memory oversubscribe in ESX 3.5

Similar Questions

• Average use of CPU and memory of the ESX host

  Dear team

  script of powercli necessary to fetch the last 2 month avg cpu and memory utilzaition for all ESX hosts that are managed by vcenter server.

  concerning

  Mr. Vmware

  Try something like this

  $esx = Get-VMHost
  $start = (Get-Date).AddMonths(-2)
  $metric = "cpu.usage.average","mem.usage.average"
  Get-Stat -Entity $esx -Start $start -Stat $metric | Group-Object -Property {$_.Entity.Name} |
  Select @{N="VMHost";E={$_.Name}},  @{N="Avg CPU %";E={$_.Group | where {$_.MetricId -eq "cpu.usage.average"} |
      Measure-Object -Property Value -Average | Select -ExpandProperty Average}},  @{N="Avg Memory %";E={$_.Group | where {$_.MetricId -eq "mem.usage.average"} |
      Measure-Object -Property Value -Average | Select -ExpandProperty Average}}
  

• Memory for the ESX Cluster stats | Total, Avail, allocated, used...

  Before going out and trying to write a script that does the following, I wanted to know if someone has already written something similar:

  • Collect the total amount of RAM in each
    ESX cluster less the total RAM allocated to virtual machines in the cluster.

  • For example, if
    32 GB of RAM is available in a cluster and there are four 1 GB VMs and virtual two 2GB computers running, then we have 20 GB of RAM remaining to support 20 1 GB VMs.

  • Pull the memory allocated quantity to the VMs system compared to the amount actually used as a measure as well.

  Thank you

  I don't know if you need to calculate the memory available to the virtual machines like that.

  Not all memory in a cluster is available for running virtual machines.

  And a virtual machine does not always all of the memory that you have configured with the memory available to the cluster.

  And of course, this changes over time depending on the activity of the virtual machines.

  Take a look at the total on the cluster by vm and check if the script there is no more sense to what you try to get.

• change the memory on Vsphere ESX

  Hello

  By default, vsphere uses a 300 MB for service console.

  Am I right to say that it can withstand up to 600 MB for the service console?

  In what situation do I need to set it up to 600 MB instead of 300 MB (default).

  Thank you

  A few more applications like HP, DELL, IBM management any officer.

  Thank you

  Samir

  PS: If you think the answer is useful please consider rewarding points.

• Upgrading memory on ESX 3.5 hosts

  Hi all

  We are trying to upgrade the memory of our esx 3.5 hosts.  If we properly close the guests, then we properly stop the host, will be the guests of vmotion.  According to me, they won't, but I was curious to know if it is happen.

  If the guests are turned off, then stop you hosts, there is no HA/DRS.  All guests will stay in an engine out of State until the ESX host come back online.

  If you have vCenter with vMotion/DRS, you can do a rolling upgrade.  vMotion all guests to another host in the cluster, put vacuum host in maintenance mode, it off, add RAM, if power return, exit maintenance mode.  Rinse and repeat.

• Maximum physical memory for 32 bit ESX 3.5?

  I have a deployment ESX 3.5 (update 5) with 3 servers Dell PowerEdge 2970 (2 processors AMD Opteron 2212 he x).  Each server has 8 GB of physical memory.

  However, the operating system on each ESX Server is 32 x I could really only allocate a total of 4 GB of memory and it had to be a x 64 OS for use & gt; 4 GB of physical memory. Now, I know that something is different because the VI Client sees all the 8 GB and appear to be using everything, so I guess my question is how much memory can the ESX allocate/use 32-bit operating system?

  Thank you!

  See the guide to rates

  http://www.VMware.com/PDF/vi3_35/esx_3/r35u2/vi3_35_25_u2_config_max.PDF

• Exhausted ESX host memory

  Hi guys

  I have a few 3.5u4 ESX, basically it's a Desktop Virtualization infrastructure.

  ESX hosts 32 GB of RAM

  They are now around 250 VMs on host virtual machines 40-45.

  Lately, all ESX hosts trigger alerts to RED, VMs are set at 2 GB (which I think is too much for simple office applications).

  Apart from checking if all have tools Vmare, btw how to get the latest vmware tools for virtual machines on esx 3.5?

  What else should I check on the VMS and to know why they are exhausting memory to host ESX (more than 90% of use)?

  any idea is welcome

  Thank you very much

  At the first glance, I must say that you yourself have built a time bomb.  It will explode at some point.

