000-221 · Question #3
Before changing virtual memory settings, how can an administrator check the valid range of values for a tuning parameter?
The correct answer is D. vmo-L. The vmo command is the AIX virtual memory options tuner, and the -L flag lists every tunable parameter along with its current, default, minimum, and maximum values.
Question
Before changing virtual memory settings, how can an administrator check the valid range of values for a tuning parameter?
Options
- AIscfg-T
- BIsattr-R
- Cvmtune-l
- Dvmo-L
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Why each option
The vmo command is the AIX virtual memory options tuner, and the -L flag lists every tunable parameter along with its current, default, minimum, and maximum values.
lscfg -T is not a valid flag combination for querying tuning parameter ranges; lscfg is a hardware configuration tool, not a memory tuner.
lsattr -R displays the range of valid values for a device attribute in the ODM, not for virtual memory tuning parameters managed by vmo.
vmtune is a legacy AIX command that was replaced by vmo; the -l flag is not a valid option for listing parameter ranges in current AIX versions.
vmo -L (capital L) displays a comprehensive table of all virtual memory tuning parameters managed by vmo, including the valid minimum and maximum range for each parameter. This allows an administrator to verify acceptable input boundaries before applying any changes with vmo -o. The capital -L flag is distinct from lowercase -l and provides the full range metadata needed for safe tuning.
Concept tested: vmo command for virtual memory parameter range validation
Source: https://www.ibm.com/docs/en/aix/7.3?topic=v-vmo-command
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