Configuring memory

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Learn how to configure the memory on your system. You can set the size of the logical memory block, the system memory page, the PCI memory space, and allocate platform memory during initial program load (IPL).

Note: The system must be powered off. Any changes to the memory configuration are effective on the next restart.

Logical memory block size

The logical memory block size is the size of the blocks that the kernel uses to read or write files.

To set the size of the logical memory block, complete the following steps:
  1. Select the Memory block size value.
  2. Click Update logical memory block size.

You can improve the performance of the application by setting large virtual memory page sizes of 16 GB each.

System memory page setup

To set the size of the system memory page setup, complete the following steps:
  1. Enter the Max number huge pages.
  2. Select the Requested huge page memory.
  3. Click Update system memory page setup.

I/O Adapter enlarged capacity

You can control the size of the PCI memory space that is allocated to each PCI slot.

To the size of the PCI memory space, complete the following steps:
  1. Select the Slot count for node.
  2. Click Update I/O adapter enlarged capacity.

Dynamic I/O drawer attachment

You can allocate platform memory during IPL for PCIe slots to enable dynamic I/O drawer attachment.

Note: This feature is available on firmware version FW 1060, or later.
To enable dynamic I/O drawer attachment, complete the following steps:
  1. Select the Slot count for node.
  2. Click Update dynamic I/O drawer attachment.

Active memory mirroring

Active memory mirroring for hypervisor is designed to ensure that system operation continues even in the unlikely event of an uncorrectable error that occurs in main memory that is used by the system hypervisor.

You can view whether the active memory mirror mode is enabled or disabled on your system.