Kernel-Managed Swap Facility (KMSF) Manual

Managing KMS Files

Kernel-Managed Swap Facility (KMSF) Manual—425824-005

3-11

Altering Your KMSF Configuration

Alter your configuration as necessary to ensure proper system operation. Using

NSKCOM, you can resize swap files, add and delete swap files, and change the

threshold at which EMS messages are generated.

Writing Your Own Operator Guidelines

Because KMSF is vital to system operations, consider writing your own operator

instructions for altering the KMS configuration. You might want to provide guidelines for

the conditions under which to increase the amount of swap space, on which disks to

add swap files, and when it is permissible to resize a swap file.

Preparing for Change

You may need to alter your configuration to improve process creation or to prepare for

a change that might consume a large amount of swap space. In general, consider

altering your configuration by increasing the processor’s swap space in the following

situations:

•

If you increase the number of processes running in a processor.

•

If you add a program that requires large amounts of memory.

Adding Swap Files

Use the NSKCOM ADD command to create swap files and add them to your KMSF

configuration. The swap files are not enabled for use until you enter the START

command or load the processor. See Section 4, NSKCOM Command Reference, for

attributes that you can specify. In Example 3-8, the ADD command is used to add a

swap file for CPU 1 with a threshold of 75 percent.

Example 3-8. Adding a Swap File

NSK-ADD SWAPFILE $SWAP.KERSWAP.CPU01B CPU 1, THRESHOLD 75

File $SWAP.KERSWAP.CPU01B was added to ZSYSCFG

ADD was successful: $SWAP.KERSWAP.CPU01B

NSK-