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cnl83Flag for United States of America

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Hyper V Machine Unbearably slow

Hyper V Machine is so slow. Its not network speed, its opening and closing applications. I have a Server 2012 Hyper V Server hosting one Server 2012 Vmachine. It started to get slow since Friday. I have rebooted and it took a long time to boot. Everything is unbearably slow.
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noci

Is there sufficient memory available on the host, in the guest?
if the disks are on external media,  what is the load to that media?...
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ASKER

Yeah there is 16GB on the host. Its one vmachine. The only thing on that particular disk is the vmachine disk.
Open Task Manager on the host then go to Resource Monitor --> Disk tab --> Sort by Total Throughput.

What's sitting up high?

At 16GB of physical RAM I suspect the host is probably running processes to the swap file.

How much vRAM is assigned to the VM?
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ASKER

Right now trying to install open manage to check the RAID. Lights on server look normal.

User generated image
Click the Disk Activity tab. What file is hogging those resources?
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ASKER

User generated image
*BINGO

The host is swapping. Reduce the amount of vRAM assigned to the VM by 1GB (requires a shutdown of the VM).
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ASKER

Ok, I will do as suggested, but how do you know its swapping? What indicates that in my screenshot?
C:\PageFile.SYS is the key.
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ASKER

Still slow,
Agree, with the swapping, you didn't mention the memory of the guest btw.
You will have to leave a few GB for the host OS & buffers etc.

So 16GB Host first try to use with 8GB guest, then if after a while (under load) there is sufficient space free on the Host you may increase the Guest a *little*.
From an elevated PowerShell please post the results in a CODE snippet to make them easy to work with:

Get-VM | FL
Get-VMSwitch | FL
Get-NetLbfoTeam | FL
Get-NetAdapter | FL

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ASKER

Keep in mind this is something that started recently. It worked fine for about a year.

PS C:\Users\administrator.mydomain> Get-VM | FL


Name             : MYSERVER
State            : Running
CpuUsage         : 0
MemoryAssigned   : 6291456000
MemoryDemand     : 0
MemoryStatus     :
Uptime           : 02:44:09
Status           : Operating normally
ReplicationState : Disabled
Generation       : 2



PS C:\Users\administrator.mydomain> Get-VMswitch | FL


ComputerName                        : SRV1
Name                                : 2017 Switch
Id                                  : bfb84556-ecbf-4f3f-8323-3e9c588671b5
Notes                               :
SwitchType                          : External
AllowManagementOS                   : True
NetAdapterInterfaceDescription      : Broadcom NetXtreme Gigabit Ethernet #2
AvailableVMQueues                   : 0
NumberVmqAllocated                  : 0
IovEnabled                          : False
IovVirtualFunctionCount             : 0
IovVirtualFunctionsInUse            : 0
IovQueuePairCount                   : 0
IovQueuePairsInUse                  : 0
AvailableIPSecSA                    : 0
NumberIPSecSAAllocated              : 0
BandwidthPercentage                 : 10
BandwidthReservationMode            : Absolute
DefaultFlowMinimumBandwidthAbsolute : 100000000
DefaultFlowMinimumBandwidthWeight   : 0
Extensions                          : {Microsoft NDIS Capture, Microsoft Windows Filtering Platform}
IovSupport                          : False
IovSupportReasons                   : {This network adapter does not support SR-IOV.}
IsDeleted                           : False
Key                                 :



PS C:\Users\administrator.mydomain> Get-NetLbfoTeam | FL
PS C:\Users\administrator.mydomain> Get-Netadapter | FL


Name                       : vEthernet (2017 Switch)
InterfaceDescription       : Hyper-V Virtual Ethernet Adapter #2
InterfaceIndex             : 19
MacAddress                 : 44-A8-42-3B-23-FA
MediaType                  : 802.3
PhysicalMediaType          : Unspecified
InterfaceOperationalStatus : Up
AdminStatus                : Up
LinkSpeed(Gbps)            : 10
MediaConnectionState       : Connected
ConnectorPresent           : False
DriverInformation          : Driver Date 2006-06-21 Version 6.3.9600.16384 NDIS 6.40

Name                       : NIC2
InterfaceDescription       : Broadcom NetXtreme Gigabit Ethernet #2
InterfaceIndex             : 13
MacAddress                 : 44-A8-42-3B-23-FA
MediaType                  : 802.3
PhysicalMediaType          : 802.3
InterfaceOperationalStatus : Up
AdminStatus                : Up
LinkSpeed(Gbps)            : 1
MediaConnectionState       : Connected
ConnectorPresent           : True
VlanID                     : 0
DriverInformation          : Driver Date 2014-12-17 Version 17.0.0.3 NDIS 6.30

Name                       : NIC1
InterfaceDescription       : Broadcom NetXtreme Gigabit Ethernet
InterfaceIndex             : 12
MacAddress                 : 44-A8-42-3B-23-F9
MediaType                  : 802.3
PhysicalMediaType          : 802.3
InterfaceOperationalStatus : Up
AdminStatus                : Up
LinkSpeed(Gbps)            : 1
MediaConnectionState       : Connected
ConnectorPresent           : True
VlanID                     : 0
DriverInformation          : Driver Date 2014-12-17 Version 17.0.0.3 NDIS 6.30

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ASKER

Everyone left for the day and now its fast again! Erggg...
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ASKER

Its slow again...
Please snip the disk activity screen right now.
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ASKER

User generated image
Doesn't look like it's working that hard at all.
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ASKER

It's working fine since yesterday evening. I don't  know what the deal is.
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