Memory usage of Virtual Machine

Similar Questions

• Max memory to a virtual machine when only running on a host?

  Hello

  I have a 4 ESXi host with 65522, 60 MB of RAM as reported capacity.

  I have a single VM RHEL 6 64-bit running on it.

  It is possible to allocate 65524 MB RAM to it, and I did.

  Is this correct? I guess that the host system needs little RAM too, and by assigning all the RAM to a virtual computer, one wonders where the host system gets its RAM from?

  Everything works, but I wanted to make a clear, if someone can help bring me some light on that?

  Hej Ko,

  you could for example in ESXi approve your memory, running 10 virtual machines with 8 GB of RAM on your specific host. ESXi has some management techniques of memory to manage the most effective possible RAM, however if all your virtual machines (or in your case your single VM) would really need all RAM then it does not fit into physical RAM and should be handled by a few different ways, but could end up with what we call vmkernel swap = poor performance.

  For your virtual machine, it is probably better to put in something like 62 GB or similar, as this makes the ESXi host operating system and all your VM fit RAM completely.

• How can I pay for the reservation of memory on all virtual machines to "0"?

  I am trying to write a script that will pay for the reservation of memory on all virtual machines that are invited in a cluster to '0 '.  We have book too much memory, and this setting should allow VMWare facilities manage reserves memory for me.  I have hundreds of virtual machines to update, so I can't do it by hand.  I hope that it is possible via the CLI.

  Can someone help me with this please?

  Matt example work certainly, and I'm sure that he was going to follow up with something similar to this after having confirmed if it worked or not because it is much more serious on the optimization of code for speed, but I'll (try to) save the effort. To test its extract on a cluster of 45 VMS, it took more than four minutes to complete.  The excerpt below took about 25 seconds.  The difference is of course to use the cmdlet "Get-View" and that it can run asynchronously so (it begins a vCenter task and immediately passes the following).  Of course, this will also put more of a strain to your vCenter server, so keep that in mind.

  $spec = New-Object VMware.Vim.VirtualMachineConfigSpec
  $spec.memoryAllocation = New-Object VMware.Vim.ResourceAllocationInfo
  $spec.memoryAllocation.Reservation = 0
  Get-Cluster "YOUR_CLUSTER" | Get-VM | Get-View -Property Config.MemoryAllocation | %{$_.ReconfigVM_Task($spec)}
  

• Memory of the virtual machine in Windows 2008 32-bit Aignesberger.Software.website.Watcher.2010.busines

  Dear all,

  I installed the virtual machine with Windows 2008 32 Bit Standard Edition. Compact, his oar was 2 GB at this time there, everything was fine, I increased the ram to 4 GB. Now my Easerver 6.3.1 got crashed and pursuant to the original agreement we also reinstalled/reconfigured EA server, but it is always showing 2048 MB of memory instead of 4 GB.

  
  

  2554-11-08 13:09:17.733 INFO wire-34 after USER ID = Adeelme:cms
  Type of Message 2554-11-08 13:09:17.733 INFO wire-34 = Debug
  Virtual memory use Java ScheduledTask:Dump60SecondMemoryUsage [CheckMemoryUsageTask] INFO-2554-11-08 13:10:00.046: 19% (94/264/494 MB)
  Virtual memory use 2554-11-08 13:10:00.046 process of ScheduledTask:Dump60SecondMemoryUsage [CheckMemoryUsageTask] INFO: 98% (2016/2047 MB)
  Virtual memory use Java ScheduledTask:Dump60SecondMemoryUsage [CheckMemoryUsageTask] 13:11:00.051 INFO-2554-11-08: 21% (104/264/494 MB)
  Virtual memory use 2554-11-08 13:11:00.051 process of ScheduledTask:Dump60SecondMemoryUsage [CheckMemoryUsageTask] INFO: 98% (2016/2047 MB)
  2554-11-08 13:11:15.000 INFO component/method name Thread-34 [JaguarServer] = n_app_controler/of_getapplication

  Type of Message 2554-11-08 13:11:18.631 INFO wire-34 = Debug
  Virtual memory use Java ScheduledTask:Dump60SecondMemoryUsage [CheckMemoryUsageTask] INFO-2554-11-08 13:12:00.052: 14% (74/264/494 MB)
  Virtual memory use 2554-11-08 13:12:00.052 process of ScheduledTask:Dump60SecondMemoryUsage [CheckMemoryUsageTask] INFO: 98% (2016/2047 MB)
  

  Thank you

  Adeel Imtiaz

  Yes - you can
  but that will make your VM very slow

  set
  prefvmx.minVmMemPct = "50".

  or less - allowing you to approve the RAM
  Set this parameter in your config.ini file

• How to get memory for a virtual machine?

