Making effective use of licenses – HP Matrix Operating Environment Software User Manual
Page 108
Table 10 Predefined analysis queries: Finding overused systems (continued)
Description
Query name
VM hosts that have been overloaded with VMs.
Consider moving some VMs to other hosts.
Overutilized VM hosts
VMs that are exceeding their CPU utilization limits. These systems
are probably experiencing performance issues.
Consider adding more virtual cores to the VMs.
VMs short on CPU capacity
VMs that have memory paging rates greater than 500
pages/second. High paging rates can cause serious performance
issues.
Consider adding memory to VMs that match this query.
VMs with a high paging rate
VMs with network utilization constrained by the current resource
configuration. VMs are not only constrained by the physical
hardware — high network traffic in a VM can result in a high
virtualization overhead.
Network constrained VMs
Windows systems with memory paging rates greater than 50
pages/second. Microsoft recommends that the paging rate is no
higher than 50 pages per second per spindle on the swap LUN.
See
Exceeding Microsoft's paging recommendation
Physical peak memory utilization significantly less than what is
provisioned. It is probably safe to remove half of the memory, or
move this workload to a smaller server.
Systems with over-provisioned memory allocations
Making effective use of licenses
The software licenses on a server often cost much more than the server itself. By creating an HP
SIM collection of servers running software that is licensed by the core, Capacity Analysis can
quickly search for systems that have more cores than needed. Moving these workloads to smaller
servers can be a way to save money.
For example, Capacity Analysis comes with the following predefined queries that can identify ESX
VMs that are not making the most effective use of their vRAM entitlement and might be costing
more than they need to. These queries can easily be customized for HP VMs or Microsoft Hyper-V
VMs.
Table 11 Predefined analysis queries: Finding cost savings
VSphere5 VMs that are not using all of their vRAM. vRAM
entitlements can be the most expensive part of a VSphere license.
It may be safe to reduce the memory allocation of these VMs by
30% or more.
VSphere5 vRAM over allocation
The cost of vRAM entitlements in ESX is expensive with large
memory VMs. The licensing costs of these VMs are in the hundreds
of dollars each. These might be more cost effective as small physical
servers or running under a different hypervisor.
VSphere5 VMs using at least 16 GB of vRAM
These low usage systems could be unused. Deleting unused
VSphere5 VMs can save money on software licenses.
VSphere5 VMs with low usage
This guide also includes a custom query example that finds systems with more cores than needed.
See
“Example: Reducing licensing costs by finding VMs with one too many cores” (page 125)
.
108 Using Capacity Analysis