Configuring SP13 to use dynamic memory

I am aware that SharePoint 2013 does not support the use of dynamic memory due to "certain applications" that need fixed memory allocation. The only example that is ever offered of one of "these applications" is the Distributed Cache.
All well and good, I totally understand the requirement and rationale behind it.
However, what if you have the Distributed Cache running on only one server in a multi-server farm? Let's say we have a 3-tier farm: SQL, APP, and WFE. APP is configured to serve the Distributed Cache and other services, while the WFE serves only web pages.
Could the WFE server in this scenario be configured w/ dynamic memory?
Finally, documentation always says things like "certain applicationS", but only ever specifies the one DC service. What are the other services that require a fixed memory allocation? I've heard Excel Service and Search, but can't
find documentation to back that up.
Thanks for your thoughts.
Brandon Murray

Search is another application which is impacted by dynamic memory. But if you run this way, you will be considered unsupported (which means Microsoft will support you up until they identify dynamic memory as being an issue).
Trevor Seward
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This post is my own opinion and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.

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Using Dynamic Memory Management

Hi All,
http://technet.microsoft.com/en-us/library/ms178145(v=sql.90).aspx
I have red the above article regarding Dynamic Memory Management and now I just want to check whether this option is enabled in my environment or not.
Is this by default enabled in the server or else Please suggest on how to achieve this
Regards,
Kalyan
Grateful to your time and support. Regards, Shiva

Is this by default enabled in the server or else Please suggest on how to achieve this
Regards,
Kalyan
Grateful to your time and support. Regards, Shiva
If you read the first line of the link you posted its clearly written SQL Server memory management is dynamic. You cannot change it . You can just restrict buffer pool usage by puttling limit on MAX Server memory. In that case as well SQL Server might cache
all Buffer pool memory.
Event though you cap max server memory still direct memory allocations for large pages will be done directly by windows API and that will also come under SQL Server memory utilization
In short SQL server memory allocation is always dynamic you cannot change it
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 Articles

Dynamic Memory in the production environment

Hi,
We configure all production VMs with static memory on Hyper-v 2012
we need to make sure there is no negative impact on VM performance if we use Dynamic memory , as we read for 2 years
not recommend to use dynamic memory in the production.
I preferred the answer with Trusted URL
Ramy

Hiya,
The best answer you can get is, that it is dependent on the application running on the server O/S.
The reason that dynamic memory is not recommended for production environments, is that many applications are not supporting it. That is usually seen on memory intensive applications(SQL is an example) or simply because of caching types of functions. (SharePoint
is an example).
The major concern here is when VM's are decreasing the memory for a VM, the application does not understand this. Usually it is not a problem when increasing the memory. - Again it will depend on the application.
Think of it as hot swap memory and how you used to use that in the physical machine days.
Also when there is not adequate memory, operating system will use paging. Paging uses disks and disks has a lower access time than memory.
In general dynamic memory is easier to control than dynamically expanding disks, as you can set the buffer size of the memory, which is still not available for the dynamic disks.
Besides the above, the following links states:
"Workloads that are not NUMA-aware will not take advantage of virtual NUMA. However, the guest operating system may perform some NUMA optimization. Enabling Dynamic Memory (therefore presenting only a single virtual NUMA) should not cause performance
degradation"
http://technet.microsoft.com/en-us/library/dn282282.aspx

Windows Server 2012 HyperV Cluster - Dynamic Memory Config

Hello There,
I am about to configure two node HyperV Cluster on Windows 2012 R2.
There is 192 GB RAM on each node but my VMs requirement is around 216 GB but some VMs doesn't require the full memory capacity all the time so in this scenario what is the best method to use dynamic memory utilization.
RAM
48 GB
48 GB
16 GB
48 GB
48 GB
8 GB
I need to provision 6 VMs with the above memory config but want to utilize it effectively through dynamic memory, please suggest.
I don't need the full RAM capacity all the time as in the table.
Thanks,
maqsood
Maqsood Mohammed Senior Systems Engineer MCITP-Enterprise Admin & ITILv3 Foundation Certified