  The problem is, as you seem to indicate, that you have massivley on subscribed your memory.   More than 2:1.  Office workloads are difficult to anticipate.  Giving them a lot more overhead is just asking them to use it.   I know there are probably people who never use more than 250 MB of memory.  However, today it is not difficult to chew a lot more.   I know that my office, I am granted more than an "advanced user", it runs generally in the range of 1.5 to 2GB.   It is not really a way to control this in part to limit the available memory by VM or implementation of resource pools to manage.

  With regard to your specific questions.   How do you determine the versions of vmware tools?   Is not difficult.  Within the virtual Center, select the host resource or a cluster.   Then select the tab "Virtual Machines".   If it is not already displayed, right-click on one of the headings at the top of the columns.   This will bring up a menu of the available to display columns.  Select "VMware Tools Status.   This will then give you a column when you view virtual machines which indicates if the virtual machines are up-to-date with the latest version of the tools.  This will not give you specific versions.  But it will give you an idea of what day and what is not.

  Take a look at some of the other available columns and add those that make sense.  There are fields for the declaration of use of the memory.    Add them and look to see who use virtual machines the most memory.   You will need to check each of them and talk to your users to know what they are doing which requires many resources.

  You're in the political game at this point.  Have fun!

• vcHostSystem memory usage

  Hello

  I am trying to get the use of memory on an esx host, but do not get the expected results of the value:

  selectedHost.summary.quickStats.overallMemoryUsage

  where "selectedHost" is a VC:HostSystem.

  The host is connected to vCenter, but the same value is returned every time and seems to have no effect on the use of real memory on the host.

  Am I missing something here?

  Thank you

  Dave

  Just FYI: there is a bug in (previous< 4.2="" i="" think)="" versions="" of="" vco/vc-plugin="" about="" some="" performance="" counter.="" it="" seems="" to="" affect="" the="" host="" summary="" as="" well="" as="" resource="" pool="">

  But I got the words it has fixed in the current version, and I think that's also what you saw...

  See you soon,.

  Joerg

• Queries on techniques of management of memory in VMware

  Hello

  A query on techniques of management of memory in VMware:

  Suppose that my ESX 4.1 server runs on a host having 8 GB of RAM. Now I create five virtual machines with Windows 2003 guest OS and specify a reserve of memory of 1 GB. In this case, assume that I turn on all five VMs sequentially VM1 to VM5. Assume VM4 and VM5 are inactive (no activity inside the BONE invited) and VM1, VM2, VM3 run under maximum loads. In this case the VMKernel dynamically allocate the memory of VM4 VM5 of other three virtual machines running?

  I guess the real issue here is booking: 1 GB memory must be free on the host to start a virtual machine in this case. However if the guest OS is not heavily loaded would be the VMKernel still swap pages of memory to the VM slowed using memory management techniques ESX?

  Thanks, Vivek

  Suppose that my ESX 4.1 server runs on a host having 8 GB of RAM. Now I create five virtual machines with Windows 2003 guest OS and specify a reserve of memory of 1 GB. In this case, assume that I turn on all five VMs sequentially VM1 to VM5. Assume VM4 and VM5 are inactive (no activity inside the BONE invited) and VM1, VM2, VM3 run under maximum loads. In this case the VMKernel dynamically allocate the memory of VM4 VM5 of other three virtual machines running?

  Yes - is VM4 VM5 do not use the full reservation of memory 1 GB memory will be available to other virtual machines - once these virtual machines started memory bemanding memory will be recovered and given to those virtual machines

  I guess the real issue here is booking: 1 GB memory must be free on the host to start a virtual machine in this case. However if the guest OS is not heavily loaded would be the VMKernel still swap pages of memory to the VM slowed using memory management techniques ESX?

  Yes - even if the virtual machine is not under heavy load, but other VMS are it will swap memory for the by the VM vmkernel swap file

• Explicacion memoria uso

  Buenas,

  He estado con revisando bastante e afan intentando understand los contadores performance of una VM in Relación a los town of memoria. Me surgen dudas.

  Tengo bastante claro that:

  (1) granted memory = memory consumed + shared memory

  (2) shared memory = memory zero + RAM COMPARTIDA

  (3) para el valor RAM COMPARTIDA, decir memoria compartida con otras VMs utilizando deduplicacion del Page sharing sin into account areas of memory are a 0. I think it indicates no hay any contador as este valor directly.

  (4) fresh el General memory entered in estos computos.

  (5) Granted Memoria = memory total Quebec City we see in Windows.

  (6) use of memory (%) = (active memory / memory granted) * 100

  Put dudas surgen aqui:

  In este punto appears memory Active, pero...? of juego Donde entered into Active memory? ¿mediante is a shingles Memoria of consumed memory?

  He visto también that shared memory = Memoria available in en windows, pero no entiendo el concepto, realmente Hay is good RAM COMPARTIDA con otroas VMs y entiendo than esta RAM is esta utilizando y por lo tanto no estar available should...

