VMWare ESXi 4.1 showing less hardware resources as "Total Available Resources"

RobKanj
RobKanj used Ask the Experts™
on
Hi Everyone,
I've recently built an VMWare ESXi testing server on a HP ML110 with following CPU and memory configs:
Intel Xeon CPU 3065 @ 2.33 GHz
CPU Cores: 2 CPUs x 2.327 GHz

RAM = 8 GB

But my VMware shows "Available CPU Total Capacity" as 3257 MHz instead of around 4 GHz
and "Total Available RAM Capacity" of 5966 MB instead of around 8GB.

Please refer to included screen shots.

As am relatively new to VMWare, is it normal to have these figures or something could be done to get more out of my hardware?

Thanks in advance.

VMWare-ScreenShot-1.png
VMWare-ScreenShot-2.png
Comment
Watch Question

Do more with

Expert Office
EXPERT OFFICE® is a registered trademark of EXPERTS EXCHANGE®
Unfortunately EXSi has to reserve some ram and CPU for itself

To enhance performance, VMware recommends that you install ESXi on a robust system with more RAM than
the minimum required and with multiple physical disks.
Consider the following recommendations for enhanced performance:
n   RAM – ESXi 4.1 hosts require more RAM than typical servers. An ESXi 4.1 host must be equipped with
    sufficient RAM to run concurrent virtual machines.
    For example, operating four virtual machines with Red Hat Enterprise Linux or Windows XP requires at
    least 3GB of RAM for baseline performance. This includes approximately 1024MB for the virtual machines
    (256MB minimum for each operating system as recommended by vendors).
    Running these four virtual machines with 512MB RAM requires that the ESXi 4.1 host be equipped with
    approximately 4GB RAM, which includes 2048MB for the virtual machines.
    These calculations do not take into account possible memory savings from using variable overhead
    memory for each virtual machine. See the Resource Management Guide.
n   Dedicated Fast Ethernet adapters for virtual machines – Place the management network and virtual
    machine networks on different physical network cards. Dedicated Gigabit Ethernet cards for virtual
    machines, such as Intel PRO 1000 adapters, improve throughput to virtual machines with high network
    traffic.

That is taken from this document.
http://www.vmware.com/pdf/vsphere4/r41/vsp_41_esxi_i_vc_setup_guide.pdf
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Commented:
I would not worry about those arbitary resource values, you will be able to use all the resources available in the Summary Page.
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Commented:
try it out allocate 2x 4g to both VMs.
Acronis in Gartner 2019 MQ for datacenter backup

It is an honor to be featured in Gartner 2019 Magic Quadrant for Datacenter Backup and Recovery Solutions. Gartner’s MQ sets a high standard and earning a place on their grid is a great affirmation that Acronis is delivering on our mission to protect all data, apps, and systems.

Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017
Commented:
Here's a small video which is part of my power consumption tests on the HP ProLiant Microserver N36L, where we power up a few virtual machines, the N36L, has a single Dual Core Processor, 1.3GHz on the specifcaitions, and 8GB of RAM. But the summary pages shows 1.297GHz, and 8062RAM.

As you'll see in the Summary Page as we power on virtual machines, we are able to use ALL the CPU GHz grunt and Memory the physical server has to offer. So I wouldn't be too worried about what you read in resource allocation, you will be able to use all the resources you server has, if you really overcommitt the memory and push the CPUs really hard, as this example shows.

http://andysworld.org.uk/2011/08/08/new-hd-video-fully-loaded-hp-proliant-microserver-n36l-with-vmware-vsphere-41-u1-hypervisor/

Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Commented:
You will see in the video at 3m 55s, after powering on all VMs we hit the magic 2594 MHz, maximum 100% CPU, and hitting the total memory 7508MB (554MB short of max!).

You need to try really hard to fully utilise a host server!

Author

Commented:
Thank you rabbid and hanccocka - very helpful in understanding the allocation of memory and CPU.
Much appreciated
Equal points!
Best
Rob

Do more with

Expert Office
Submit tech questions to Ask the Experts™ at any time to receive solutions, advice, and new ideas from leading industry professionals.

Start 7-Day Free Trial