How to enable VM memory overcommitment


The procedure for enabling VM memory overcommitment is as follows:
1. Log in to FusionCompute and choose Computing Pool.
2. Select a cluster and click Configure.
3. On the Configuration page, click Control Cluster Resource.
4. Enable host memory overcommitment.
5. Click OK.

Other related questions:
Steps for adjusting a VM's memory specifications
You can adjust a VM's memory specifications as follows: 1. On FusionCompute, click VM and Template. 2. Click the name of the target VM. 3. On the Hardware tab, click Memory. 4. Enter a memory size for the VM. 5. Set the parameters under Memory Resource Control: Quota specifies the memory weight a VM can obtain in resource contention. This defines the VM's relative priority or importance. Reserved (MB) specifies the minimum physical memory reserved for the VM. If Reserved (MB) is set to 0, the system reserves the minimum memory resources required for the VM. 6. Click OK. 7. Click OK. 8. Restart the VM.

Method used to check whether a VM's memory has been adjusted
You cannot check whether a VM's memory has been adjusted.

Method used to enable and disable the iCache function of linked clone VMs
After iCache is enabled on a VM, the system stores the frequently accessed data in iCache to increase the data access rate. The iCache configuration process is complex and the following is only a brief introduction: 1. Set an iCache value. The threshold is set during FusionCompute installation. You are advised to configure iCache and set its value to 12288 MB if you want to use linked clone VMs. 2. Enable the iCache function when you create the linked clone VM template. 3. Provision VMs using the template. The iCache function takes effect when you use the VMs. The iCache function can be disabled only after all VMs provisioned busing the template are deleted.

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