  Spend los back puntos anteriores, entonces memoria usada, Quebec City we see in windows should be consumed memory.

  What amendments indica smell use (%) of the Memoryr? ¿quiza UN trabajo of the memoria Parâmetro? ES decir, Delcourt memoria consumida, hay una parte that're the memoria activa that esta trabajando y esta zona as realmente esta tabajando, el Memory use (%) amendments of el uso the memoria indicator?

  In the end... try expuestas.

  Saludos!

  Xavier

  VCP4 and professional VCP3 certified VMware.

  -

  ---

  If upon that esta o any other campaign respuesta ha sido utility, votalas. Gracias.

  If you find this or any other information useful or appropriate, please consider giving points. Thank you.

  Okay vamos a dejar los puntos claros tratar,

  = aquella memoria virtual shared memory (memory physics comments) that're compartida between machines virtual utilizando (GST-transparent page sharing (memoria identica) y memoria in zeros) básicamente mem deduplicada con GST y toda aquella United Nations comments that contenga zeros.

  Memory = Granted are the amount of memoria in ese momento mapeada a Máquina virtual dicha, aqui is includes fresh el General (the amount of memory needed para virtualizar dicha vm). None are memoria garantizada, TR "garantizar" estariamos spend reservaciones hablaramos.

  Active memory = aquella memoria as el vmkernel ha visto having activity recently (lectura y escritura) por lo cual no inactive esta en. El vmkernel toma and statistics of 100 pages cada 30 segundos.

  Memory zero = memoria con puros ceros, windows el momento than bootea "toca" the memoria y escribe puros ceros ella, esta memoria en forma parte Memoria compartida.

  Entonces shared memory = memory zero + GST (this is the Sección amarilla en you faltante diagrama).

  Esta imagen me I help a su momento hear a mi este embrollo:

  Granted memory = (VM1) contamos the amount of "flechas o Francisco" salen los blocks of 'physical memory comments' a los blocking "memory machine", we have 5 flechas o 5 block mapeados a United Nations blocks fisico, por ende if cada blocks of 4 KB, we have 20 KB of memory granted.

  Consumed memory = (VM1) aca vamos a count the amount of blocking mapeados, are no contamos blocking the amount of "Patio" sino, entonces, tenemos 3 blocking the VM1 mapeados "memory of the machine" (memoria del ESX/ESXi host), pero if do we have one blocks shared with the VM2, por lo tanto tenemos 2.5 blocks 4 KB as en total would be 10 KB.

  shared memory (memoria of VMS) = Aca vamos a observar both VM1, VM2 maquinas y, contamos todos aquellos blocking of "memory physics comments ' Board a UN mismo blocks in 'machine memory' (mem del ESX), entonces, tenemos 6 blocks, por lo cual 6 x 4 = 24 KB compartidos, esto, viene al nivel physical memory as basically being memoria o las guest virtual machines virtual.

  common shared memory (memoria ESX) = contamos the amount of blocked compartidos al nivel 'memory machine', we have 3 blocks compartidos por lo cual memoria compartida between todas las vms (in this case 1 y 2) of're 12KO. This is the memoria compartida directly del ESX (fisica).

  El problema as tenemos con windows y el task manager esta en when is starts windows to use mucha Memoria (the ceros llena), el caso y Québec exista recursos contencion memoria no is the quita a vm dicha, por lo cual podemos ver UN consumo mas elevado dentro del task manager mientras el consumo del en el ESX comments are mucho menor are the memoria activa ESA vm are mucho menor

  Espero acercado aclarado las dudas, este tema para mi también fue muy dificil en understand knew momento you fits as vieras siguiente presentacion del VMworld 2008

  http://www.VMworld.com/docs/doc-2353

  Saludos.

  If you find this information useful, please give points to "correct" / "useful."

  My blog virtualizacion you en idioma

• Shares of memory and CPU

  Hello everyone,

  I was wondering how actually work actions. Given that the CPU shares these MHz influence how much will be the virtual machine when hardship and access to the virtual machine at the same time the pCPUs or actions also affect the time a virtual machine to use the pCPUs to keep a VM will spend more time the execution of the instructions?

  For the record, actions, when the host has a lack of RAM, the virtual machine will receive an amount of RAM based on the actions and if it is not enough for the hot air balloon of COS and swap will take place?

  Is this correct?

