HP Integrity Virtual Server Manager 6.0 User Guide

NOTE: Data reported by certain Virtual Server Manager CPU utilization meters might vary
from the data collected by Capacity Advisor as displayed in the Profile Viewer and historical
utilization reports. The data from Virtual Server Manager meters is reliable for most purposes.
For capacity planning, refer to the data collected by the Capacity Advisor Profile Viewer and
historical utilization reports. For more information about how Capacity Advisor data might
vary from Virtual Server Manager data, see “Data Handling for Virtual Partitions” in Chapter
3 of the HP Capacity Advisor 7.0 User Guide.
Another source of discrepancy is the difference in the way Capacity Advisor and Virtual Server
Manager present CPU data. Capacity Advisor Profile Viewer and historical utilization reports
present CPU data in absolute terms (specifying the number of physical cores used) while Virtual
Server Manager presents CPU data in terms of percentages (specifying the percentage of
available CPU resources being used). For example, the Virtual Server Manager “VSP CPU
Utilization” meter displayed on the VSP Virtual Partitions and VM Properties General tabs
displays the percentage of the total VSP physical CPU capacity used by the virtual partition
in question. Capacity Advisor tabulates similar data but presents it in different terms. For
example, on a VSP that has 16 physical cores, if a VM has 4 CPUs each currently using 50%
of a physical core, CapAd would report that the VM is consuming 2 VSP cores. The Virtual
Server Manager “VSP CPU utilization” meter would report that the VM is consuming 12.5%
of the VSP's CPU capacity.
• Using Virtual Server Manager with HP Matrix Operating Environment:
You can click a utilization meter to view a more detailed historical data report provided
by HP Capacity Advisor.
◦
◦ You can use the Virtual Server Manager View→Capacity Advisor Data... menu item to
view a snapshot of recent utilization data collected by HP Capacity Advisor. First, you
must enable collection of data by using the Tools→Collect Capacity Advisor Data menu
item, as described in “Enabling collection of utilization data” (page 113). (If you use the
Virtual Server Manager View→Capacity Advisor Data... menu item without having enabled
data collection, no data is displayed; however, the screen includes a link to the Collect
Capacity Advisor Data facility so that you can begin collecting data to view.)
Figure 67 (page 116) shows the upper half of the screen showing data collected for a
VSP, while Figure 68 (page 117) shows the lower half of the screen.
Viewing utilization data 115