Disabling huge pages for the mobile partition

This procedure provides step-by-step instructions that explain how to disable huge pages for the mobile partition.

Before you begin
To disable huge pages, you must be a super administrator.
About this task

Huge pages can improve performance in specific environments that require a high degree of parallelism, such as in DB2 partitioned database environments. You can specify the minimum, desired, and maximum number of huge pages to assign to a partition when you create the partition or partition profile.

For a logical partition to participate in active partition mobility, it cannot use huge pages. If the mobile partition uses huge pages, it can participate in inactive partition mobility.

To disable huge pages for the mobile partition using the HMC, complete the following steps:

  1. In the navigation area, open Systems Management and select Servers.
  2. Select the managed server of your choice in the navigation area.
  3. Select Properties in the Task area.
  4. Click the Capabilities tab.
    • If Huge Page Capable is True, then click OK and continue with the next step.
    • If Huge Page Capable is False, then the source server does not support huge pages. The mobile partition can participate in active or inactive mobility. Skip the rest of this procedure and continue Preparing the mobile partition for partition mobility.
  5. In the navigation area, open Systems Management and select Servers.
  6. Select the managed server of your choice in the navigation area.
  7. In the contents area, select the partition of your choice.
  8. Select Properties and the Hardware tab and then the Memory tab.
    • If the current huge page memory equals zero, then skip the rest of this procedure and continue Preparing the mobile partition for partition mobility.
    • If the current huge page memory is not equal to zero, then take one of the following actions:
      • Perform an inactive movement instead of an active movement.
      • Click OK and continue with the next step to prepare the mobile partition for an active movement.
  9. In the navigation area, open Systems Management and select Servers.
  10. Select the managed server of your choice in the navigation area.
  11. In the contents area, select the partition of your choice.
  12. Select Configuration > Manage Profiles.
  13. Select the profile of your choice and select Actions > Edit.
  14. Click the Memory tab.
  15. Enter 0 in the field for desired huge page memory, and click OK.
  16. Activate this logical partition with this profile in order for this change to take affect.
Related information
HMC Tasks and roles