Of course you can, this is the aim of the dynamic memory feature.
In the VM's memory configuration, you will find three parameters:
Start up RAM : This is the memory allocated to the VM when it's started
Maximum RAM : This is the maximum amount of memory that a VM can request from the Hypervisor. If there is available memory the host will grant it more memory, if not, the VM will not receive memory
Minimum RAM : Because the memory configuration is dynamic, when a VM will not use memory, it will give back its memory resources to the host, but it will never go down its Minimum RAM value (The total minimum RAM of all VMs can never exceed the available
memory, otherwise the VMs will not even start)
And there is the Priority option that tell the hypervisor which VM to satisfy first.
Look here for more explanation
Regards, Samir Farhat Infrastructure and Virtualization Consultant || Virtualization, Cloud, Azure ? Follow and Ask here https://buildwindows.wordpress.com

Problem in dynamic memory allocation

Hi,
My name is Ravi Kumar. I'm working on a project to improve organizational performance which include visual studio for simulation. I'm using dynamic memory allocation to allocate space for the array that are used in the program. Now I have run-time error
which I can't understand where it is going wrong. Can someone please help me regrading this issue.
If anyone interested in helping please leave a comment with your email id so that I will share the whole project folder.
Thanks,
Ravi

Hi Ravi,
Don is right that this is the forum to discuss questions and feedback for Microsoft Office client.
Please post in MSDN forum of Visual Studio, where you can get more experienced responses:
https://social.msdn.microsoft.com/Forums/en-US/home?forum=visualstudiogeneral
The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us. Thank you for your understanding.
Regards,
Ethan Hua
TechNet Community Support
It's recommended to download and install
Configuration Analyzer Tool (OffCAT), which is developed by Microsoft Support teams. Once the tool is installed, you can run it at any time to scan for hundreds of known issues in Office
programs.

Hyper-V 2012 R2 - live migration dynamic memory issue

Hi..
we use a two node hyper-v cluster.
On each node running 5 vm that shared the 64GB system memory.
The vms are configured to use dynamic memory. The sum of the startup (min) memory of the 10 vms are currently 50 GB.
So now our problem:
If we try to drain roles on node A for maintenance purpose two vms are still on node A because they wasted currently each 25GB memory and so on node B is not enough free memory to host this vms.
That sounds logical
But as all vms configured to use dynamic memory they should shrink their memory to get enough space for all vms? If we shutdown all vms, move it to one node, then everything works fine.
Is it by design that live migration do not trigger the vm to shrink their memory?
Best regards, Alexander Zirbes

Hi Alexander,
Dynamic memory means that memory can increase or decrease based on the demand of the VM, not based on the load of the Hyper-V host. If the gust OS of VM dont need that much memory, memory will be released. I dont think live migration has any role shrinking
the allocated memory of a VM.
Since you are using two node cluster, you should only load 50% resourses on each host so that incase of a failure of second node, the first node can have all the VMs.
This calculation will become more effective if you have more nodes. I am having a six node cluster and I load each host upto 80% so that in case of a single node failure, the VMs can be split on other five nodes without issues.
Cheers,
Shaba
Optimism is the faith that leads to achievement. Nothing can be done without hope and confidence.
InsideVirtualization.com

Exporting snapshotted VMs and dynamic memory

We have a production VM which uses dynamic memory. Unfortunately, someone decided to snapshot this machine and now we cannot export the VM using the hyper-v "Export" facility.
Export gives a warning message indicating that VMs and snapshots cannot be imported into Server 2008R2 and that dynamic memory must be turned off prior to exporting. Here's the message:
I can turn off dynamic memory in the main VM but each snapshot has its own setting for dynamic memory. I can see the setting, dynamic memory is on but it is grayed out.
As a backup, I want to export the VM prior to merging the snapshots. How can I do this?
Thanks,
Alan
[email protected]
Alan MacKenzie [email protected]

Yes, you cannot import to Server 2008 R2, you can only import to Server 2008 R2 SP1 or newer.
You cannot go backward in the version of the hypervisor, that is what it is warning about. It is not a block, it is just information. You can still Export and Import (if necessary) to a 2008 R2 SP1 or 2012 machine.
In regards to the snapshot. That is a different issue. Simply delete the saved state portion (the running memory part) of the snapshot.
Brian Ehlert
http://ITProctology.blogspot.com
Learn. Apply. Repeat.
Disclaimer: Attempting change is of your own free will.

