Hello,

Does anyone have an explanation of why this service returns different
capacity figures for the partition if z/OS is running under VM from when
running natively.

Thanks

Steve

The following is taken from the z/OS V1R9.0 MVS Authorized Assembler
Services Reference 

QvsCecCapacity, QvsImgCapacity, and QvsVmCapacity contain the maximum
service rate that theoretically could be achieved at each level. The
value is in millions of service units per hour (MSU).

QvsCecCapacity is equal to the individual CPU speed multiplied by the
number of online and offline physical CPUs.

If QvsImgValid is on, the image is in ESAME mode, and QvsVmValid is off,
then QvsImgCapacity is equal to one of the following:

*       The partition's defined capacity set via the Hardware Management
Console, if any
*       The individual CPU speed multiplied by the number of online and
offline logical CPUs, if the partition is uncapped and has no defined
capacity
*       The capacity at the partition's weight, if the partition is
capped via the Hardware Management Console.

If QvsImgValid is on, and either the image is in ESA/390 mode or
QvsVmValid is on, then QvsImgCapacity is equal to the individual CPU
speed multiplied by the number of online and offline logical CPUs.

QvsVmCapacity is the individual CPU speed multiplied by the number of
online and offline virtual CPUs.

In all cases, the individual CPU speed in based on the MP factor for the
number of online and offline physical CPUs.


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