Hyper-V Host Server RAM Utilization

Hi,
We are running Hyper-V Environment on a Dell Power Edge R720 Server which has 128GB RAM.
Installed Windows Hyper-V Server 2012 R2 on the Host and created 7 VM's.
Total RAM assigned for 7 VM's is 116GB and remaining available is 12GB. But when i am trying to create a new VM on this host,it says you don't have sufficient RAM to create a VM. what could be the reason ?
How much memory does the Host server occupy and what factors does this take into consideration ?
11GB for a Server Core installation of OS ? i am stuck here ?
Thanks .

http://blogs.msdn.com/b/tvoellm/archive/2009/12/18/hyper-v-performance-faq-r2.aspx is a blog post that provides the overhead numbers I listed for the VM memory
size, but there isn't a whole lot more to read on that topic. It is just a statement of fact. Yes, this blog was written for 2008, but to my knowledge nothing has changed in this space. The 8-10 MB per VM is something I have observed.
As for the rest of the memory allocated in your host, a good place to start would be Mark Russinovich's Windows Internals books. They are tomes, but they have all the information you would ever want to know about how Windows works and Windows allocates
memory. Then, from that information, you would be able to look at your system to determine where the memory is being allocated.
.:|:.:|:. tim

Similar Messages

How to backup Hyper-V host server on DPM 2012 R2

Hi,
I'm about to backup my first Hyper-V host server using DPM 2012. I'm looking for a strategy to back up both the host server and virtual machines. Note: I'm not really interested in backing up all the virtual machines. Many are non-production
or for testing. How do you do it? I was thinking about selecting in the protection group:
- BMR and SS for the Hyper-V host
- The C: volume of the Hyper-V host
- Select the Child partition snapshots of the virtual machines I want to backup.
In my environment, Hyper-V role is installed on the C: drive, but the virtual machines are stored on E:, which I would not backup directly (volumes) since I'm backing up the VMs using Child partition snapshot.
Would I be able to restore my Hyper-V host and the selected VMs with a backup like this?
Anyone want to share how they setup their protection groups for Hyper-V?
Thanks.

No, use full server backup (image) if VM config are stored at default storage (disk C).
Understanding where your virtual machine files are [Hyper-V]
Using this method to perform a full server backup is the recommended method because it captures more data than the other method.
Backing Up Hyper-V Virtual Machines
http://social.technet.microsoft.com/Forums/en-US/4592bad3-9f5d-4313-b9a0-9da6de7f43c2/restoring-vm-settings?forum=winserverhyperv
Have a nice day !!!

Hyper-V host server upgrade from Server 2008 R2 Enterprise SP1 to Server 2012 R2 Datacentre

We are about to upgrade our Hyper-V host servers from Server 2008R2 Enterprise SP1 to Server 2012 R2 Datacentre to take advantage of the latest Hyper-V features.
This only concerns the host servers and not the guest VMs running on the hosts (they will be upgraded next year).
This is what is running on our host servers:
Host 1
File,print & issuing CA server
Exchange 2010
SharePoint 2010
Quickbooks server
Domain controller 1
Offline CRL CA
Host 2
SQL 2008
Forefront TMG 2010
Domain Controller 2
Windows 7 client
With this is mind, I have drafted a rough action plan as follows:
Create a list of all file locations for VM memory, snapshots, virtual memory and Hyper-V config files
Document all existing system settings
Gather server information, download drivers, RAID controller and other boot drivers & firmware updates (in case the in-place upgrade fails)
Test all software media
Copy all VMs onto external data storage (NAS drive)
As part of the upgrade process we will redistribute some hard drive space i.e.
expand them to their new sizes and verify the data integrity of copied VMs by powering up each VM in a test environment
Wipe and adjust the sizes of the host partitions to accommodate the expanded VMs
Perform an in-place upgrade to Server 2012 R2 Datacenter
Check EV, services etc
Change the default locations for VM memory, snapshots, virtual memory and Hyper-V config files
Upgrade Anti-virus and other system software
Test the system
Are there any glaring omissions? Does anyone have any tips they can give me?

