Not 128GB, but 127,97 GB

[Infextro]

Good day. My ESXi 6.5.0 host shows not 128 GB RAM, but 127,97 GB. It means that my RAM has bad blocks, etc., or it is just VMware internal memory reservation?

Thank you,

Sergio

[RJB3ST]

Hello Sergio,

The missing memory is being used by the host system (ESXi), it generally uses around 300MB-400MB in order for it to run. If you'd like to check please follow the below:

Login to the web client > Click on your host > Manage > Settings > Memory

Let me know how you get on.

Kind Regards,

RJ

[Infextro]

Good day, RJ.

Thank you for your answer.

I have free ESXi, and i can't find "Settings" > "Memory" menu in my  "Manage" menu:

May be this can be found in ESXi console?

Regards,

Sergio

[RJB3ST]

Hi Sergio,

My apologies I was thinking you had vCenter, which if you did that would be how you'd find out.

For the host only HTML5 client I'm not sure you can go that in-depth, I've had a quick look and can't see memory statistics of what the host/VMs memory use is.

I am certain though that the memory is being used by the host, just that it doesn't display that using the host only client ! (Happy to be proved wrong if someone else has a suggestion).

Kind Regards,

RJ

[Infextro]

Thank you. I opened my host in vCenter client and got this:

128GB sloud be 131072MB.

But i have only 131044MB in total. It is ~127,97GB.

About 28MB of loss

Regards,

Sergio

[a_p_ · Accepted solution]

Not sure, but maybe related to some caching (depending on BIOS settings) on the physical host.

see http://www.supermicro.com.tw/products/motherboard/Xeon/C600/X9DR3-F.cfm

André

[Infextro]

Thanks. I checked some other ESXi hosts (10+) from my other workplace, and they also have 25-130 MBs of loss (depends on the value of installed RAM).

Solved.

Regards,

Sergio