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Home > Success Center > Network Configuration Manager (NCM) > NCM 7.7 Administrator Guide > Syslog messages monitoring > Change the resource allocation of a virtual machine

Change the resource allocation of a virtual machine

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Created by Caroline Juszczak, last modified by Magdalena.Markova on Jan 03, 2017

Views: 328 Votes: 0 Revisions: 5

Updated: 12-1-2016

If a virtual machine is experiencing performance issues, you can have an alert trigger a specified allocation of resources. This alert management action is available if the integration with Virtualization Manager is enabled.

  1. When editing or adding an alert, click Add Action in the Trigger or Reset Action section of the Alert Wizard.

  2. Select Manage VM - Change CPU/Memory Resources, and click Configure Action.
  3. Enter a name for the action.
  4. Under Select Virtual Machine, specify the virtual machine on which you want to adjust the number of CPUs, the memory capacity, or both.
    1. To change the resource allocation of the virtual machine that triggered the alert, click Execute this action.

      This option is only available if the alert is built to trigger for virtual machines.

    2. To change the resource allocation of a different virtual machine, click Select specific VM, and search for a virtual machine.
  5. To power off the virtual machine before changing the resource allocation, and then power it on again after the resource allocation has been changed, select the relevant option.

    If the option is not selected, the action will be performed live on the virtual machine.

  6. Under Specify New Resources, specify whether you want to add more resources to the virtual machine, or replace the existing resources with new resources, and then specify the parameters of the new resource or resources.
    1. Select Number of processors, and specify the number of processors to allocate.
    2. Select Memory, and specify the memory capacity to allocate.
  7. Schedule the action by selecting Time of Day > Use special Time of Day schedule for this action . This schedule only applies to the alert action you are editing.

    This is often used to prevent an action from occurring during specific windows.

  8. Select how frequently this action occurs for each triggered alert in Execution Settings.

  9. Click Add Action.

The action is added to the trigger or reset action list, and you can test the action using the Simulate button. When the trigger or reset conditions of the alert are met, the specified CPU and memory resources will be allocated to the virtual machine.


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