The Official Microsoft IIS Site. Overview. The < cpu> element of the < add> element in the < application. Pools> collection configures values for CPU usage parameters and CPU actions that will be used in application pools. NUMA Support. Non- Uniform Memory Access (NUMA) is a hardware- based method of associating processors to their own dedicated memory. NUMA is used to increase processor speed as an alternative to the traditional symmetric multiprocessor (SMP) model for multiprocessor support. You can set up IIS 8 and later to distribute and affinitize its processes on NUMA. The use of NUMA is configured in the CPU element by the numa. Node. Assignment attribute that enables IIS to identify the most optimal NUMA node when the IIS worker process is about to start, and the numa. Node. Affinity. Mode attribute that determines how the threads from an IIS worker process are affinitized to a NUMA node. NUMA is also configured using the Max. Processes attribute of the process. Model element, which when set to 0 specifies that IIS automatically runs the same number of worker processes as there are NUMA nodes. For more information, see IIS 8. Multicore Scaling on NUMA Hardware. The NUMA selection logic and affinity type can be set in the Advanced Settings dialog box only if IIS is running on NUMA hardware. CPU rate limits in Windows Server 2008 R2. This article documents support for limiting the CPU usage of. CPU rate limit can be set on an. How To Limit CPU Usage Of A Process. How To Limit CPU Usage Of A Process In Windows. Windows utility that you can use to limit and monitor the CPU usage of any. Compatibility. Version. Notes. IIS 1. 0. 0. The < cpu> element was not modified in IIS 1. IIS 8. 5. The < cpu> element was not modified in IIS 8. IIS 8. 0. Two enum values were added to the action attribute to define throttling behavior. The processor. Group attribute was added to define the number of processor groups used. The numa. Node. Assignment and numa. Node. Affinity. Mode attributes were added to specify the behavior of NUMA nodes. IIS 7. 5. The < cpu> element was not modified in IIS 7. IIS 7. 0. The < cpu> element was introduced in IIS 7. IIS 6. 0. The < cpu> element replaces portions of the IIS 6. IIs. Application. Pools metabase property. Setup. The < application. Pools> collection is included in the default installation of IIS 7 and later. How To. How to edit CPU configuration settings. Open Internet Information Services (IIS) Manager. Limit: Optional uint attribute. Configures the maximum percentage of CPU time (in 1/1000ths of one percent) that the worker processes in an application pool are. How can I programmatically limit my program's. 100% of CPU usage, can I limit this usage. I need to control my application's CPU usage to a certain limit. My application will run on Win XP, Vista, Win7 and Windows 8. I tried implementing to get the current. If you are using Windows Server 2. Windows Server 2. R2. On the taskbar, click Server Manager, click Tools, and then click Internet Information Services (IIS) Manager. If you are using Windows 8 or Windows 8. Hold down the Windows key, press the letter X, and then click Control Panel. If you are using Windows Server 2. Windows Server 2. R2. On the taskbar, click Start, point to Administrative Tools, and then click Internet Information Services (IIS) Manager. If you are using Windows Vista or Windows 7. On the taskbar, click Start, and then click Control Panel. In the Connections pane, expand the server name, click Application Pools, and then click the application pool that you want to edit. In the Actions pane, click Advanced Settings.. In the Advanced Settings dialog box, click the CPU property that you want to edit, then edit the value in the property value section of the dialog box, and then click OK. For example, you could change the Limit Action to No. Action, Kill. W3wp, Throttle, or Throttle. Under. Load. How to configure IIS for use with Non- Uniform Memory Access (NUMA) hardware. On the task bar, click Server Manager, click Tools, and then click Internet Information Services (IIS) Manager. The action attribute is configured on a per- application pool basis. The action attribute can be one of the following possible values. The default value is No. Action. Value. Description. No. Action. No action is taken when the CPU limit is exceeded. A warning is written to the event log. The Limit interval is not used and an event log entry is generated. The Limit interval is not used and an event log entry is generated. If the limit set by the limit attribute is exceeded, an event is written to the event log and an optional set of events can be triggered. These optional events are determined by the action attribute. The default value is 0, which disables CPU limiting. Node. Affinity. Mode. Optional enum attribute. The default value is Soft. Value. Description. Soft. As long as the cores in a NUMA node to which a process is affinitized are available, all threads of the process will be scheduled on those cores. However, if the scheduler cannot schedule the process on the cores of the node that it is affinitized to, it can schedule the process on cores in another NUMA node. No threads of that process will be scheduled on cores in another NUMA node. A NUMA node contains clusters of cores that share a single memory bank. This attribute is available in the CPU Advanced Settings only if NUMA nodes are available. The numa. Node. Assignment attribute can be one of the following possible values. The default value is Most Available Memory. Value. Description. Most Available Memory. The process will be assigned to the NUMA node that has the most memory free. A processor group contains multiple cores. The Processor Group attribute is available in the CPU Advanced Settings only if the server has multiple processor groups. The default value is 0, which means that a single processor group is used. Interval. Optional time. Span attribute. When the number of minutes elapsed since the last process accounting reset equals the number specified by this property, IIS resets the CPU timers for both the logging and limit intervals. Important: The reset. Interval value must be greater than the time between logging operations, otherwise IIS will reset counters before logging has occurred, and process accounting will not occur. Note: Because process accounting in IIS uses Windows job objects to monitor CPU times for the whole process, process accounting will only log and throttle applications that are isolated in a separate process from IIS. The default value is 0. This property is used together with the smp. Processor. Affinity. Mask and smp. Processor. Affinity. Mask. 2 attributes. The default value is false. Processor. Affinity. Mask. Optional uint attribute. Before this property takes effect, the smp. Affinitized attribute must be set to true for the application pool. Note: On 6. 4- bit computers, the smp. Processor. Affinity. Mask attribute contains the low- order DWORD for the processor mask, and the smp. Processor. Affinity. Mask. 2 attribute contains the high- order DWORD for the processor mask. On 3. 2- bit computers, the smp. Processor. Affinity. Mask. 2 attribute has no effect. If you set the value to 1 (which corresponds to 0. If you set the value to 2 (which corresponds to 0. If you set the value to 3 (which corresponds to 0. Note: Do not set this property to 0. Doing so disables symmetric multiprocessing (SMP) affinity and creates an error condition. This means that processes running on one CPU will not remain affiliated with that CPU throughout their lifetime. The default value is 4. Processor. Affinity. Mask. 2Optional uint attribute. Before this property takes effect, the smp. Affinitized attribute must be set to true for the application pool. Note: On 6. 4- bit computers, the smp. Processor. Affinity. Mask attribute contains the low- order DWORD for the processor mask, and the smp. Processor. Affinity. Mask. 2 attribute contains the high- order DWORD for the processor mask. On 3. 2- bit computers, the smp. Processor. Affinity. Mask. 2 attribute has no effect. The default value is 4. Child Elements. None. Configuration Sample. The following configuration sample configures a single application pool named Default. App. Pool and sets the CPU to 5. Pools>. < add name=. This commits the configuration settings to the appropriate location section in the Application. Host. config file. C#using System. using System. Text. using Microsoft. Web. Administration.
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