Setting VMRM goals for a server complex

The VMRM (VM Resource Manager) performance goal specifies the percentage of CPU and IO resources for a group of virtual machines in a z/VM. By setting the VMRM properties, you set a VMRM goal for Linux guest systems in a server complex and, thus, configure the VMRM to maintain that performance goal.

You can specify these VMRM goals for each tier separately or specify a common goal for all the Linux guest systems in the server complex.

A VMRM goal is considered valid if and only if both:

Complete the following steps to edit the VMRM configuration domain:

  1. If it is not started already, start the Server Complexes task for the z/VM system you want to work with.
  2. Select the server complex for which you want to set the VMRM goals.
  3. Click ActionEdit Properties to open the Server Complex Properties window and click the VMRM tab to display the VMRM page.
  4. Choose whether the configuration target is the entire server complex or a specific tier.
  5. If you chose the Specific tier radio button, choose the desired tier. The properties of the selected tier are displayed.
  6. In the CPU field, type the VMRM CPU velocity goal. This is a value from 1 to 100.
  7. In the DASD field, type the VMRM DASD (direct access storage device) velocity goal (IO priority). This is a value from 1 to 100.
  8. In the Importance field, type the VMRM importance of the goal. This is a value from 1 to 10. The Linux guest system with the higher relative value will take precedence in the case of a conflict over resources. Goals with a higher importance value will have higher priority when being maintained by VMRM.
  9. Click OK to apply the modified settings to the Linux guest systems currently in the server complex. If you modified settings in any of the other domains (except for the Scripts domain), these are also applied to the Linux guest systems in the server complex. Before applying the modified properties, the Server Complexes task runs a consistency check against the old properties.
  10. The Progress Indication window shows the progress of the action. If there is an inconsistency, you are given a choice whether to proceed or stop. Stopping saves the new properties but doesn't apply the configuration. After the operation is completed, click Close to close the Progress Indication window.
註: At any time, with or without changing the property values, you can open this page and click the Apply button to directly apply the properties of this domain to Linux guest systems in the server complex. For more information, see Directly applying server complex properties in a single domain.
註: For further information on VMRM, see z/VM 5.1 Performance (SC24-6109-00), chapter 17, "VMRM SVM Tuning Parameters".
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