  Hi all

  In vSphere Client > select a virtual machine > summary under general tab, shows:

  Guest OS: Windows XP

  VM version: 7

  CPU: 1 vCPU

  Memory: 1024 MB

  General memory 103,58 MB

  With PowerCLI, how to recover this figure "103.58' for VM 'vm123 '?

  Concerning

  marc0

  You can get the overhead of the memory of all your virtual machines with:

  Get - VM | Select Name,@{N="MemoryOverhead; E={$_. ExtensionData.Runtime.MemoryOverhead/1MB}}

  Best regards, Robert

• Cannot allocate more memory to the virtual machine image

  Hello

  I am currently using VMWare Workstation 5.5.4.  I have a Win XP image that I run.  My host computer has 4 GB of ram (3 GB recognized by hospitality Windows OS).

  Currently, I am only able to allocate a maximum of 1 372 MB to my virtual machine Image.  I want to allocate more memory to my image, as I do more memory intensive tasks to my image.  If I try to increase the amount of memory (even to 1376 MB), I get the following error message:

  

  Any ideas on how I can increase the amount of memory I can attribute to my image?  I use only 1 image currently.

  Loking at your vmware.log file, I see that you have a section "DEFAULT USER" including a "prefvmx.allVMMemoryLimit = line 1429". I believe that it is in conflict with the ' SITE HOST/DEFAULTS ' section which specifies "prefvmx.allVMMemoryLimit = 2297".

  The ' HOST/SITE DEFAULTS' config.ini is the traditional config.ini file that people recommend that you edit.  On XP, it should be located in C:\Documents and Settings\All Users\Application Data\VMware\VMware Workstation\config.ini

  I can't tell you exactly where the file config.ini 'DEFAULT USER' is located on Windows XP as I am running Vista.  I would start by looking under C:\Documents and Settings\\Application Data\VMware\VMware Workstation\config.ini to see if this file exists.  Or you can search your hard drive a config.ini file that contains the 'prefvmx.allVMMemoryLimit = 1429"line.

  I would recommend not not using the "DEFAULT USER" config.ini file at all.  In fact, on a default installation of Workstation 6.5 this config.ini file does exist.  I would recommend so transfer config.ini 'DEFAULT USER' settings to the "HOST/SITE DEFAULTS' config.ini and then delete the file config.ini 'DEFAULT USER '.

  After this is done, try again and let us know if things work better.

• Use of memory in the guest virtual machines

  Hello

  I don't have any background on VMware technology, but we are using a facility of dynamic cloud based on vCloud Director to the company where I work.

  The group that operates the server publishes the offer with a 'pay per use model"of service.

  This is true for the CPU resources, as we pay only what we use in the month. But in my opinion, it does not for the use of the RAM.

  We have Linux VMs that allocate a 4 GB of RAM 'physical' and our monthly bills show that the RAM usage is at 100% for all the month. But when you look at the tools of memory for the virtual machine, you can see that most of the time 50% or even less is used by the guest operating system process.

  This means from a user perspective the RAM price per month should be half of what we are responsible now. Ask operators on the 'question', we always get the answer that the use of the RAM is not dynamic and we need to pay for the use of 100% from the point of view of the server host.

  Could someone share some light on this subject? Is there really no way to make use of the dynamic RAM as the CPU usage?

  Thank you

  Michael

  Evening,

  As a service provider, I'll let you in on the secret:

  It depends on

  vCloud takes care of three models of default allocation.  Your provide may use other

  -Pay for what you use. -pay as you use

  -Allowance - you get resources, but can burst more

  -Booking - you get allocated resources and is

  Chargeback depends on model (in out of the box chargeback... your provider might have something custom)

  Pay as you use - charged on the basis of the resources used

  Allowance - remuneration based on allocation and additional for burst

  Allocate pay based on booking-

  There in the last two models really no way to load except full allowance (i.e. 100% cpu and RAM)

  Statement, I think you have something along the lines of the compensation you are using you mixed with a price system vendor.