Hi Marco,
always do a fresh Installation of your hyper-V Hosts, you could end up doing a lot of Troubleshooting with Drivers,Addons etc.. new Installation ist way faster.
Depending if you have a Cluster or Standalone Servers there are different ways to do it.
When you have installed your 2012 R2 Hyper-V Server you just can Import the VMs from the new Location.
As far as i know VMs with snapshots are not supported, so you have to remove them before doing that move and commit the changes to the vhd files, the VM need to be offline on 2008R2 to do that.
You do not Need to Export the VMs on 2008R2, just copy it, normaly you should have all Files of a VM in one Folder.
A working Backup is always your friend on such Tasks.
When the VMs are running on Hyper-V 2012R2 do not forget to Update the Integration Services.
Make Sure your Servers Hardware are still supported with 2012R2, see Server Catalog and Support Matrix of the Vendor.
And last one, where possible and supported convert the VHDs to VHDx Disks, after testing the first boot of the VM.
Udo

SBS 2011 VM and Server 2012 R2 Hyper-V host. After rebuilding the host image, no email is received, EMC states "You don't have sufficient permissions to view this data" when looking at organization config. Server config not shown on EMC.

Hyper-V Host Server 2012 R2 x64 drive c:
All VMs, including SBS 2011 Standard x64 are on drive d:
I replaced my motherboard and defined a Marvell RAID 1 Mirror for my boot drive C:. My drive D: containing all of my Hyper V machines remained untouched since the new MB had Intel Matrix Controller with RAID 5, as did the old MB.
Since the C: drives are a few bytes smaller after configured as a RAID 1, I was unable to restore drive C from the image copy, so I rebuilt a new Hyper-V Host identical as possible using Server 2012 R2 x64. I had to redefine the Hyper-V machines on
the host, and the 1st time I brought it all (host and VMs) I had to reconfigure the NICs due to new MAC addresses, and verifying SBS 2011 DNS and DHCP for all physical and Hyper-V machines. Otherwise my Hyper-V SBS 2011 x(64) wasn't touched.
Now the SBS Exchange 2010 is not receiving mail. In the Exchange Management Console clicking on the Organization config gives me a highlighted error "You don't have sufficient permissions to view this data". The Server
Config is no longer on the EMC. The Recipient Config looks fine.
Outlook 2013 x64 connects to the Exchange Server, but no new mail appeared. There were just a few older messages that came in since the last time I opened Outlook. My public DNS on GoDaddy was not changed. I did not change sending mail
through my ISP Sonic.net. The SBS internal DNS doesn't have an MX record, but I'm not sure it ever did since my GoDaddy public DNS has an MX record.
I tried restoring to an earlier Image Copy, but that made no difference. I'm using the Windows Backup from SBS 2011 for my daily image copy backups.
- Michael Faklis

Hi Michael,
à
After more research and running the Best Practices report from the EMC, I am missing a slew of ManagementRolesAndRoleGroups from the RBAC container.
Based on your description, it seems that you have find the cause of this issue. On current situation, I still
suggest that you should run
SBS 2011 BPA and then check if can find some relevant errors. Just for a confirmation.
Meanwhile, please refer to following articles and check if can help you.
Apply
missing Exchange 2010 RBAC Management Roles and Policies
RBAC Manager
(Exchange 2010 SP2)
Hope this helps.
Best regards,
Justin Gu

2012 R2 Hyper-V HOST with virtualized 2008 R2 SP1 RDSH - Remote FX Capable?

This article goes over RemoteFX and RDSH for 2008 R2 SP1, but nothing is discussed in regards to 2012 R2 Hyper-V HOSTs for the virtualized RDSH server.
http://blogs.msdn.com/b/rds/archive/2011/03/25/q-amp-a-microsoft-remotefx-and-remote-desktop-session-host-servers.aspx
My goal is to use a 2012 R2 Hyper-V HOST server to provide RemoteFX vGPU performance to a 2008 R2 SP1 RDSH server. Is this possible? If not, are there any solutions that can provide graphics performance benefits to an RDSH server? If so, are there limitations?
What are the benefits?

