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CPULimitPause

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CPULimitPause specifies the percentage of CPU time, in 1/1000ths of a percent, that all isolated processes on the Web server can occupy during a given process accounting interval (specified by CPUResetInterval). If the processes attempt to occupy more CPU time than specified in CpuLimitPause, IIS pauses the entire site, and any new client requests receives a custom error indicating that the server is out of resources. The site remains in a paused state until the current reset interval has ended. Any limit overrun is recorded in the Windows Event Log, and, if process accounting is enabled, in the IIS log as well.

If CpuLimitPause is set to 0, or a value greater than 100,000 (100 percent), IIS does not pause the site. However, one of the other process throttling properties, such as CPULimitLogEvent, CPULimitPriority, or CPULimitProcStop, could generate a response from IIS if a CPU limit is exceeded.

note Note Because process accounting in IIS uses Windows Job Objects to monitor CPU times for an entire process, process accounting logs and throttles only those applications that are isolated in a separate process from IIS.

Process throttling and process accounting are independently controlled by several other metabase properties.

To properly activate process throttling, CPULimitsEnabled must be set to true, and at least one of the following properties must be set to true:CPULimitLogEvent, CPULimitPriority, CPULimitProcStop, or CpuLimitPause.

important Important Applications that do not have process throttling enabled do not contribute to the total CPU time for the purposes of calculating CPU limit overruns.

Attribute Name Attribute Value
XML Data Type DWORD
WMI Data Type
SINT32
ADSI Data Type DWORD
ABO Data Type DWORD
ABO Metabase identifier
MD_CPU_LIMIT_PAUSE
Attributes INHERIT
Default Value 0
MetaFlagsEx CACHE_PROPERTY_MODIFIED
User Type IIS_MD_UT_SERVER
StartingNumber Not applicable
EndingNumber 0
ID 2152

Configurable Locations

You can configure this property at the following locations in the IIS metabase.

Code Example

For general code examples, please see Code Examples to Configure Metabase Properties