Using the Oversized Reports in vCops

[ElGogy]

Hi to everyone.

I am trying to get more deep knowledge about vCops and their reports.

In a scenario where the VMs never exceed 50% usage of the allocated memory.

For example, vms are configured with 12GB but never use more than 4GB.

What benefits would in configure with 4GB?

Is there any real benefit or just useful to ensure that no over allocation occur?

The question arises in trying to understand the benefit of using the Oversized reports and the Efficient Badge in vCops, that recommend to set less memory for each vm.

This report is useful only on a overcommitted scenario?

Thanks in advance and have a good day.

[vThinkBeyondVM]

Yes. Oversized report would help you to analyse whether my environment has enough memory resources? Based on oversized report you can reduce memory allocation for the VMs those are using less memory and utilize the same memory for VMs those are running memory sensitive applications. Also you can think on memory reservation set on underutilized VMs and can reduce the same as well. Oversized report also help you to provision more VMs on the same host & helps in configuring HA feature.(admission control, failover capacity etc)

You can increase the memory allocation and/or reservation for the VMs those are over-committed.

[sneddo]

Just to expand on what vickyvision2020 said: You will see a benefit in environments that are not over-provisioned as well. A lot of modern OS/applications will claim more memory if it is available, however the amount of *active* memory can be significantly less. So if you have an application that claims 2GB of memory, but never actually uses more than 500MB, you can quite easily claim 1.5GB back to allocate to another VM. This will mean you run a higher density of VMs per host, which reduces overall cost of your infrastructure.

In your case, if your VMs never exceed 50% then the benefits will be not as pronounced. You may save a few hundred MB in VM overhead, and will have an impact on your HA slot sizes, but overall you may not see a dramatic difference.

[NuggetGTR]

Just make sure you change the default oversize values, by default i think if it spends more than 7.5 hours in a month demanding less than 30% of the allocated resources it will show up in the oversized report