Hyper-V Memory Usage Test

If one/more VMs on a Hyper-V host are over-sized with physical memory resources, it can result in a serious memory contention that may not only affect the host, but also other VMs on the host. By tracking the physical memory allocation to the VMs on a Hyper-V host, administrators can proactively detect over-allocations and can initiate remedial actions before the problem impacts performance. For this, administrators can use the Hyper-V Memory Usage test. This test monitors the physical memory allocated to the VMs, and points to those VMs that are allocated more resources than required.

Target of the test : A Hyper-V / Hyper-V VDI server

Agent executing the test : An internal agent

Output of the test : One set of results for the Hyper-V host monitored

Configurable parameters for the test
  1. Test period - How often should the test be executed
  2. Host - The host for which the test is to be configured.
  3. DETAILED DIAGNOSIS - To make diagnosis more efficient and accurate, the eG Enterprise embeds an optional detailed diagnostic capability. With this capability, the eG agents can be configured to run detailed, more elaborate tests as and when specific problems are detected. To enable the detailed diagnosis capability of this test for a particular server, choose the On option. To disable the capability, click on the Off option.

    The option to selectively enable/disable the detailed diagnosis capability will be available only if the following conditions are fulfilled:

  • The eG manager license should allow the detailed diagnosis capability
  • Both the normal and abnormal frequencies configured for the detailed diagnosis measures should not be 0.
Measurements reported by the test
Measurement Description Measurement Unit Interpretation

Total memory available

Indicates the total physical memory capacity of the host.

MB

 

Memory allocated to VMs

Indicates amount of physical memory allocated to VMs.

MB

 

Memory used by VMs

Indicates the percentage of physical memory that is allocated to the VMs on the host.

Percent

Ideally, this value should be low. A value close to 100% is indicative of over-allocation of physical memory to the VMs. You can use the detailed diagnosis of this measure to identify which VM has been allocated maximum resources.

Available memory for VMs

Indicates the amount of physical memory unused on the host.

MB

Ideally, the value of this measure should be high. A low value or a consistent decrease in this value is a cause for concern, as it indicates excessive memory usage by the VMs on the host.