POWER7 information

Moving dedicated memory dynamically

You can dynamically move physical memory from one running logical partition that uses dedicated memory to another using the Hardware Management Console (HMC). This allows you to reassign physical memory directly to a logical partition that uses dedicated memory that needs additional physical memory.

You cannot dynamically move memory from a running Linux logical partition. To remove memory from a Linux logical partition, you must shut down the Linux logical partition and reactivate the logical partition using a partition profile that specifies a lesser amount of memory.

You can dynamically move memory to a running Linux only if the following conditions are met:

  • A Linux distribution that supports the dynamic addition of memory resources is installed on the Linux logical partition. Distributions that support the dynamic movement of memory resources include Novell SUSE Linux Enterprise Server 10, and later.
  • The DynamicRM tool package is installed on the Linux logical partition. To download the DynamicRM tool package, see the Service and productivity tools for Linux on POWER® systems Web site.

To move memory to a Linux logical partition that uses an earlier version of these distributions, you must shut down the Linux logical partition and reactivate the logical partition using a partition profile that specifies a greater amount of memory.

To dynamically move memory from one running logical partition to another using the HMC, follow these steps:
  1. In the navigation pane, open Systems Management > Servers, and click the managed system on which the logical partitions are located.
  2. In the work pane, select the logical partition, click the Tasks button, and click Dynamic partitioning > Memory > Move.
  3. Enter the amount of physical memory that you want to move from the logical partition. You can enter the size in a combination of gigabytes (GB) plus megabytes (MB).
  4. Select the logical partition to which you want to move the specified amount of physical memory.
  5. Adjust the settings in the Options area if necessary. You might need to increase the value in the Timeout (minutes) field to allow enough time for the HMC to complete the operation. (These settings relate to how the managed system moves memory dynamically. These settings are not retained after the move operation is completed.)
  6. Click OK.
Parent topic: Managing dedicated memory dynamically

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Last updated: Thu, September 20, 2018