  From my experience the resource more used in ESXi clusters in the RAM.  That's really what I buy in clusters of resource... I always need more RAM.  I need no more CPU. In addition, distribution of the CPU to vcloud is made via Ghz is not CPU.   RAM is allocated by GB.   So those set up and I think you suppliers is betting that they will always have to RAM so they charge based on usage not allocation.  While CPU, they have tons while they charge by usage.

  Really, it's just my thoughts... What can charge you on:

  -Ghz processor

  -GB of RAM

  -GB of storage

  How can recharge you:

  -Used

  -Allocated

  So bottom line... they can charge by opportunity they choose not too...

  It will be useful,

  J

• 12 GB of RAM is "not enough physical memory" for a 2-GB virtual Machine?

  I run VMware Player 6.0.3 on Windows 64-bit 8.1. My host has 12 GB of physical memory and my virtual machine uses 2 GB memory. And yet, I can't start my VM because VMware has said "not enough physical memory is available to power on this virtual machine with its configured settings".

  According to the Windows Task Manager, only 15% of my physical memory is reserved for the current enforcement process. So, how is it possible that I don't have enough RAM to run my virtual machine?

  This is a known issue!  Take a look at: (workaround in) Re: 8.1 Windows October rollup KB2995388 and problem with 10 Workstation

  Also take a look at: Windows 8.1 October rollup KB2995388 and problem with 10 Workstation & Microsoft Patchday's and ' not enough physical memory is available to power on this virtual machine " & 14 October patches for WIndows 64 bit 8.1 breaks VMWare player 6.03

• Settings of CPU and memory of reserve on the virtual machine running...

  Hello.

  I have two virtual machines in production with CPU and memory settings of reservation applied as shown below. I want to adjust these settings of reservation to "zero" for the CPU and memory on both virtual machines.

  I can make these adjustments while VMS are running, or do I need to power their first?

  Any advice would be appreciated.

  Thank you!

  

  

  Welcome to the community,

  Booking of resources being completely transparent for the customer, i.e. a host function, there is no need to turn off the virtual machines. Basically all settings in are available to be changed in the editable GUI generally without interruption of service comments.

  André

• How to use a virtual machine that requires more physical memory that I have?

  A colleague send me a Linux VM, he built on a machine with much more physical memory 4 GB I have in my Macbook Air.  When I started the virtual machine in Fusion, he said that the more physical memory virtual machine that I had and suggested that this would reduce the memory for the virtual machine to 3 GB.  I said OK and the machine started.  I did a lot of work in this virtual machine.  I suspended the VM because I needed to recover a portion of memory that he used for another application.

  When I try to start the virtual machine now, it says that it requires 4 GB of memory and that I should quit some applications or restart to free the memory required.  I tried both without success.

  Why the parameter / 3GB was not recorded when I suspended the VM?

  Given that I can't change the memory required for the virtual machine until it is properly closed and since then I can't stop the virtual machine without unsuspending it, I suspect that the VM is toast.

  Is it possible to recover the virtual machine?

  With VMware Fusion closed, you can remove the file from .vmss to to reset the VM to a shutdown state.  Note that whatever it is not recorded when he was suspended will be lost.

• VMware Workstation 6.5 - not enough physical memory is available to power on this virtual machine

  My host is a processor Intel Core i5 (active VT) and 8 GB of RAM Windows 7 64 bit running with hardware virtualization enabled.
  
  Apart from McAfee Antivirus and the usual Windows updates, no other software has been installed on the host machine.
  
  I am running Vmware Workstation 6.5 and I installed 3 popular VM with below guest OS, s/w and memory:
  
  VMware ESX 4-2 GB
  Server 2003 (DC and DNS) - 1 GB

  Server 2003 (vCenter Server) - 1 GB
  
  However, it is not possible for me to all 3 virtual machines run simultaneously. If I turn on Vmware ESX 4 and try to start Windows 2003 VM, it displays the following message:

  Not enough physical memory is available to power on this virtual machine with its configured settings.

  To resolve this problem, set the parameters in additional memory to allow for more virtual memory machine to swap.

  If you were able to on this Windows virtual machine on that host computer in the past, try restarting the host computer. Reboot may allow you to use a little more memory host to run virtual machines.

