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AIX 5L Practical Performance Tools and Tuning Guide by IBM Redbooks

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5.2. Memory tuning

Tuning memory performance is very important and dynamic part of achieving the best results possible. There are many settings that can be changed, and it can be difficult to get the right combination of changes to improve performance. The commands in this section can be used to change memory settings on the system. Some of these commands have multiple uses, however in this section we will only discuss how they can be used to tune memory performance.

5.2.1. The vmo command

The vmo command is a run time tool used to tune the VMM settings. It is located in /usr/sbin, and is installable from the base AIX Installation media. All the settings set by the vmo command are also saved in /etc/tunables.

Syntax

vmo -h [tunable] | {-L [tunable]} ...

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