WLM statistics

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The WLM section in the recorded file contains the workload manager (WLM) statistics. The WLM statistics are related to CPU, memory, I/O.

You can use the -W option to enable the Workload Manager statistics collection in the nmon recording. Workload Manager (WLM) is designed to provide increased control to the system administrator on how the process scheduler, virtual memory manager (VMM), and the disk I/O subsystem allocate resources to the processes.

The different tags that represent WLM statistics follow:

WLMCPU, CPU percent for <WLMCount> Classes, < WLMClasses>

<WLMCount> : Total number of WLM Classes 
<WLMClasses> : This is a comma separated list form of WLM Classes.

If WLM classes WLMClass1 and WLMClass2 exist in the LPAR, an nmon recording for WLMCPU section is displayed, which is similar to the following example:

WLMCPU, CPU percent for 2 Classes, WLMClass1, WLMClass2

For each sample, percentage of CPU used by corresponding WLM class is recorded.

WLMMEM, Memory percent for <WLMCount> Classes, <WLMClasses>

Percentage of real memory that is used by corresponding WLM class.

WLMBIO, Block IO percent for <WLMCount> Classes, <WLMClasses>

Percentage of disk I/O bandwidth that is used by the corresponding WLM class.