Hi,
A Server 2008 R2 VM does not support vGPU (neither does 2012/2012 R2). One possibility if the apps you want to improve are DirectX-based is to run RDSH on a physical server, with a GPU installed,
and enable the Use hardware default graphics adapter for all Remote Desktop Services sessions group policy setting.
Please thoroughly test with the intended applications, GPU, and expected concurrent number of sessions to see if this configuration benefits you. It only potentially benefits DirectX applications, and only applies to full desktop connections,
not RemoteApps.
Additionally you may want to test Windows Server Technical Preview/Windows Technical Preview since it has enhanced vGPU capabilities for the VMs. vGPU is supported for a single-user Windows Server RDSH VM. Please see the document below (and
its comments) for more information:
RemoteFX vGPU Updates in Windows Server Next
http://blogs.msdn.com/b/rds/archive/2014/11/05/remotefx-vgpu-updates-in-windows-server-next.aspx
Thanks.
-TP

RDP to hyper-v host sever core

Hi,
Is there a way to RDP to a hyper-V host server from any windows OS ?
Thanks

Hi Suren424,
I would like to check if you need further assistance ?
Best Regards
Elton Ji
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
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Hi, We are running domino application in windows server 2008r2 machine, we are facing High RAM utilization issue, but there is no such process are running.

Hi, We are running domino application in windows server 2008r2 standard virtual machine, we are facing High RAM utilization issue, but there is no such process are running. Machine is running in ESXI host, most of the time it shows high RAM utilization.
We upgraded the ram from 6 to 8 GB, but still facing the issue,
Where as other VMs working fine.
Need a help to find out the issue.

Hi Sathish sampath,
You can use Resource monitor and Task Manager->Performance to monitor the RAM memory utilization, I also recommend you to download the
RAMMap to get more detailed memory information.
For more detailed information to troubleshoot this issue, please also refer to this thread:
memory performance problem. Please help.
You can also choose to post your monitor picture to help us to troubleshoot.
I holp this helps.

Hyper-V host fails with "RPC Server unavailable" error when I try to promote Windows Server in virtual machine to a domain controller

Host: Windows Server 2012 R2 with Hyper-V and RRAS (for Internet over NAT)
VM: Windows Server 2012 R2 with installed Active Directory Domain Services
When I open AD DS configuration window (“promote this server to a domain controller”) many services and programs on my host (include Hyper-V, RRAS & Server Manager) fails with RPC Server unavailable error.

Hello Aleksandr,
There wasn't any configuration information, ipconfig /all, network setup, etc. So it's difficult to tell.
More importantly, are you trying to promote the host server? If yes, that is not advised, for one, because it's a Hyper-V server, (not suggested at all), and two, RRAS is installed. RRAS is problematic with any domain controller because it turns it into
a multihomed domain controller.
Active Directory communication fails on multihomed domain controllers
http://support.microsoft.com/kb/272294/
Multihomed DCs (with more than one unteamed NIC or multiple IPs) with DNS, RRAS, iSCSI, Clustering interfaces, management interfaces, backup interfaces, and/or PPPoE adapters - A multihomed DC is not a recommended configuration, however there are ways to
configure a DC with registry mods:
http://blogs.msmvps.com/acefekay/2009/08/17/multihomed-dcs-with-dns-rras-and-or-pppoe-adapters/
7 Reasons not to Make Hyper-V a Domain Controller
http://www.altaro.com/hyper-v/reasons-not-to-make-hyper-v-a-domain-controller/
Domain Controller as Hyper-V host
https://social.technet.microsoft.com/Forums/windowsserver/en-US/4ff14bec-a815-473b-8d2a-33e91e17197b/domain-controller-as-hyperv-host?forum=winserverhyperv
Networking?
I don't know how your networking is setup, whether there are multiple NICs on the host server, if they are teamed, if you have the host interface set to allow the operating system to share administration, or if there are separate interfaces for each. Can
the host OS ping/communicate with the DC virtual machine?
If there are more than one NIC, you have the choice to team the NICs and share the Teamed NICs for the Hyper-V OS and the VMs, or keep them separate where one is devoted for the Hyper-V OS, and one for the VMs.
Hyper-V Server VLAN Network Configuration
https://social.technet.microsoft.com/Forums/windowsserver/en-US/0aa71d2a-ebf9-4a3e-bbf5-94db55339fa2/hyperv-server-vlan-network-configuration?forum=winserverhyperv
Recommendation:
Why not just create another VM DC?
Ace Fekay
MVP, MCT, MCSE 2012, MCITP EA & MCTS Windows 2008/R2, Exchange 2013, 2010 EA & 2007, MCSE & MCSA 2003/2000, MCSA Messaging 2003
Microsoft Certified Trainer
Microsoft MVP - Directory Services
Complete List of Technical Blogs: http://www.delawarecountycomputerconsulting.com/technicalblogs.php
This posting is provided AS-IS with no warranties or guarantees and confers no rights.

