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Virtual Machines. Right-sizing – VMs Undersized for Memory and CPU

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This report helps you to detect virtual machines that have less allocated vRAM or vCPU resources than they require. The report analyzes historical performance and configured resource allocation to provide recommendations for an optimized VM configuration and allocation of resources.

noteNote

This report assumes desired 25% headroom on top of any peak of VM usage. Consider this when evaluating the results of this report.

Example Output

In this example, the report allows you to detect top 10 VMs that have less allocated memory and CPU resources than they require. Performance statistics for the last month were used as a basis for the report analysis.

To run this report:

1.From the From list, choose This month > First day. From the To list, choose Today.
2.From the Sections to Show list, choose both vRAM and vCPU.
3.From the Show Details list, choose Yes (collapsed).
4.From the Performance Modeling Based On list, select Average Usage.
5.In the Top N Count field, type 10.
6.Click Run to view the report.

Right-sizing – VMs Undersized for Memory and CPU Report Settings

The report will show tables and charts displaying information on top 10 VMs memory and CPU consumption: allocated, recommended, min/max and average memory values, standard deviation and current configuration.

The report contains two sections:

Virtual machines that have not enough vCPUs allocated.

Right-sizing – VMs Undersized for Memory and CPU Report Output for RAM

Virtual machines that have not enough RAM allocated

Right-sizing – VMs Undersized for Memory and CPU Report Output for vCPU

You can click the plus sign next to any virtual machine name in the table to view details for that virtual machine.

Right-sizing – VMs Undersized for Memory and CPU Report Output Details

The Recommendations analysis sections for both vCPU and vRAM will summarize the total savings possible by reclaiming the resources found by the report.

noteNote

All recommendations are based on the current configuration. So, if a virtual machine has no current configuration (is turned off or decommissioned), it will not be included in the report.

RAM Analysis recommendation table:

RAM Analysis

CPU Analysis recommendation table:

CPU Analysis

You can click the name of an undersized VM or the Undersized VMs link in the RAM analysis and CPU analysis tables to drill down to performance details for these VMs.

You can click the VMs that cannot be analyzed link in the RAM analysis and CPU analysis tables to drill down to performance details for these VMs.

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