Basic principles of virtual CPU

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• Change of that flag - hot virtual CPU add

  Hello

  I'm trying to build an application that will add/remove of CPU and memory to a machine virtual a VApp.

  I currently have the code to add.

  What I need is to understand the options 'Add a virtual CPU hot' and 'Hot-memory add' how to define those who through the API? And do I need to change in order to add new CPU/memory?

  Thank you

  Hen

  Hi Henrique,

  Basically the virtual CPU/memory hot add means that modifing the number of CPU / memory of the virtual machine, the virtual machine is running.

  In the API, you don't need to set options to do - simply start the virtual machine and to try to change - even as usual editing operation.

  Note that are are some requirements to perform "HOT ADD" operations, so if some of the requirements is not fullfilled "hot add" operation will fail. For example, this feature is added in VC 4.0, so the version of the VC on which runs the cloud must be at least 4.0 VC. For other requirements on the add feature hot, you can refer to the location of the following link:

  http://www.simonlong.co.uk/blog/2009/12/09/VMware-hot-add-memory-CPU-support/?utm_source=FeedBurner&utm_medium=feed&utm_campaign=feed%3A+Simonlong%2Fblog+%28SLOG+-+SimonLong%2FBlog%29

  I hope this helps! Please write if you have questions.

  Kind regards

  Grigor

• Virtual CPU question

  Hi, I'm relatively new on VMs, but have been playing with them for about the last 6 months. I have an ESXi host that is running 4 comments VM, and I can't understand how the host allocates CPU on the host servers.

  One of the guests is a newly installed Exchange 2010 Server 2008 R2. In this guest operating system, the windows Task Manager showed that the CPU was at least a little. However, when I look at the contents of the host tab, it shows the use of the processor as the half. I thought that the host was supposed to allocate as much as necessary, but it seems to me that the host has more that's not give at the prompt. So after I saw that I configured the client to have a 2nd virtual processor, but then I read that this is not recommended. I put also the actions of CPU high for this customer. I did not have a reservation, but I was wondering if I should? I booked it 8 GB of memory, which doesn't seem to be a problem. Even with the 2nd CPU virtual, always double virtual processors poster Task Manager get maxed out sometimes, and the server can act quite slow when I'm trying to set it up, but the usuage on the host still seems low.

  I guess I'm confused, I thought the host was supposed to automatically extend the amount of resources needed a guest so that you shouldn't ever Miss unless the host itself is maxed out. Can someone explain to me the best way to set this up so this exchange area gets all CPUS, that he needs?

  Thank you!

  Hello

  The way it works is that you have a server with 1 quad not core cpu no hyper threading. This would have 4 cores to vmware to use. 4 cores is 4 virtual cpu to use at a relaxed pace. If you were to add it is 4 virtual cpu for all your virtual machines, you should be oversubscription and basically your VMs will begin waiting for the long time available CPU. You can measure with the KPI of time CPU waiting.

  When you set a reserve, say 1000 Mhz to a virtual machine, which means that there is always 1000 Mhz available on this computer from the total pool of available CPU MHz.

  1 virtual processor for a machine of Exchange 2010 is by far not enough cpu power. You do not want to give a little.

  But why you are seeing in the guest computer use at 100% is because you have allocated only 1 vcpu virtual machine, so it is only using 1 core of the CPU. If you have a quad core cpu you would probably see the ESXi host around 25% usage

  Hope this clears for you

• Why my doesn´t OS Win2008 recognizes the vSMP (virtual CPU) 6 assigned, will only recognize vSMP 4.

  Hello

  Anyone know why my VM Win2008 OS doesn´t recognize the vSMP (virtual CPU) assigned 6 and do recognize that 4 vSMP?.

  I have the correct license for VSphere and VCenter, also in the guest OS device manager, I can see the six vCPUs but in the System Properties window, I can see only four vCPUs.

  I m running on ESX 4.0

  I hope someone can help me on this problem.

  P.S. I have attached images of system properties and Device Manager

  Thanks in advance!

  Windows Server 2008 Standard(32bit)--> 4 processors

  Windows Server 2008 Standard(64bit)--> 4 processors

  Windows Server 2008 Enterprise(32bit)--> 8 processors

  Windows Server 2008 Enterprise(64bit)--> 8 processors

  Windows Server 2008 Datacenter(32bit)--> 32 processors

  Windows Server 2008 Datacenter(64bit)--> 64 processors

  VCP4 | MCITP | Master ASE | CCNA

• HT and virtual CPU setup

  We have the following server configuration (and I know it's a pretty old beast)

  ESXi 4.0 on a Dell Poweredge 1850

  CPU cores: 2 x 3 GHz Xeon

  Memory: 4 GB

  Hyperthreading: assets

  Processor sockets: 2

  Cores per socket: 1

  Logical processors: 4

  We run 2 machines on this subject. Probably 2 times Windows server 2008, but it could also be an installation of 2003. My question is, do I have to enable hyperthreading and how do I configure the virtual processor?