How do I get RDP Access to Hyper-V host when DC and DHCP server is down and is a VM on that host.

My host machine is a Windows Server 2012 running SBS 2008 as a VM.
How can I configure a Hyper-V environment to allow me to RDP into the Hyper-V host in order to start individual VM's.
It seems that without the DC running (which happens to be a VM on the same host) the host does not have an IP address that I can RDP to. I also cannot assign it a static IP.
With the VM DC running I can RDP into that and then RDP from that to the Hyper-V host but I would like to be able to have the ability to access all VM's and be able to start and stop them as required, remotely.

The SBS 2008 server has a static IP and the NIC on the Hyper-V host is used by the Virtual Switch so a static IP cannot be assigned to the NIC on the Hyper-V host.
If you only have one physical adapter in your Hyper-V host and it's hosting the virtual switch, then you'll need to create a virtual adapter on it for the host to use.
You can check the "Allow management operating system to share this network adapter" in the "Virtual Switch Manager" inside "Hyper-V Manager". You'll automatically get a network adapter that shows up with the others on that system where you can give it IP
and DNS information.
You can also do it in PowerShell:
Add-VMNetworkAdapter -ManagementOS -SwitchName ((Get-VMSwitch).Name) -Name Mgmt
New-NetIpAddress -IPAddress ###.###.###.### -InterfaceAlias "vEthernet (Mgmt)" -DefaultGateway ###.###.###.### -PrefixLength ##
Set-DnsClientServerAddress -InterfaceAlias "vEthernet (Mgmt)" -ServerAddresses ###.###.###.###, ###.###.###.###
Then you'll have an IP you can connect to from remote systems.
Eric Siron Altaro Hyper-V Blog
I am an independent blog contributor, not an Altaro employee. I am solely responsible for the content of my posts.
"Every relationship you have is in worse shape than you think."

Loss of network connectivity at random times to guests and now hosts Server 2012 R2 Hyper-v on Dell R620...Guests virtual disks reside on a NAS.

We have set up 2 Hyper-v environments (Server 2012 R2 fully updated) on Dell R620's. The guest machines are configured do that they reside on a NAS (also a Dell R620 with server 2012). We are having an issue on both the environments where the guests will
lose network connectivity. The servers ran well for about 4 weeks and recently the guests started having issues and we have even had to reboot the host due to network connectivity problems.
We have 4 virtual switches set up. 1 connected to its own NIC. 1 for management and the 3 others for guests.
The 3 for guests are not configured to allow host OS sharing.
We do not have IP addresses on the NICS for the guests. Only on the management port. (all 1 GB NICS)
We have updated the firmware and drivers for the standard Broadcom Netxtreme cards.
We do not have Jumbo frames enabled because of some issues with switching compatability.
I've seen articles recommending to turn off TCP offloading and to disable virtual machine queues. Is this best practice?
Any thoughts of where I might look to help diagnose this issue?

