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RAM Utilization reaches 99% When Backup Jobs are Submitted to VM

RAM utilization reaches 99% when backup jobs are submitted to VMs on Windows 2012 Hyper-V CSV.

Symptom

During backup of VMs that are part of 2012 Hyper-V cluster RAM utilization gradually increases and reaches to 99% on CSV owner Hyper-V host. As a result, Virtual Machines and Hyper-V host stop working during backup.

Solution

This issue is caused due to known bugs in the Microsoft code.

To fix this problem, download and apply hotfix provided by Microsoft on all the Hyper-V host from the following link:

https://support.microsoft.com/en-in/kb/2878635