  At the moment we do not know how to set up. Should I activate 2 cpu on both machines, 4 cpu or just one? Or do I have to disable the HT at all? We do not know what to do with it. I don't know that the application server is not aware HT.

  I ask this to make the best use of the limited resources available to us. Buying a different server would be the best option, but it will not happen ;(

  Greetings,

  Joris

  Enable hyperthreading - it will give the vmkernel more logical processors to plan virtual processors and others have said to start with a single vCPU and only add extra if your need for and if the applications are multithreaded.

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• Equium A200-1V0: basic as a single CPU work

  I have an A200-1vo works fine, but now the only heart's work and the first is 100%.

  I am runing Vista Home Premium. Ineed help.

  Sorry, but can you confirm that the multiprocessing CPU in the BIOS is set to ENABLED?

• Limit on a virtual CPU by heart physical

  Hello

  Does anyone know if there is a limitation on the number of virtual processors per physical core proc can have in the environment?

  then you look 20 per http://www.vmware.com/pdf/vsphere4/r40/vsp_40_config_max.pdf

• Since the update to 3.1 (Windows XP virtual) CPU resources at 100% all the time

  I had the latest version works perfectly, and since I have updated to version 3.1 my Windows XP SP3 is too slow with 100% of CPU resources during the first 3-5 minutes. After this time, there is a 'system' of the process of the SYSTEM user that starts in almost 40% of resources.

  In summary, the worse performance than the previous version...

  Hello

  It is not quite normal.

  Your description makes me think that there is something wrong with your vmware-tools Setup program.

  I suggest you completely remove the VMware tools, reboot and then re-install vmware tools.

  You can take a snapshot of your VM current before that (and he commit after you complete the procedure)

  --
  Wil
  _____________________________________________________
  VI Toolkit & scripts wiki at http://www.vi-toolkit.com

  Writer to the blog www.planetvm.net

  Twitter: @wilva

• Basic Data Center Virtual Clone or snapshot

  I don't know how to do in this regard.

  I need to clone or our SQL VM that is running the database snapshot vCenter, but of course when you stop the server vCenter stops responding.  We do not have a physical SQL Server, otherwise I would have put the that vCenter db.

  can I clone it from the command-line safe?

  How can I go about creating a backup before a major upgrade of the virtual machine?

  Thank you people!

  I don't know if this is possible in ESX 3.5, because I'm in vSphere now.

  Stop your vCenter, point your VI the esx Server that hosts the VM vCenter Client. (root user name and pass) and see if you can use clone.

  It is not a best practice, and yet once again, I'm not sure if this is posible in 3.5.

  But, why not to use SQL Server backup?

  Good luck.

• Basic QS:-a virtual machine can share the memory of the 2 hosts?

  Hello

  I am very new to VMWare ESX, but looking at the docs, it seems that there is a possibility to create pools of resources by consolidating physical ESX Server hardware.

  However, it is not clear if a SINGLE virtual machine can run on multiple physical hosts?

  I have 2 physical servers:-each with 4 GB of RAM in a single pool of resources.

  Can I then run a virtual machine and assign it 8 GB? (and actually use up to 7 GB?)

  I'm güssing it is not possible to do...

  No, a guest can run on two physical hosts at the same time. It cannot use the resources provided by an ESX host.

  Resource with Betclic let you group all the resources of all ESX servers with this pool.

  Let's say you have two ESX servers with 3.6 GHz each. So your pool has 7.2 GHz available for its guests in this pool. However, this isn't a contignous resource, it is cut in two on two ESX hosts.

  Also, if you can, do not use resource pools. He must know exactly what you're doing, and it is a good source to make worse things running.

  The best resource on hand programmer is ESX itself. If you have a license to DRS use. According to our experience, it is very good by spreading the load on your ESX farm. If you want to set restrictions to the guests I would level comments.

  If you found this information useful, please consider awarding points to 'Correct' or 'Useful' answers and answers. Thank you!!

• Help me understand a basic principle of scripting languages

  Basically right now im setting the functions that I use throughout the application outside of functions, example:
  ------------------------------------------------------------------------------------------ ------------------
  var urlReq:URLRequest = new URLRequest ("music.mp3");
  var s:Sound = new Sound();
  
  private function initApp (): void
  {
  s.addEventListener (Event.ID3, onID3InfoReceived);
  s.Load (urlReq);
  }
  ----------------------------------------------------------------------------------------- -------------------
  
  However, this seems sloppy for me and I get warnings of Flex, I need to use these vars in other functions in the application, but if I set them in a function, so I can't access it again, can someone please show me the ideal way to deal with this problem?