Hi ,
"1 connected to its own NIC. 1 for management and the 3 others for guests."
Also you mentioned that : " is only hosting these 24 VMs ".
First please try to disable the RSS in the property of the NICs for guests .
Then run powershell " Get-NetAdapterVMQ " to check the parameter "NumberOfReceiveQueues" (NumberOfReceiveQueues – The number of queues that the NIC has available to use and assign to VMs,
the host and a default queue) .
If I understand correctly ,when you enable VMQ the number of connected VMs on that NIC should not be more than the value of "NumberOfReceiveQueues" -2 .
For details please refer to following link:
http://blogs.technet.com/b/networking/archive/2013/09/10/vmq-deep-dive-1-of-3.aspx
Hope this helps
Best Regards
Elton Ji
If it is not the answer please unmark it to continue
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.

Server 2012 R2 Hyper-V Host Loses Network Connectivity

Here's the scenario...
We have two 2012 R2 Hyper-V hosts (VM1 and VM2) in a cluster that have 8 virtual machines that live on them. The servers are each utilizing three network connections that are teamed (Switch Independent, Address Hash). They all go to the same switch.
Three nights ago at approximately 11:30 PM VM2 lost network connectivity. The server was up it was just inaccessible from the network. I could not ping in or out from it, no internet connection, yet the network connection icon did not show that it was
disconnected.
Two nights ago we had no issues.
Last night, same thing happened at 11:30 PM. VM2 loses it network connection.
The only thing that seems to fix the issue is a reboot. Once the server comes back up everything is back to normal.
Anyone have any idea what is happening here? I do not see anything that sticks out in the logs that could point me in the right direction....

Hi Sir,
Based on my experience , first you may need to keep the physical NIC driver up-to-date .
Also please check if there is "VMQ"/"virtual machine queue" property in advanced properties of physical NICs:
If yes please disable it for each team member then check the result .
Best Regards,
Elton Ji
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact [email protected] .

Can a SQL Server Failover Cluster Instance (FCI) be Implemented Between Two Hyper-V Hosted Virtual Machines?

I haven't had the opportunity to implement a SQL Server Failover Cluster Instance (FCI) for over 10 years and that was done with two physical, identical database servers way back in the day of Windows Server 2003 and SQL Server 2000 (old school).
Can a SQL Server 2008 R2 Failover Cluster Instance (FCI) be implemented between two Hyper-V hosted virtual machines? The environment in question already has Windows Server 2012 R2 Hyper-V hosts in place, so I'm just looking to see if this is even
possible and/or supported when utilizing virtual machines.
The client in question is currently using SQL Server 2008 R2 instances running on Win2008R2, Win2012, and Win2012R2, but I'd also be interested how this can be done or not with SQL Server 2012 or 2014 as well. Thanks in advance.
Bill Thacker

Yes, it can be done with Hyper-V guests. In fact, with Windows Server 2012 R2 Hyper-V, guests can use the Shared VHDX feature for shared storage used by Windows clusters. The guests can run Windows Server 2008 and higher provided that the Hyper-V Integration
Services are installed to support Shared VHDX. The only challenge here is making the Hyper-V hosts highly available as well, running it on WSFC.
Edwin Sarmiento SQL Server MVP | Microsoft Certified Master
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SQL Server High Availability and Disaster Recover Deep Dive Course

How to share file between windows server host and hyper-v windows server ??

Hi there
I installed windows server 2012 r2 as my host windows and again installed windows swrver 2012 r2 on hyper-v in one system .
now when I go to file explorer > netwrok there is no computer name to share file or folder between them
How can join both windows to netwrok place in file explorer to share file and folder
before I try windows 8 as my host and server 2012 r2 as hyper and when I went to file explorer > network there were to pc's there . first windows 8 and second win server 2012
but when both windows are server there isn't and network pc's in network location on file explorer
please help me how can I bring them both server to file explorer > netwrok
Thanks
Regards :
Raha
whit the best regard : Raha

Hi
thanks to you both
but when we install windows server as host there is not our windows in the
Internet\Network and sharing center\ ....... and in the file explorer > network
I found it when I add server host in server manager in guest server and manage it as host server user and then share files and folders from computer management and then create a shortcut from the share folder to desktop
and the did same for guest ... add guest server in server manager in the host server and manage it as guest server user and then share it's files and folders from the computer management and create a shortcut of share folder to desktop
if host windows be a client windows so this is so easy because after we install hyper-v win-server and go to file explorer > network > so we able to see both windows and all files and folders there but if host windows be a win-server we can't see them
in file explorer > network
thanks you both again
Best Regards :
Raha
whit the best regard : Raha

