Changing the size of the shared memory pool

You can increase or decrease the amount of physical memory assigned to the shared memory pool by using the Hardware Management Console (HMC).

Before you begin

You must be a super administrator of operator of the HMC to change the size of the shared memory pool.

About this task

If there is not enough physical memory available in the system by which to increase the amount of memory assigned to the shared memory pool, you can release to the hypervisor the physical memory that is currently assigned to dedicated memory partitions that are shut down. The hypervisor can then assign the released physical memory to the shared memory pool.

If the shared memory pool has insufficient physical memory by which to decrease the amount of memory in the shared memory pool, you can release to the hypervisor the I/O entitled memory that is currently assigned to shared memory partitions that are shut down. The hypervisor can then remove the released physical memory from the shared memory pool.

For more information about managing shared memory pools, see Managing shared memory pools.