  Can you get it someone please let me know where are the rest of the memory is busy? Size of total memory of 3 virtual machines are only 4 GB and I have to be able to run all the VMs set 3, but in this case I can't even run two virtual machines simultaneously.

  Please help what should I do?

  With 8 GB of RAM on the host allowing why only 1 GB to be reserved for all you run virtual machines?

• How to change the memory allocated for VCenter server, which is a virtual machine

  I'm trying reclassification of 3.5 to Vsphere 4.1 and I improved VCenter first, making it a virtual machine.  However, when I created the server I did not allocate enough memory for it and I'm getting errors.  How can I allocate more memory for the virtual machine while it is stopped?  I can not allocate more memory, except if it is closed, but with it being the VCenter server if I stopped him so that I can access with the Vi client.  Is there a service console command?  I searched for a few hours and found nothing.

  Thank you!!

  Discover what the vCenter ON WHAT VM ESX host is marked (e), connect directly to the ESX host and find the vCenter VM and make the change.

• Required physical server Vs Virtual Machine memory

  Is there a white paper explains why we we need less memory in the Virtual Machine as compared to the physical Machine.

  The problem is that my boss wants to know why this is so. It is very difficult for me to explain this to him, he wants to see a white paper OR some article on the internet.

  As long as a VM administrator, I know that we can add and remove a virtual computer memory but it will be not that simple when it comes to physical servers. I suggested to him that we must follow a standard, and if there is a requirement for business we can increase or decrease is according to the needs. So when the salesman comes in they give us specifications for the physical server and not the virtual and there is always an argument that why should have 6-8 GB memory VM from the outset. In order to avoid everything that the arguments it needs more proof.

  Thank you

  Here is a simple explanation of why VM need less memory.  Transparent page sharing.

  If you install a virtual of Windows 2008 SP2 single server machine, lets assume that it uses 500 MB of RAM while sitting idle.  It's basically all running components loaded into memory.

  If you then put a same VM, the new machine virtual don't re-charge not the exact same components in memory.  ESX will see the same exact memory block has been loaded into the memory of the host Server1 (phyiscal material) and then simply point the virtual machine to the component already loaded into memory.

  After the virtual machine has been loaded and GST has kicked, you will probably find that for 2 identical virtual machines you use not only 650MB of memory (not 1000 as expected).  This is because 80% of the components has need of the new virtual machine, it only uses the existing memory blocks, instead of duplicating.

  Now, repeat this operation on 10 VM and assume only 50% of the memory is the same between them... it is still a huge economy of memory.  In this case, since each VM Windows is really loading only 250 MB of itself in memory and split the rest, technically you don't need to allocate 2 GB of RAM for each virtual computer... you can easily get away with putting 1 to 1.5 GB on this server and I have always the same ratio of available memory for the programs that you would do if it was a physical server.

• Reservations on each virtual machine

  Why is it a bad idea to have reserves of CPU and memory on each virtual machine in a cluster? I'm trying to find more information. This is a good answer. I would be grateful if anyone can provide additional information on this topic.

  Setting memory reservation affect the virtual machine and its surroundings. Definition of reservation by virtual computer is not recommended; It is advisable to create pools of resources instead of by M V reservations. Reservations of setting at a granular level leads to an increase in administrative costs and operational overhead. But when the situation requires to use a booking of VM, how a reservation is adjustable to ensure performance as well as possible without losing the physical memory and also less impact as possible. The answer: define a reservation equal to use memory average of VMS comments.

  Pasted from <http://frankdenneman.nl/2009/12/08/impact-of-memory-reservation/>

  Reservation on each machine virtual is a bad idea because you are guaranteeing resources to guest, regardless of usage.

  For example. You guarantee 4 GB of RAM to a virtual computer, but using only 2 GB, 2 GB of physical RAM that could be used by other virtual machines running in this case you lose.

  It's a good idea in case you know the use of the virtual machine is high and it would take resources guaranteed to continue to work effectively

• How much space does need a virtual machine?

  Assuming that I have 100 VM Windows of 40 GB each on my data store, would I need 3.9 TB on my store data to account for all these virtual machines?

  I guess not, but how do I know real space?

  It is an appropriate approach.the 320 is the memory usage for all machines that I guess the 320's for all machines you will be virtualized.

  350 GB should be fine however with Exchange and SQL and their abiilty to spike, I would consider not to cut then station-may be looking at 512 GB -.