Ram utilization very high for SQL Server

Ram utilization very high for SQL Server

Ram utilization very high for SQL Server
Well did you searched before posting thhis question. And why do you post one line question ?
So here is one line answer This is normal behavior, make sure you set optimum value for max server memroy setting.
If you want to read about SQL Server memory
http://social.technet.microsoft.com/wiki/contents/articles/22316.sql-server-memory-and-troubleshooting.aspx
Please mark this reply as answer if it solved your issue or vote as helpful if it helped so that other forum members can benefit from it
My Technet Wiki Article
MVP

3 Node hyper-V 2012 R2 Failover Clustering with Storage spaces on one of the Hyper-V hosts

Hi,
We have 3x Dell R720s with 5x 600GB 3.5 15K SAS and 128 GB RAM each. Was wondering if I could setup a Fail-over Hyper-V 2012 R2 Clustering with these 3 with the shared storage for the CSV being provided by one of the Hyper-V hosts with storage spaces installed
(Is storage spaces supported on Hyper-V?) Or I can use a 2-Node Failover clustering and the third one as a standalone Hyper-V or Server 2012 R2 with Hyper-V and storage spaces.
Each Server comes with QP 1G and a DP10G nics so that I can dedicate the 10G nics for iSCSI
Dont have a SAN or a 10G switch so it would be a crossover cable connection between the servers.
Most of the VMs would be Non-HA. Exchange 2010, Sharepoint 2010 and SQL Server 2008 R2 would be the only VMS running as HA-VMs. CSV for the Hyper-V Failover cluster would be provided by the storage spaces.

I thought I was tying to do just that with 8x600 GB RAID-10 using the H/W RAID controller (on the 3rd Server) and creating CSVs out of that space so as to provide better storage performance for the HA-VMs.
1. Storage Server : 8x 600GB RAID-10 (For CSVs to house all HA-VMs running on the other 2 Servers) It may also run some local VMs that have very little disk I/O
2. Hyper-V-1 : Will act has primary HYPER-V hopst for 2x Exchange and Database Server HA-VMs (the VMDXs would be stored on the Storage Servers CSVs on top of the 8x600GB RAID-10). May also run some non-HA VMs using the local 2x600 GB in RAID-1
3. Hyper-V-2 : Will act as a Hyper-V host when the above HA-VMs fail-over to this one (when HYPER-V-1 is down for any reason). May also run some non-HA VMs using the local 2x600 GB in RAID-1
The single point of failure for the HA-VMs (non HA-VMs are non-HA so its OK if they are down for some time) is the Storage Server. The Exchange servers here are DAG peers to the Exchange Servers at the head office so in case the storage server mainboard
goes down (disk failure is mitigated using RAID, other components such as RAM, mainboard may still go but their % failure is relatively low) the local exchange servers would be down but exchange clients will still be able to do their email related tasks using
the HO Exchange servers.
Also they are under 4hr mission critical support including entire server replacement within the 4 hour period.
If you're OK with your shared storage being a single point of failure then sure you can proceed the way you've listed. However you'll still route all VM-related I/O over Ethernet which is obviously slower then running VMs from DAS (with or without virtual SAN
LUN-to-LUN replication layer) as DAS has higher bandwidth and smaller latency. Also with your scenario you exclude one host from your hypervisor cluster so running VMs on a pair of hosts instead of three would give you much worse performance and resilience:
with 1 from 3 physical hosts lost cluster would be still operable and with 1 from 2 lost all VMs booted on a single node could give you inadequate performance. So make sure your hosts would be insanely underprovisioned as every single node should be able to
handle ALL workload in case of disaster. Good luck and happy clustering :)
StarWind VSAN [Virtual SAN] clusters Hyper-V without SAS, Fibre Channel, SMB 3.0 or iSCSI, uses Ethernet to mirror internally mounted SATA disks between hosts.

Hyper-V Host Server RAM Utilization

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