Gets or sets a value that specifies the maximum number of InstanceContext objects in the service that can execute at one time.
Assembly: System.ServiceModel (in System.ServiceModel.dll)
The property specifies the maximum number of InstanceContext objects in the service. It is important to keep in mind the relationship between the property and the InstanceContextMode property. If InstanceContextMode is PerSession, the resulting value is the total number of sessions. If InstanceContextMode is PerCall, the resulting value is the number of concurrent calls. If a message arrives while the maximum number of InstanceContext objects already exist, the message is held until an InstanceContext object closes.
You can also set the values of this attribute by using the <serviceThrottling> element in an application configuration file.
The following code example shows the use of ServiceThrottlingBehavior from an application configuration file that sets the MaxConcurrentSessions, MaxConcurrentCalls and properties to 1 as an example. Real-world experience determines what the optimal settings are for any particular application.
<configuration> <appSettings> <!-- use appSetting to configure base address provided by host --> <add key="baseAddress" value="http://localhost:8080/ServiceMetadata" /> </appSettings> <system.serviceModel> <services> <service name="Microsoft.WCF.Documentation.SampleService" behaviorConfiguration="Throttled" > <host> <baseAddresses> <add baseAddress="http://localhost:8080/SampleService"/> </baseAddresses> </host> <endpoint address="" binding="wsHttpBinding" contract="Microsoft.WCF.Documentation.ISampleService" /> <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" /> </service> </services> <behaviors> <serviceBehaviors> <behavior name="Throttled"> <serviceThrottling maxConcurrentCalls="1" maxConcurrentSessions="1" maxConcurrentInstances="1" /> <serviceMetadata httpGetEnabled="true" httpGetUrl="" /> </behavior> </serviceBehaviors> </behaviors> </system.serviceModel> </configuration>
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.