  Sorry, you must use the above code outside of your duties, but inside your mx:Script, or if you use an external one too, and then personally at the top under your imports. It is here that I like to keep them.

• function in virtual bench generator does not properly

  Hi all

  I will start this post by saying that I am a mechanical engineer, and even though I'm familiar with the basic principles of electric, I'm not an expert. With this in mind, please expect a certain level of ignorance and naivety on my part. Now, to my question...

  I recently bought a virtual bench because he seemed to be the ideal option to give me some basic features for my electronic projects. After the unpacking, I tested each of the functions and was pleased with what he could given my needs. Currently, the function generator gave a solid signal and consistent. However, now that I use the function for a project generator, is no longer gives me a compatible signal. When I read the signal to the channel amplitude of the wave grows and shrinks at random, and the signal moves left and right erratically. Can anyone think of what could be causing this? As far as I know that I have done nothing that would have harmed it, but then again I am a bit of a novice when it comes to this, and I'm afraid that I broke this unit in less than a week. Reactions of this community would be greatly appreciated. Thank you!

  It is possible that the signal is an alias for the scope, what happens when the unit is at a high frequency, but the scope is at a low sample rate and so he can'f fully grasp the waveform.

  In this case, what happens when you click on the button "Auto" on the bezel at the top left? If the behavior corrects itself, aliasing was the problem. If it's still broken, please share a screenshot or a gifthat you see.

• High SWCUR - almost all virtual machines

  Hi guys

  I'm having some problems specifically with two linux machines (running on ESX 3.5 update 3)

  1 Suse Server 11-4 vCPUs - 6 GB - running Lotus 8.5. Question: Mail sometimes spins very slow service and the VM needs to be restarted

  2 Suse Server 10 SP3 - 4vCPUs-4 GB - running DB2 9.7: from: DB2 process using too much CPU and dies just VM must be restarted.

  Doing some troubleshooting I found this

  I'm amazed that basically all my virtual machines have a SWCUR high (like 10 running Suse and other W2003 - W2008) and 2 VMS with questions show a few SWTGT and one of these cables in STEEL (VMs highlighted in red)

  the most important to note that when I took the screens, they are even served as the company works not the weekend

  

  

  any idea guys what could be happenning?

  Should I update to a more recent update of esx 3.5 as 5?

  a few recommendations for Suse 10 o 11?

  Thank you very much

  It is no constraints memory going on at the time specific where your screenshots have been taken, but my guess is at some point, that the host got low on memory.     Here are two articles of really good blog on memory esxtop page which is very useful

  http://www.yellow-bricks.com/2010/06/10/is-this-VM-actively-swapping-helping-heiner_hardt/#

  http://frankdenneman.nl/2010/06/memory-Reclaimation-when-and-how/

  If you have found this device or any other useful post please consider the use of buttons useful/correct to award points

• 3.1.0 - high CPU usage

  Just updated to VMWare Fusion 3.1.0 for Mac.

  Running Windows XP SP3 on MBP 2.4 GHz 2 GB mem w and Mac OSX 10.6.3

  Immediately noticed an instant increase in CPU CPU time use (vmware-vmx constantly about 20% with spikes to 35-40%) has increased and the fan speeds.

  Termination of ZoneAlarm has the CPU usage down to 10-15%

  Restart the tips of ZoneAlarm and CPU for 150-200% then quiet until 25-80%

  Is there a setting that I need to 'tweak '?

  Help appreciated.

  I also had this problem with ZA on Win7.  Ended up uninstalling and just the basics of Microsoft security running.  Make sure you have only 1 virtual CPU that is configured in the virtual machine, and also if you have AVG, uninstall.

• Help: CPU virtualization

  I need to understand the actual virtualization CPU numbers in ESX / ESXi solution. Plaintext:

  1. If a virtual machine is running on 2 or 4 virtual processors, it uses the number of physical processors on the physical host. The computer physical host has 8 processors.

  2. how the virtual CPU concept works.

  3. how to measure the performance of CPU virtualization in real-time and followed on a virtual machine CPU performance state.

  Thanks a ton.

  A virtual CPU will only run on a CPU physics skirts or so basic at the time.

  1. So if you have 8 physical processors in single base - a dual vcpu runs on 2 pcpus - a quad vcpu runs on four processors. If you have a quad dual core (8 cores) processor the vm dual vcpu runs on 2 hearts who may find themselves on the same physical processor and quad vcpu virtual machine runs on 4 cores that could be located on the same physical processor

  2. The vmkernel (what does virtualization) is planning the virtual processor to run on a cpu or a core - physical

  3. The typical metric used to determine if there are problems with your ESX Server cpu performance is ready time - measurement of the time that the VM's virtual cpu is waiting to be programmed on a physics/core processor.

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