac01slpmne06' is 275 MBps. You can change the virtual machine size to support additional disk(s)

Please if it's an issue how it can be fixed ?

Thank you

Keshavulu Dasari 1,730 Reputation points Microsoft Vendor

2024-09-07T02:56:14.3466667+00:00

HI Mostafa,

This warning indicates that your current virtual machine (VM) configuration does not allow the attached disks to achieve their full throughput processing capacity. In this case, the VM supports a maximum throughput of 145 MBps, but the connected disks are configured to require a total of 275 MBps.

• Increase VM Size: Select a VM size that supports the required throughput. In your case you need a large VM that supports at least 275 MBps throughput for the attached disk. I request you to please look at the attached Microsoft documentation once

1 .Virtual machine sizes overview - Azure Virtual Machines | Microsoft Learn

2. Select a disk type for Azure IaaS VMs - managed disks - Azure Virtual Machines | Microsoft Learn

3 .Overview of Azure Disk Storage - Azure Virtual Machines | Microsoft Learn

• Check disk performance: Check that the disks themselves are properly configured. Azure Premium SSDs have different performance levels, and you may need to choose a level that matches your throughput needs.

• Optimize disk IOPS: If the disks are set to performance levels that support high IOPS and throughput, ensure that the VM size you choose can handle these levels.

*** Testing**

• Run performance tests: After making changes, run performance tests to verify that the new system meets your expected throughput.

Other things to consider:

• Budget: High-performance VMs often come with higher costs. Make sure the performance improvements meet your budget.

• Application Impact: Ensure your application can benefit from increased throughput.

By increasing the VM size to match the throughput needs of your connected disk, you should be able to fix the issue and ensure that your VM can use the full processing capacity of your disk
Mostafa 20 Reputation points

2024-09-10T01:02:33.2733333+00:00

@Keshavulu Dasari

Thank you for your update

our team are are asking if keeping this warning like this will have an impact application performance ?

and other question please , is there a risk to Increase VM Size to a VM size that supports the required throughput ?

Thank you for your help

1 answer

KarishmaTiwari-MSFT 20,212 Reputation points Microsoft Employee

2024-09-18T21:22:25.2633333+00:00

@Mostafa There are a few things to keep in mind when going for increasing the VM size.

Increasing the size of a VM might require some downtime, which can impact the availability of your applications for a short duration. Also, larger VMs come with increased costs.

You can plan the resizing during off-peak hours or maintenance windows to reduce the impact on users. Deploy your VMs in availability sets or zones to ensure high availability. This way, even if one VM is down, others can continue to handle the load.
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