Microsoft has released a hotfix for when CSV block cache causes poor performance of virtual machines on Windows Server 2012 Hyper-V.
Consider the following scenario:
- You have Hyper-V virtual machines (VM) that are configured on Windows Server 2012 Hyper-V Cluster by using Scale Out File Server as the Storage Solution.
- The virtual machine .vhdx files are held in Cluster Shared Volume (CSV).
- CSV Block Cache is enabled on the volume.
In this scenario, virtual machines may experience slow performance.
A supported hotfix is available from Microsoft.