Solved

VMware ESXi 5.0 not using all available CPU and RAM?

Posted on 2012-04-11
1
1,111 Views
Last Modified: 2012-04-13
I have a "home lab" ESXi 5.0 host with 16GB RAM and about 8 VM's, two of which are running currently: a Win 7 32-bit with 1.5GB RAM (all reserved) and a Windows Server 2011 64-bit 3 GB RAM (none reserved).

1. vSphere client reports on the host summary tab having 16 MB RAM but the resource allocation tab for VM's reports only about 13GB available. (See attached.) Why is that? Is there something wrong? Note that the overhead for one VM is 45MB and for the other 90MB for a total of 135MB - nothing approaching the ~3GB difference.

2. vSphere client reports having 4 x 3.392 MHz = 13.584 MHz of CPU capacity, yet the capacity apparently available to VM's is only 11532 Mhz. (see attached.) Why is that? Is there something wrong with my configuration?
vsphere-resources.jpg
0
Comment
Question by:johnnyt29
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 121

Accepted Solution

by:
Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 37835815
(small thing, in your picture it should be 13.568GHz or 13568MHz!)

there is nothing wrong here, this is normal, and this is a common question, when VMware Admins spot it, in the Summary Tab, when comparing to Resource Allocation, and the same is true when comparing Cluster Resources against Resource Allocation.

2036MHz and 2788.27MB are reserved internally to execute the virtualisation software. (VMware Hypervisor).

In one of the VMware documents, and I cannot remember which one at present, it could be the Resources Guide, there is a phrase which states it's due to virtualisation software, or required by the virtualisation software.

So the Summary Page for the Host, is the raw, CPU and Memory in the Host, Resource Allocation is what it can actually allocate, the word "reserved" is strictly not quite true, because it can allocate out the full amount, as seen in summry pages.
0

Featured Post

Migrating Your Company's PCs

To keep pace with competitors, businesses must keep employees productive, and that means providing them with the latest technology. This document provides the tips and tricks you need to help you migrate an outdated PC fleet to new desktops, laptops, and tablets.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

If we need to check who deleted a Virtual Machine from our vCenter. Looking this task in logs can be painful and spend lot of time, so the best way to check this is in the vCenter DB. Just connect to vCenter DB(default DB should be VCDB and using…
Ransomware is a malware that is again in the list of security  concerns. Not only for companies, but also for Government security and  even at personal use. IT departments should be aware and have the right  knowledge to how to fight it.
Teach the user how to use create log bundles for vCenter Server or ESXi hosts Open vSphere Web Client: Generate vCenter Server and ESXi host log bundle:  Open vCenter Server Appliance Web Management interface and generate log bundle: Open vCenter Se…
This tutorial will walk an individual through the steps necessary to enable the VMware\Hyper-V licensed feature of Backup Exec 2012. In addition, how to add a VMware server and configure a backup job. The first step is to acquire the necessary licen…
Suggested Courses

632 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question