[2008 R2] Hyper-V Dynamic memory warning with half of vHost memory free

Our virtual server host system has about 19GB of Memory free (out of 32GB total), yet a virtual guest using Dynamic Memory was only being assigned 8GB and the demand was around 13GB, therefore generating a Warning state on the Memory Status. Logging onto
the guest machine showed about 8GB of memory being used as well. The end-users were receiving memory errors in their applications. Any idea why the guest system was in this warning state?

There is a perception in the OS. And different numbers come from different places.
In a nutshell, the RDP Server has a memory leak if you constantly disconnect and reconnect - and it ends up chewing up memory, but when available memory is tested this memory consumption is missed. If you logout of the RDP session instead of disconnecting
then the memory is given back and can actually be used.
It is a strange interaction with RDP that has been there since the original release. But it is specific to using RDP to connect to the Hyper-V Server for VM Management and disconnecting without ever logging out.
There was also a google process that many folks reported a long while back that caused memory consumption that prevented VMs from starting as well.
Brian Ehlert
http://ITProctology.blogspot.com
Learn. Apply. Repeat.
Disclaimer: Attempting change is of your own free will.

Office 2001/Dynamic Memory?

Do the programs in Office 2001 have Dynamic Memory while using OS 9.2?

Hi, HappyWarlock -
Welcome to Apple's Discussions.
Do the programs in Office 2001 have Dynamic Memory while using OS 9.2?
Probably not. I don't use Office, but the vast majority of programs in OS 9 do not have the ability to use dynamic memory allocation; a couple of exceptions are the OS itself (Finder), and SimpleText.
You can change the allocation for the programs in Office manually; the number to change is the Preferred allocation amount.
Article #18278 - Assigning More Memory to an Application

Hyper-V, Dynamic Memory, Memory Demand more than Maximum memory

Hi,
I have found that for some VMs Demand Memory more that Maximum Memory set.
Where can I found any documentation about this?

A VM can 'demand' more memory than is possible'
But it will never actually be given more then the maximum.
In the VM the application is asking for more RAM from the virtual memory manager of the OS in the VM (not to be confused with any memory management that the hypervisor is doing).
When the VM hits its Maximum setting it is no different than a physical machine hitting its physical RAM cap - the OS begins paging to give the application the additional RAM it is asking for.
It simply means that you have a greedy application. SQL and the Exchange mailbox role have a long history of being very greedy applications (SQL made many changes to work in concert with dynamic memory) - taking all of the RAM they could get.
In your case, you have a startup of 32GB a minimum of 24GB and a Maximum of 36GB. And the application in the VM would 'like' to have 54GB. If you look in your VM OS you will probably find that it is paging to disk.
What is your allocation setting? The default of 20% Higher?
Personally - I see little value in using dynamic memory with such a small window of difference between the startup, minimum, and maximum. It is as if you are trying to micro manage the feature, instead of allowing the feature to work as designed.
Dynamic memory is designed to balance RAM between all of the VMs on a particular hypervisor at the same time. And to allow use of all the RAM the machine has, if there is a workload that can use it. If the VM wants 64GB, why not give it that.
Dynamic memory will not starve other VMs to give this VM more RAM (unless you give this VM a higher priority). But it will take RAM away from a VM (if absolutely necessary) to allow another VM to meet its requirements.
Any VM is always guaranteed its startup, at boot time. And dynamic memory will not starve it below it minimum - and if the VM is not using RAM it will take RAM away down to the minimum. And a VM will never be given more than the maximum, even
if the VM wants more.
Brian Ehlert
http://ITProctology.blogspot.com
Learn. Apply. Repeat.
Disclaimer: Attempting change is of your own free will.

How to configure Oracle 10g to use 4GB memory

I'm trying to configure Oracle 10g to use >4GB memory. Have configured server boot.ini with required flags (/3GB /PAE). Rebooted server then created standard database, then connected to db instance and changed oracle parameters DB_BLOCK_BUFFERS, USE_INDIRECT_DATA_BUFFERS as required. Restarted DB instance, DB fails to restarted with SGA memory error. According to oracle user docs the SGA is nolonger in effect due to previous settings. Can you provide example of SPFILE with parameters settings that do work and use >4GB memory. Current server has 8GB, 2 x Dual XEON core/processors (i.e. 8 processors)

The recommended /3GB switches in the boot.ini file can only be used with the following operating systems editions (KB article 291988):
Microsoft Windows 2000 Advanced Server
Microsoft Windows 2000 Data Center Server
Microsoft Windows Server 2003, Enterprise Edition
Microsoft Windows Server 2003, Data Center Edition
Microsoft Windows Small Business Server 2003
Important: Windows 2000 and 2003 Server Standard Editions DO NOT SUPPORT /3GB Switch.
So if your OS is listed above, then you cannot have a larger SGA.