  Thank you

  Dan

  the Scheduler is called vmkernel. VMkernel CPU relocates the CPU every 20ms to balance the load and serve until new instruction time slices (based on all the actions and reserves) for each workload. If the CPU is not heavily used, everyone gets the instruction time when they need it.

  for the record, based on the actions that define the priority memory ballooning will activate to provide real memory for those who need more. just as in the case of memory should be enough memory it is memory virtual swap ESX follow always pagefile in windows OS.

  iDLE-jAM | SC 2, SC 3 & VCP 4

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• Invited 3.5u4 swap ESXi host and memory size

  Hi all!

  I have VM (Debian Linux), graphs of performance on this subject shows swap use about 250 MB, real vswp file size is 1.6 G, but he came out of the guest operating system:

  Linux: ~ # vmstat

  procs-

  ---

  memory-

  ---

  -swap .

  ---

  IO- system -

  ---

  CPU-

  free buff cache r-b-swpd TR so bi bo in cs us sy id wa

  1 0 0 739896 135300 208828 0 0 2 42 20 68 1 1 98 0

  As seen, no swap no used. Why VI customer counters and swap file size differs so much use of guest operating system counters.

  Hello

  You are looking at two different levels of memory usage. VI customer, you can read information about the actual use of memory and swap ESX. It differs generally you can read from within the guest for example OS Linux. VM swap file (not asked) if used by VMkernel in situation when the assertion of memory occurs. Lack of memory is mapped in the Exchange. It is the last resort and causes significant performance degradation.

  Guest os swap is "high" this VM swap. It is entirely managed by the guest operating system. It size is based on the memory configured for VM and guest OS configuration. Only the situation when VMkernel can affect the exchange of comments is the balloon pilot. It is a breakthrough of technical recording memory that allows ESX to "say" the guest OS some free memory and use more swap file (Exchange of comments!). Freed memory can be reclaimed by VMkernel and used by other virtual machines. This driver is available for the guests with VM Tools installed.

  concerning

  Martin

• Memory usage of the host error

  I use the ESX Server. Two server giving home memory usage erro. Because of this error, virtual giving user CPU error. Server is out of control

  Plese help...

  Here's wat I did. Uncheck the option of the virtual centre for the adjustment of the advance on the esx host, that reflect the default vmkernal value.

  VMkernel.Boot.force36BitMTRRMask

  Please make sure u uncheck that and restart your host and your use of the memory on the ESX should be back to normal. This applies to all the esx servers that contains more than 64 GB of physical memory.

  Answered by:- lfchin

  1) http://communities.vmware.com/people/lfchin

  2) http://communities.vmware.com/message/998330#998330

  Thank you

  Malik Adeel Imtiaz

• On VM memory management

  I'm looking for more information on managing memory on a virtual machine.

  For example, I have a machine with 4 GB of memory assigned: no limit, no prior allocation. A lot of memory available on the ESX host

  I thought that if the machine needs of more memory, it it will capture memory available on the ESX host. If the ESX host does not have a sufficient memory, balloon pilot ESCO's memory from other virtual machines.

  And the last resort is to use the pagefile.

  Is this right?

  Thank you in advance.

  Not really - the vmkernel follows the following steps to free memory:

  1. Transparent Page Sharing - this os the abaility to vmkernels to recognize the same pages being stored by runningvirtual and storage machines these pages once in memory - when the virtual machine will worm to this page the vmkernel will make a copy of the page and the virtual machine will write to this copy - this save a bit of memory on your ESX Server.

  2. Ball - it's driver installed in the virtual machine with vmware tools - it allows the vmkernel to influence how the o/s comments uses its own virtual memory - when the vmkernel determines it is short of memory it will activate the dirver of ball in the vm forsing o/s comments to move the content of its virtual memory, which releases in turn RAM upward to the vmkernel - if the balloon pilot is not 'borrow' memory of other VMS.

  3. vmkernel swap file pervm - it is used if the first two make up free no of of memory. It is the memory of last resort and will cause problems with performance of vm. VMkernel swap file is created for each virtual machine when it is turned on and is stored in the same directory as the vmdk to boot.  Its size is equal to the mouth of the memory allocated less any reserve.

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• Maximum use memory and CPU host

  Hi all

  I have a code that gives me the average cpu, memory of a host of more 1 day use, 7 days and so on.  I want to know is if it is possible to extract the maximum value of CPU usage and the memory of a host in the previous 7 days.  I would like to integrate this in a performance report.  Average usage over a week is fine, but I want to what the maximum value of the previous week was too. If my host CPU hits above xx % at some point, I'd like to be able to see and study if necessary.

  Yes, you can get the maximum CPU usage and the memory of an ESX Server, as the statistical level that curl period is set to 4 (maximum level).

  I suspect you use the cmdlet Get-Stat with the cpu.usage.average and mem.usage.average parameters.

  For the maxima, you must use the cpu.usage.maximum and mem.usage.maximum parameters.