Problem:obtaing file name using Dynamic configuration of file adapter

hi all
I am using Dynamic configuration for getting file name.
I am getting Dynamic configuration in SXMB_MONI containg file name, but payload is empty unlike file i am sending.

Hi All,
Basically my requirement to get Filename in idoc segments in order to validate the posting at month end.
Its an File to idoc scenario- GL Posting.
Please check attached UDF and it gives error. Kindly help. Thanks

Using Dynamic Configuration api for SOAP adapter

I want to use Dynamic Configuration api to send a SOAP request to a webservice.
tha value in my adapter is
my Target URL is
http://xidr3.bcs.de:50000/XISOAPAdapter/MessageServlet? channel=:Routing2_Service:SS_SOAP_Sender_Working_June12&nosoap=true
which is the corresponding field i have to set in Dynamic Configuration?
I have written the following code is this right?
DynamicConfiguration conf = (DynamicConfiguration) container.getTransformationParameters().get(StreamTransformationConstants.DYNAMIC_CONFIGURATION);
String temp = "http:/"+"/sap.com/xi/XI/System/SOAP";
DynamicConfigurationKey key = DynamicConfigurationKey.create(temp, "TServerLocation");
String varURL =
"http:/"+"/xidr3.bcs.de:50000/XISOAPAdapter/MessageServlet?channel=:Routing2_Service:SS_SOAP_Sender_Working_June12&nosoap=true";
conf.put(key,varURL);
return "";

Hi,
Yes, your code looks fine. Can you let me know what is the error you are getting. Have you checked the Flag in your communication channel.
Use Adapter-Specific Message Attributes
Variable Transport Binding
Once you test your scenario you can see the Dynamic URL in your message Header by going to tcode sxmb_moni. See if you are able to find something called DynamicConfiguration in your message haeader. If yes what is the value set there.
PS: From the target URL you posted It looks like your webservice is hosted on the XI box itself. Is it the same XI box or different box? Just curious to know.
Reward point if answer is helpful
Thanks
Amit

Accesing Runtime Parameters using Dynamic configuration

Hi..
Can we access the following parameters from mapping using DYNAMIC CONFIGURATION key?
<SAP:TraceLevel>1</SAP:TraceLevel>
<SAP:LogSeqNbr>000</SAP:LogSeqNbr>
<SAP:RetryLogSeqNbr>000</SAP:RetryLogSeqNbr>
<SAP:QIdInternal>XBTI0001</SAP:QIdInternal>
Please let me know how to access
Thanks
Ram

Hi Ram,
I dont think we can achieve this one,only two ways to read any values at mapping level
1)Dynamic Configuration--Option ruled out....not possible,
2)Write some java coding to read the value,i think this one also not work it out.
your req unique..i am looking for answer..:)
Cheers,
Raj

Getting file directory using dynamic configuration:Code needed

Hi,
I need the code for getting the source file directory name using dynamic configuration. Also, an explanation on how it can be used in mapping for comparison.
Thanks,
Vishal

Hi Vishal,
Refer carefully the following blog by micheal to get the Attributes dynamically during runtime by enabling the Adapter Specific message Attributes in adapter level.
/people/michal.krawczyk2/blog/2005/11/10/xi-the-same-filename-from-a-sender-to-a-receiver-file-adapter--sp14
Create an UDF in mapping with no input parameters to it and include the piece of code and use it according to your requirement in mapping.
//write your code here
try{
String filedirectory    = "";
DynamicConfiguration conf1 = (DynamicConfiguration) container
    .getTransformationParameters()
    .get(StreamTransformationConstants.DYNAMIC_CONFIGURATION);
DynamicConfigurationKey key1 = DynamicConfigurationKey.create( "http:/"+"/sap.com/xi/XI/System/File","Directory");
filedirectory = conf1.get(key1);
return filedirectory;
catch(Exception e)
     String exception = e.toString();
      return exception;
Thanks,
Ram.

Configuring SP13 to use dynamic memory

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